summaryrefslogtreecommitdiff
AgeCommit message (Collapse)Author
2019-06-30Linux 5.2-rc7v5.2-rc7Linus Torvalds
2019-06-30Merge tag 'powerpc-5.2-7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fix from Michael Ellerman: "One fix for a regression in my commit adding KUAP (Kernel User Access Prevention) on Radix, which incorrectly touched the AMR in the early machine check handler. Thanks to Nicholas Piggin" * tag 'powerpc-5.2-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/64s/exception: Fix machine check early corrupting AMR
2019-06-30Merge branch 'smp-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull SMP fixes from Thomas Gleixner: "Two small changes for the cpu hotplug code: - Prevent out of bounds access which actually might crash the machine caused by a missing bounds check in the fail injection code - Warn about unsupported migitation mode command line arguments to make people aware that they typoed the paramater. Not necessarily a fix but quite some people tripped over that" * 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: cpu/hotplug: Fix out-of-bounds read when setting fail state cpu/speculation: Warn on unsupported mitigations= parameter
2019-06-29Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Ingo Molnar: "Misc fixes all over the place: - might_sleep() atomicity fix in the microcode loader - resctrl boundary condition fix - APIC arithmethics bug fix for frequencies >= 4.2 GHz - three 5-level paging crash fixes - two speculation fixes - a perf/stacktrace fix" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/unwind/orc: Fall back to using frame pointers for generated code perf/x86: Always store regs->ip in perf_callchain_kernel() x86/speculation: Allow guests to use SSBD even if host does not x86/mm: Handle physical-virtual alignment mismatch in phys_p4d_init() x86/boot/64: Add missing fixup_pointer() for next_early_pgt access x86/boot/64: Fix crash if kernel image crosses page table boundary x86/apic: Fix integer overflow on 10 bit left shift of cpu_khz x86/resctrl: Prevent possible overrun during bitmap operations x86/microcode: Fix the microcode load on CPU hotplug for real
2019-06-29Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "Various fixes, most of them related to bugs perf fuzzing found in the x86 code" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/regs: Use PERF_REG_EXTENDED_MASK perf/x86: Remove pmu->pebs_no_xmm_regs perf/x86: Clean up PEBS_XMM_REGS perf/x86/regs: Check reserved bits perf/x86: Disable extended registers for non-supported PMUs perf/ioctl: Add check for the sample_period value perf/core: Fix perf_sample_regs_user() mm check
2019-06-29Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fixes from Ingo Molnar: "Diverse irqchip driver fixes" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/gic-v3-its: Fix command queue pointer comparison bug irqchip/mips-gic: Use the correct local interrupt map registers irqchip/ti-sci-inta: Fix kernel crash if irq_create_fwspec_mapping fail irqchip/irq-csky-mpintc: Support auto irq deliver to all cpus
2019-06-29Merge branch 'efi-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull EFI fixes from Ingo Molnar: "Four fixes: - fix a kexec crash on arm64 - fix a reboot crash on some Android platforms - future-proof the code for upcoming ACPI 6.2 changes - fix a build warning on x86" * 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efibc: Replace variable set function in notifier call x86/efi: fix a -Wtype-limits compilation warning efi/bgrt: Drop BGRT status field reserved bits check efi/memreserve: deal with memreserve entries in unmapped memory
2019-06-29Merge tag 'pm-5.2-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management fix from Rafael Wysocki: "Avoid skipping bus-level PCI power management during system resume for PCIe ports left in D0 during the preceding suspend transition on platforms where the power states of those ports can change out of the PCI layer's control" * tag 'pm-5.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PCI: PM: Avoid skipping bus-level PM on platforms without ACPI
2019-06-29Merge tag 'xarray-5.2-rc6' of git://git.infradead.org/users/willy/linux-daxLinus Torvalds
Pull XArray fixes from Matthew Wilcox: - Account XArray nodes for the page cache to the appropriate cgroup (Johannes Weiner) - Fix idr_get_next() when called under the RCU lock (Matthew Wilcox) - Add a test for xa_insert() (Matthew Wilcox) * tag 'xarray-5.2-rc6' of git://git.infradead.org/users/willy/linux-dax: XArray tests: Add check_insert idr: Fix idr_get_next race with idr_remove mm: fix page cache convergence regression
2019-06-29Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge misc fixes from Andrew Morton: "15 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: linux/kernel.h: fix overflow for DIV_ROUND_UP_ULL mm, swap: fix THP swap out fork,memcg: alloc_thread_stack_node needs to set tsk->stack MAINTAINERS: add CLANG/LLVM BUILD SUPPORT info mm/vmalloc.c: avoid bogus -Wmaybe-uninitialized warning mm/page_idle.c: fix oops because end_pfn is larger than max_pfn initramfs: fix populate_initrd_image() section mismatch mm/oom_kill.c: fix uninitialized oc->constraint mm: hugetlb: soft-offline: dissolve_free_huge_page() return zero on !PageHuge mm: soft-offline: return -EBUSY if set_hwpoison_free_buddy_page() fails signal: remove the wrong signal_pending() check in restore_user_sigmask() fs/binfmt_flat.c: make load_flat_shared_library() work mm/mempolicy.c: fix an incorrect rebind node in mpol_rebind_nodemask fs/proc/array.c: allow reporting eip/esp for all coredumping threads mm/dev_pfn: exclude MEMORY_DEVICE_PRIVATE while computing virtual address
2019-06-29Merge tag 'arc-5.2-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC fixes from Vineet Gupta: - hsdk platform unifying apertures - build system CROSS_COMPILE prefix * tag 'arc-5.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: [plat-hsdk]: unify memory apertures configuration ARC: build: Try to guess CROSS_COMPILE with cc-cross-prefix
2019-06-29Merge tag 'riscv-for-v5.2/fixes-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux Pull RISC-V fixes from Paul Walmsley: "Minor RISC-V fixes and one defconfig update. The fixes have no functional impact: - Fix some comment text in the memory management vmalloc_fault path. - Fix some warnings from the DT compiler in our newly-added DT files. - Change the newly-added DT bindings such that SoC IP blocks with external I/O are marked as "disabled" by default, then enable them explicitly in board DT files when the devices are used on the board. This aligns the bindings with existing upstream practice. - Add the MIT license as an option for a minor header file, at the request of one of the U-Boot maintainers. The RISC-V defconfig update builds the SiFive SPI driver and the MMC-SPI driver by default. The intention here is to make v5.2 more usable for testers and users with RISC-V hardware" * tag 'riscv-for-v5.2/fixes-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: riscv: mm: Fix code comment dt-bindings: clock: sifive: add MIT license as an option for the header file dt-bindings: riscv: resolve 'make dt_binding_check' warnings riscv: dts: Re-organize the DT nodes RISC-V: defconfig: enable MMC & SPI for RISC-V
2019-06-29Merge tag 'nfs-for-5.2-4' of git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds
Pull two more NFS client fixes from Anna Schumaker: "These are both stable fixes. One to calculate the correct client message length in the case of partial transmissions. And the other to set the proper TCP timeout for flexfiles" * tag 'nfs-for-5.2-4' of git://git.linux-nfs.org/projects/anna/linux-nfs: NFS/flexfiles: Use the correct TCP timeout for flexfiles I/O SUNRPC: Fix up calculation of client message length
2019-06-29Merge tag 'ceph-for-5.2-rc7' of git://github.com/ceph/ceph-clientLinus Torvalds
Pull ceph fix from Ilya Dryomov: "A small fix for a potential -rc1 regression from Jeff" * tag 'ceph-for-5.2-rc7' of git://github.com/ceph/ceph-client: ceph: fix ceph_mdsc_build_path to not stop on first component
2019-06-29Merge tag 'scsi-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fix from James Bottomley: "One simple fix for a driver use after free" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: vmw_pscsi: Fix use-after-free in pvscsi_queue_lck()
2019-06-29Merge tag 'for-linus-20190628' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block fixes from Jens Axboe: "Just two small fixes. One from Paolo, fixing a silly mistake in BFQ. The other one is from me, ensuring that we have ->file cleared in the io_uring request a bit earlier. That avoids a use-before-free, if we encounter an error before ->file is assigned" * tag 'for-linus-20190628' of git://git.kernel.dk/linux-block: block, bfq: fix operator in BFQQ_TOTALLY_SEEKY io_uring: ensure req->file is cleared on allocation
2019-06-29Merge tag 'pinctrl-v5.2-3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin control fixes from Linus Walleij: "Sorry to bomb in fixes this late. Maybe I can comfort you by saying it is only driver fixes, and mostly IRQ handling which is something GPIO and pin control drivers never get right. You think it works and then it doesn't. Summary: - Fix IRQ setup in the MCP23s08. - Fix pin setup on pins > 31 in the Ocelot driver. - Fix IRQs in the Mediatek driver" * tag 'pinctrl-v5.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: pinctrl: mediatek: Update cur_mask in mask/mask ops pinctrl: mediatek: Ignore interrupts that are wake only during resume pinctrl: ocelot: fix pinmuxing for pins after 31 pinctrl: ocelot: fix gpio direction for pins after 31 pinctrl: mcp23s08: Fix add_data and irqchip_add_nested call order
2019-06-29linux/kernel.h: fix overflow for DIV_ROUND_UP_ULLVinod Koul
DIV_ROUND_UP_ULL adds the two arguments and then invokes DIV_ROUND_DOWN_ULL. But on a 32bit system the addition of two 32 bit values can overflow. DIV_ROUND_DOWN_ULL does it correctly and stashes the addition into a unsigned long long so cast the result to unsigned long long here to avoid the overflow condition. [akpm@linux-foundation.org: DIV_ROUND_UP_ULL must be an rval] Link: http://lkml.kernel.org/r/20190625100518.30753-1-vkoul@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29mm, swap: fix THP swap outHuang Ying
0-Day test system reported some OOM regressions for several THP (Transparent Huge Page) swap test cases. These regressions are bisected to 6861428921b5 ("block: always define BIO_MAX_PAGES as 256"). In the commit, BIO_MAX_PAGES is set to 256 even when THP swap is enabled. So the bio_alloc(gfp_flags, 512) in get_swap_bio() may fail when swapping out THP. That causes the OOM. As in the patch description of 6861428921b5 ("block: always define BIO_MAX_PAGES as 256"), THP swap should use multi-page bvec to write THP to swap space. So the issue is fixed via doing that in get_swap_bio(). BTW: I remember I have checked the THP swap code when 6861428921b5 ("block: always define BIO_MAX_PAGES as 256") was merged, and thought the THP swap code needn't to be changed. But apparently, I was wrong. I should have done this at that time. Link: http://lkml.kernel.org/r/20190624075515.31040-1-ying.huang@intel.com Fixes: 6861428921b5 ("block: always define BIO_MAX_PAGES as 256") Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Hugh Dickins <hughd@google.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29fork,memcg: alloc_thread_stack_node needs to set tsk->stackAndrea Arcangeli
Commit 5eed6f1dff87 ("fork,memcg: fix crash in free_thread_stack on memcg charge fail") corrected two instances, but there was a third instance of this bug. Without setting tsk->stack, if memcg_charge_kernel_stack fails, it'll execute free_thread_stack() on a dangling pointer. Enterprise kernels are compiled with VMAP_STACK=y so this isn't critical, but custom VMAP_STACK=n builds should have some performance advantage, with the drawback of risking to fail fork because compaction didn't succeed. So as long as VMAP_STACK=n is a supported option it's worth fixing it upstream. Link: http://lkml.kernel.org/r/20190619011450.28048-1-aarcange@redhat.com Fixes: 9b6f7e163cd0 ("mm: rework memcg kernel stack accounting") Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Reviewed-by: Rik van Riel <riel@surriel.com> Acked-by: Roman Gushchin <guro@fb.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29MAINTAINERS: add CLANG/LLVM BUILD SUPPORT infoNick Desaulniers
Add keyword support so that our mailing list gets cc'ed for clang/llvm patches. We're pretty active on our mailing list so far as code review. There are numerous Googlers like myself that are paid to support building the Linux kernel with Clang and LLVM. Link: http://lkml.kernel.org/r/20190620001907.255803-1-ndesaulniers@google.com Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29mm/vmalloc.c: avoid bogus -Wmaybe-uninitialized warningArnd Bergmann
gcc gets confused in pcpu_get_vm_areas() because there are too many branches that affect whether 'lva' was initialized before it gets used: mm/vmalloc.c: In function 'pcpu_get_vm_areas': mm/vmalloc.c:991:4: error: 'lva' may be used uninitialized in this function [-Werror=maybe-uninitialized] insert_vmap_area_augment(lva, &va->rb_node, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ &free_vmap_area_root, &free_vmap_area_list); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ mm/vmalloc.c:916:20: note: 'lva' was declared here struct vmap_area *lva; ^~~ Add an intialization to NULL, and check whether this has changed before the first use. [akpm@linux-foundation.org: tweak comments] Link: http://lkml.kernel.org/r/20190618092650.2943749-1-arnd@arndb.de Fixes: 68ad4a330433 ("mm/vmalloc.c: keep track of free blocks for vmap allocation") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Cc: Joel Fernandes <joelaf@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29mm/page_idle.c: fix oops because end_pfn is larger than max_pfnColin Ian King
Currently the calcuation of end_pfn can round up the pfn number to more than the actual maximum number of pfns, causing an Oops. Fix this by ensuring end_pfn is never more than max_pfn. This can be easily triggered when on systems where the end_pfn gets rounded up to more than max_pfn using the idle-page stress-ng stress test: sudo stress-ng --idle-page 0 BUG: unable to handle kernel paging request at 00000000000020d8 #PF error: [normal kernel read fault] PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 1 PID: 11039 Comm: stress-ng-idle- Not tainted 5.0.0-5-generic #6-Ubuntu Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 RIP: 0010:page_idle_get_page+0xc8/0x1a0 Code: 0f b1 0a 75 7d 48 8b 03 48 89 c2 48 c1 e8 33 83 e0 07 48 c1 ea 36 48 8d 0c 40 4c 8d 24 88 49 c1 e4 07 4c 03 24 d5 00 89 c3 be <49> 8b 44 24 58 48 8d b8 80 a1 02 00 e8 07 d5 77 00 48 8b 53 08 48 RSP: 0018:ffffafd7c672fde8 EFLAGS: 00010202 RAX: 0000000000000005 RBX: ffffe36341fff700 RCX: 000000000000000f RDX: 0000000000000284 RSI: 0000000000000275 RDI: 0000000001fff700 RBP: ffffafd7c672fe00 R08: ffffa0bc34056410 R09: 0000000000000276 R10: ffffa0bc754e9b40 R11: ffffa0bc330f6400 R12: 0000000000002080 R13: ffffe36341fff700 R14: 0000000000080000 R15: ffffa0bc330f6400 FS: 00007f0ec1ea5740(0000) GS:ffffa0bc7db00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000020d8 CR3: 0000000077d68000 CR4: 00000000000006e0 Call Trace: page_idle_bitmap_write+0x8c/0x140 sysfs_kf_bin_write+0x5c/0x70 kernfs_fop_write+0x12e/0x1b0 __vfs_write+0x1b/0x40 vfs_write+0xab/0x1b0 ksys_write+0x55/0xc0 __x64_sys_write+0x1a/0x20 do_syscall_64+0x5a/0x110 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Link: http://lkml.kernel.org/r/20190618124352.28307-1-colin.king@canonical.com Fixes: 33c3fc71c8cf ("mm: introduce idle page tracking") Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29initramfs: fix populate_initrd_image() section mismatchGeert Uytterhoeven
With gcc-4.6.3: WARNING: vmlinux.o(.text.unlikely+0x140): Section mismatch in reference from the function populate_initrd_image() to the variable .init.ramfs.info:__initramfs_size The function populate_initrd_image() references the variable __init __initramfs_size. This is often because populate_initrd_image lacks a __init annotation or the annotation of __initramfs_size is wrong. WARNING: vmlinux.o(.text.unlikely+0x14c): Section mismatch in reference from the function populate_initrd_image() to the function .init.text:unpack_to_rootfs() The function populate_initrd_image() references the function __init unpack_to_rootfs(). This is often because populate_initrd_image lacks a __init annotation or the annotation of unpack_to_rootfs is wrong. WARNING: vmlinux.o(.text.unlikely+0x198): Section mismatch in reference from the function populate_initrd_image() to the function .init.text:xwrite() The function populate_initrd_image() references the function __init xwrite(). This is often because populate_initrd_image lacks a __init annotation or the annotation of xwrite is wrong. Indeed, if the compiler decides not to inline populate_initrd_image(), a warning is generated. Fix this by adding the missing __init annotations. Link: http://lkml.kernel.org/r/20190617074340.12779-1-geert@linux-m68k.org Fixes: 7c184ecd262fe64f ("initramfs: factor out a helper to populate the initrd image") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29mm/oom_kill.c: fix uninitialized oc->constraintYafang Shao
In dump_oom_summary() oc->constraint is used to show oom_constraint_text, but it hasn't been set before. So the value of it is always the default value 0. We should inititialize it before. Bellow is the output when memcg oom occurs, before this patch: oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null), cpuset=/,mems_allowed=0,oom_memcg=/foo,task_memcg=/foo,task=bash,pid=7997,uid=0 after this patch: oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null), cpuset=/,mems_allowed=0,oom_memcg=/foo,task_memcg=/foo,task=bash,pid=13681,uid=0 Link: http://lkml.kernel.org/r/1560522038-15879-1-git-send-email-laoar.shao@gmail.com Fixes: ef8444ea01d7 ("mm, oom: reorganize the oom report in dump_header") Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Wind Yu <yuzhoujian@didichuxing.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29mm: hugetlb: soft-offline: dissolve_free_huge_page() return zero on !PageHugeNaoya Horiguchi
madvise(MADV_SOFT_OFFLINE) often returns -EBUSY when calling soft offline for hugepages with overcommitting enabled. That was caused by the suboptimal code in current soft-offline code. See the following part: ret = migrate_pages(&pagelist, new_page, NULL, MPOL_MF_MOVE_ALL, MIGRATE_SYNC, MR_MEMORY_FAILURE); if (ret) { ... } else { /* * We set PG_hwpoison only when the migration source hugepage * was successfully dissolved, because otherwise hwpoisoned * hugepage remains on free hugepage list, then userspace will * find it as SIGBUS by allocation failure. That's not expected * in soft-offlining. */ ret = dissolve_free_huge_page(page); if (!ret) { if (set_hwpoison_free_buddy_page(page)) num_poisoned_pages_inc(); } } return ret; Here dissolve_free_huge_page() returns -EBUSY if the migration source page was freed into buddy in migrate_pages(), but even in that case we actually has a chance that set_hwpoison_free_buddy_page() succeeds. So that means current code gives up offlining too early now. dissolve_free_huge_page() checks that a given hugepage is suitable for dissolving, where we should return success for !PageHuge() case because the given hugepage is considered as already dissolved. This change also affects other callers of dissolve_free_huge_page(), which are cleaned up together. [n-horiguchi@ah.jp.nec.com: v3] Link: http://lkml.kernel.org/r/1560761476-4651-3-git-send-email-n-horiguchi@ah.jp.nec.comLink: http://lkml.kernel.org/r/1560154686-18497-3-git-send-email-n-horiguchi@ah.jp.nec.com Fixes: 6bc9b56433b76 ("mm: fix race on soft-offlining") Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Reported-by: Chen, Jerry T <jerry.t.chen@intel.com> Tested-by: Chen, Jerry T <jerry.t.chen@intel.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Michal Hocko <mhocko@kernel.org> Cc: Xishi Qiu <xishi.qiuxishi@alibaba-inc.com> Cc: "Chen, Jerry T" <jerry.t.chen@intel.com> Cc: "Zhuo, Qiuxu" <qiuxu.zhuo@intel.com> Cc: <stable@vger.kernel.org> [4.19+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29mm: soft-offline: return -EBUSY if set_hwpoison_free_buddy_page() failsNaoya Horiguchi
The pass/fail of soft offline should be judged by checking whether the raw error page was finally contained or not (i.e. the result of set_hwpoison_free_buddy_page()), but current code do not work like that. It might lead us to misjudge the test result when set_hwpoison_free_buddy_page() fails. Without this fix, there are cases where madvise(MADV_SOFT_OFFLINE) may not offline the original page and will not return an error. Link: http://lkml.kernel.org/r/1560154686-18497-2-git-send-email-n-horiguchi@ah.jp.nec.com Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Fixes: 6bc9b56433b76 ("mm: fix race on soft-offlining") Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Michal Hocko <mhocko@kernel.org> Cc: Xishi Qiu <xishi.qiuxishi@alibaba-inc.com> Cc: "Chen, Jerry T" <jerry.t.chen@intel.com> Cc: "Zhuo, Qiuxu" <qiuxu.zhuo@intel.com> Cc: <stable@vger.kernel.org> [4.19+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29signal: remove the wrong signal_pending() check in restore_user_sigmask()Oleg Nesterov
This is the minimal fix for stable, I'll send cleanups later. Commit 854a6ed56839 ("signal: Add restore_user_sigmask()") introduced the visible change which breaks user-space: a signal temporary unblocked by set_user_sigmask() can be delivered even if the caller returns success or timeout. Change restore_user_sigmask() to accept the additional "interrupted" argument which should be used instead of signal_pending() check, and update the callers. Eric said: : For clarity. I don't think this is required by posix, or fundamentally to : remove the races in select. It is what linux has always done and we have : applications who care so I agree this fix is needed. : : Further in any case where the semantic change that this patch rolls back : (aka where allowing a signal to be delivered and the select like call to : complete) would be advantage we can do as well if not better by using : signalfd. : : Michael is there any chance we can get this guarantee of the linux : implementation of pselect and friends clearly documented. The guarantee : that if the system call completes successfully we are guaranteed that no : signal that is unblocked by using sigmask will be delivered? Link: http://lkml.kernel.org/r/20190604134117.GA29963@redhat.com Fixes: 854a6ed56839a40f6b5d02a2962f48841482eec4 ("signal: Add restore_user_sigmask()") Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reported-by: Eric Wong <e@80x24.org> Tested-by: Eric Wong <e@80x24.org> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Jason Baron <jbaron@akamai.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: David Laight <David.Laight@ACULAB.COM> Cc: <stable@vger.kernel.org> [5.0+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29fs/binfmt_flat.c: make load_flat_shared_library() workJann Horn
load_flat_shared_library() is broken: It only calls load_flat_file() if prepare_binprm() returns zero, but prepare_binprm() returns the number of bytes read - so this only happens if the file is empty. Instead, call into load_flat_file() if the number of bytes read is non-negative. (Even if the number of bytes is zero - in that case, load_flat_file() will see nullbytes and return a nice -ENOEXEC.) In addition, remove the code related to bprm creds and stop using prepare_binprm() - this code is loading a library, not a main executable, and it only actually uses the members "buf", "file" and "filename" of the linux_binprm struct. Instead, call kernel_read() directly. Link: http://lkml.kernel.org/r/20190524201817.16509-1-jannh@google.com Fixes: 287980e49ffc ("remove lots of IS_ERR_VALUE abuses") Signed-off-by: Jann Horn <jannh@google.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Kees Cook <keescook@chromium.org> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29mm/mempolicy.c: fix an incorrect rebind node in mpol_rebind_nodemaskzhong jiang
mpol_rebind_nodemask() is called for MPOL_BIND and MPOL_INTERLEAVE mempoclicies when the tasks's cpuset's mems_allowed changes. For policies created without MPOL_F_STATIC_NODES or MPOL_F_RELATIVE_NODES, it works by remapping the policy's allowed nodes (stored in v.nodes) using the previous value of mems_allowed (stored in w.cpuset_mems_allowed) as the domain of map and the new mems_allowed (passed as nodes) as the range of the map (see the comment of bitmap_remap() for details). The result of remapping is stored back as policy's nodemask in v.nodes, and the new value of mems_allowed should be stored in w.cpuset_mems_allowed to facilitate the next rebind, if it happens. However, 213980c0f23b ("mm, mempolicy: simplify rebinding mempolicies when updating cpusets") introduced a bug where the result of remapping is stored in w.cpuset_mems_allowed instead. Thus, a mempolicy's allowed nodes can evolve in an unexpected way after a series of rebinding due to cpuset mems_allowed changes, possibly binding to a wrong node or a smaller number of nodes which may e.g. overload them. This patch fixes the bug so rebinding again works as intended. [vbabka@suse.cz: new changlog] Link: http://lkml.kernel.org/r/ef6a69c6-c052-b067-8f2c-9d615c619bb9@suse.cz Link: http://lkml.kernel.org/r/1558768043-23184-1-git-send-email-zhongjiang@huawei.com Fixes: 213980c0f23b ("mm, mempolicy: simplify rebinding mempolicies when updating cpusets") Signed-off-by: zhong jiang <zhongjiang@huawei.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Oscar Salvador <osalvador@suse.de> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Ralph Campbell <rcampbell@nvidia.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29fs/proc/array.c: allow reporting eip/esp for all coredumping threadsJohn Ogness
0a1eb2d474ed ("fs/proc: Stop reporting eip and esp in /proc/PID/stat") stopped reporting eip/esp and fd7d56270b52 ("fs/proc: Report eip/esp in /prod/PID/stat for coredumping") reintroduced the feature to fix a regression with userspace core dump handlers (such as minicoredumper). Because PF_DUMPCORE is only set for the primary thread, this didn't fix the original problem for secondary threads. Allow reporting the eip/esp for all threads by checking for PF_EXITING as well. This is set for all the other threads when they are killed. coredump_wait() waits for all the tasks to become inactive before proceeding to invoke a core dumper. Link: http://lkml.kernel.org/r/87y32p7i7a.fsf@linutronix.de Link: http://lkml.kernel.org/r/20190522161614.628-1-jlu@pengutronix.de Fixes: fd7d56270b526ca3 ("fs/proc: Report eip/esp in /prod/PID/stat for coredumping") Signed-off-by: John Ogness <john.ogness@linutronix.de> Reported-by: Jan Luebbe <jlu@pengutronix.de> Tested-by: Jan Luebbe <jlu@pengutronix.de> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29mm/dev_pfn: exclude MEMORY_DEVICE_PRIVATE while computing virtual addressAnshuman Khandual
The presence of struct page does not guarantee linear mapping for the pfn physical range. Device private memory which is non-coherent is excluded from linear mapping during devm_memremap_pages() though they will still have struct page coverage. Change pfn_t_to_virt() to just check for device private memory before giving out virtual address for a given pfn. pfn_t_to_virt() actually has no callers. Let's fix it for the 5.2 kernel and remove it in 5.3. Link: http://lkml.kernel.org/r/1558089514-25067-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Jérôme Glisse <jglisse@redhat.com> Cc: Laurent Dufour <ldufour@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-28NFS/flexfiles: Use the correct TCP timeout for flexfiles I/OTrond Myklebust
Fix a typo where we're confusing the default TCP retrans value (NFS_DEF_TCP_RETRANS) for the default TCP timeout value. Fixes: 15d03055cf39f ("pNFS/flexfiles: Set reasonable default ...") Cc: stable@vger.kernel.org # 4.8+ Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-06-28SUNRPC: Fix up calculation of client message lengthTrond Myklebust
In the case where a record marker was used, xs_sendpages() needs to return the length of the payload + record marker so that we operate correctly in the case of a partial transmission. When the callers check return value, they therefore need to take into account the record marker length. Fixes: 06b5fc3ad94e ("Merge tag 'nfs-rdma-for-5.1-1'...") Cc: stable@vger.kernel.org # 5.1+ Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-06-28Merge tag 'clk-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux Pull clk fixes from Stephen Boyd: "A handful of clk driver fixes and one core framework fix - Do a DT/firmware lookup in clk_core_get() even when the DT index is a nonsensical value - Fix some clk data typos in the Amlogic DT headers/code - Avoid returning junk in the TI clk driver when an invalid clk is looked for - Fix dividers for the emac clks on Stratix10 SoCs - Fix default HDA rates on Tegra210 to correct distorted audio" * tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: clk: socfpga: stratix10: fix divider entry for the emac clocks clk: Do a DT parent lookup even when index < 0 clk: tegra210: Fix default rates for HDA clocks clk: ti: clkctrl: Fix returning uninitialized data clk: meson: meson8b: fix a typo in the VPU parent names array variable clk: meson: fix MPLL 50M binding id typo
2019-06-28Merge tag 'for-5.2/dm-fixes-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper fixes from Mike Snitzer: - Fix incorrect uses of kstrndup and DM logging macros in DM's early init code. - Fix DM log-writes target's handling of super block sectors so updates are made in order through use of completion. - Fix DM core's argument splitting code to avoid undefined behaviour reported as a side-effect of UBSAN analysis on ppc64le. - Fix DM verity target to limit the amount of error messages that can result from a corrupt block being found. * tag 'for-5.2/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm verity: use message limit for data block corruption message dm table: don't copy from a NULL pointer in realloc_argv() dm log writes: make sure super sector log updates are written in order dm init: remove trailing newline from calls to DMERR() and DMINFO() dm init: fix incorrect uses of kstrndup()
2019-06-28Merge tag 'for-linus-20190627' of ↵Linus Torvalds
gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux Pull pidfd fixes from Christian Brauner: "Userspace tools and libraries such as strace or glibc need a cheap and reliable way to tell whether CLONE_PIDFD is supported. The easiest way is to pass an invalid fd value in the return argument, perform the syscall and verify the value in the return argument has been changed to a valid fd. However, if CLONE_PIDFD is specified we currently check if pidfd == 0 and return EINVAL if not. The check for pidfd == 0 was originally added to enable us to abuse the return argument for passing additional flags along with CLONE_PIDFD in the future. However, extending legacy clone this way would be a terrible idea and with clone3 on the horizon and the ability to reuse CLONE_DETACHED with CLONE_PIDFD there's no real need for this clutch. So remove the pidfd == 0 check and help userspace out. Also, accordig to Al, anon_inode_getfd() should only be used past the point of no failure and ksys_close() should not be used at all since it is far too easy to get wrong. Al's motto being "basically, once it's in descriptor table, it's out of your control". So Al's patch switches back to what we already had in v1 of the original patchset and uses a anon_inode_getfile() + put_user() + fd_install() sequence in the success path and a fput() + put_unused_fd() in the failure path. The other two changes should be trivial" * tag 'for-linus-20190627' of gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux: proc: remove useless d_is_dir() check copy_process(): don't use ksys_close() on cleanups samples: make pidfd-metadata fail gracefully on older kernels fork: don't check parent_tidptr with CLONE_PIDFD
2019-06-28Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid Pull HID fixes from Jiri Kosina: - fix for one corner case in HID++ protocol with respect to handling very long reports, from Hans de Goede - power management fix in Intel-ISH driver, from Hyungwoo Yang - use-after-free fix in Intel-ISH driver, from Dan Carpenter - a couple of new device IDs/quirks from Kai-Heng Feng, Kyle Godbey and Oleksandr Natalenko * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid: HID: intel-ish-hid: fix wrong driver_data usage HID: multitouch: Add pointstick support for ALPS Touchpad HID: logitech-dj: Fix forwarding of very long HID++ reports HID: uclogic: Add support for Huion HS64 tablet HID: chicony: add another quirk for PixArt mouse HID: intel-ish-hid: Fix a use after free in load_fw_from_host()
2019-06-28Merge tag 'armsoc-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc Pull ARM SoC fixes from Olof Johansson: "A smaller batch of fixes, nothing that stands out as risky or scary. Mostly DTS tweaks for a few issues: - GPU fixlets for Meson - CPU idle fix for LS1028A - PWM interrupt fixes for i.MX6UL Also, enable a driver (FSL_EDMA) on arm64 defconfig, and a warning and two MAINTAINER tweaks" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: ARM: dts: imx6ul: fix PWM[1-4] interrupts ARM: omap2: remove incorrect __init annotation ARM: dts: gemini Fix up DNS-313 compatible string ARM: dts: Blank D-Link DIR-685 console arm64: defconfig: Enable FSL_EDMA driver arm64: dts: ls1028a: Fix CPU idle fail. MAINTAINERS: BCM53573: Add internal Broadcom mailing list MAINTAINERS: BCM2835: Add internal Broadcom mailing list ARM: dts: meson8b: fix the operating voltage of the Mali GPU ARM: dts: meson8b: drop undocumented property from the Mali GPU node ARM: dts: meson8: fix GPU interrupts and drop an undocumented property
2019-06-28Merge tag 'afs-fixes-20190620' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs Pull AFS fixes from David Howells: "The in-kernel AFS client has been undergoing testing on opendev.org on one of their mirror machines. They are using AFS to hold data that is then served via apache, and Ian Wienand had reported seeing oopses, spontaneous machine reboots and updates to volumes going missing. This patch series appears to have fixed the problem, very probably due to patch (2), but it's not 100% certain. (1) Fix the printing of the "vnode modified" warning to exclude checks on files for which we don't have a callback promise from the server (and so don't expect the server to tell us when it changes). Without this, for every file or directory for which we still have an in-core inode that gets changed on the server, we may get a message logged when we next look at it. This can happen in bulk if, for instance, someone does "vos release" to update a R/O volume from a R/W volume and a whole set of files are all changed together. We only really want to log a message if the file changed and the server didn't tell us about it or we failed to track the state internally. (2) Fix accidental corruption of either afs_vlserver struct objects or the the following memory locations (which could hold anything). The issue is caused by a union that points to two different structs in struct afs_call (to save space in the struct). The call cleanup code assumes that it can simply call the cleanup for one of those structs if not NULL - when it might be actually pointing to the other struct. This means that every Volume Location RPC op is going to corrupt something. (3) Fix an uninitialised spinlock. This isn't too bad, it just causes a one-off warning if lockdep is enabled when "vos release" is called, but the spinlock still behaves correctly. (4) Fix the setting of i_block in the inode. This causes du, for example, to produce incorrect results, but otherwise should not be dangerous to the kernel" * tag 'afs-fixes-20190620' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: afs: Fix setting of i_blocks afs: Fix uninitialised spinlock afs_volume::cb_break_lock afs: Fix vlserver record corruption afs: Fix over zealous "vnode modified" warnings
2019-06-28Merge tag 'csky-for-linus-5.2-fixup-gcc-unwind' of ↵Linus Torvalds
git://github.com/c-sky/csky-linux Pull arch/csky fixup from Guo Ren: "A fixup patch for rt_sigframe in signal.c" * tag 'csky-for-linus-5.2-fixup-gcc-unwind' of git://github.com/c-sky/csky-linux: csky: Fixup libgcc unwind error
2019-06-28Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Fix ppp_mppe crypto soft dependencies, from Takashi Iawi. 2) Fix TX completion to be finite, from Sergej Benilov. 3) Use register_pernet_device to avoid a dst leak in tipc, from Xin Long. 4) Double free of TX cleanup in Dirk van der Merwe. 5) Memory leak in packet_set_ring(), from Eric Dumazet. 6) Out of bounds read in qmi_wwan, from Bjørn Mork. 7) Fix iif used in mcast/bcast looped back packets, from Stephen Suryaputra. 8) Fix neighbour resolution on raw ipv6 sockets, from Nicolas Dichtel. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (25 commits) af_packet: Block execution of tasks waiting for transmit to complete in AF_PACKET sctp: change to hold sk after auth shkey is created successfully ipv6: fix neighbour resolution with raw socket ipv6: constify rt6_nexthop() net: dsa: microchip: Use gpiod_set_value_cansleep() net: aquantia: fix vlans not working over bridged network ipv4: reset rt_iif for recirculated mcast/bcast out pkts team: Always enable vlan tx offload net/smc: Fix error path in smc_init net/smc: hold conns_lock before calling smc_lgr_register_conn() bonding: Always enable vlan tx offload net/ipv6: Fix misuse of proc_dointvec "skip_notify_on_dev_down" ipv4: Use return value of inet_iif() for __raw_v4_lookup in the while loop qmi_wwan: Fix out-of-bounds read tipc: check msg->req data len in tipc_nl_compat_bearer_disable net: macb: do not copy the mac address if NULL net/packet: fix memory leak in packet_set_ring() net/tls: fix page double free on TX cleanup net/sched: cbs: Fix error path of cbs_module_init tipc: change to use register_pernet_device ...
2019-06-28x86/unwind/orc: Fall back to using frame pointers for generated codeJosh Poimboeuf
The ORC unwinder can't unwind through BPF JIT generated code because there are no ORC entries associated with the code. If an ORC entry isn't available, try to fall back to frame pointers. If BPF and other generated code always do frame pointer setup (even with CONFIG_FRAME_POINTERS=n) then this will allow ORC to unwind through most generated code despite there being no corresponding ORC entries. Fixes: d15d356887e7 ("perf/x86: Make perf callchains work without CONFIG_FRAME_POINTER") Reported-by: Song Liu <songliubraving@fb.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Kairui Song <kasong@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Borislav Petkov <bp@alien8.de> Link: https://lkml.kernel.org/r/b6f69208ddff4343d56b7bfac1fc7cfcd62689e8.1561595111.git.jpoimboe@redhat.com
2019-06-28perf/x86: Always store regs->ip in perf_callchain_kernel()Song Liu
The stacktrace_map_raw_tp BPF selftest is failing because the RIP saved by perf_arch_fetch_caller_regs() isn't getting saved by perf_callchain_kernel(). This was broken by the following commit: d15d356887e7 ("perf/x86: Make perf callchains work without CONFIG_FRAME_POINTER") With that change, when starting with non-HW regs, the unwinder starts with the current stack frame and unwinds until it passes up the frame which called perf_arch_fetch_caller_regs(). So regs->ip needs to be saved deliberately. Fixes: d15d356887e7 ("perf/x86: Make perf callchains work without CONFIG_FRAME_POINTER") Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Kairui Song <kasong@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Borislav Petkov <bp@alien8.de> Link: https://lkml.kernel.org/r/3975a298fa52b506fea32666d8ff6a13467eee6d.1561595111.git.jpoimboe@redhat.com
2019-06-27ceph: fix ceph_mdsc_build_path to not stop on first componentJeff Layton
When ceph_mdsc_build_path is handed a positive dentry, it will return a zero-length path string with the base set to that dentry. This is not what we want. Always include at least one path component in the string. ceph_mdsc_build_path has behaved this way for a long time but it didn't matter until recent d_name handling rework. Fixes: 964fff7491e4 ("ceph: use ceph_mdsc_build_path instead of clone_dentry_name") Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-06-27pinctrl: mediatek: Update cur_mask in mask/mask opsNicolas Boichat
During suspend/resume, mtk_eint_mask may be called while wake_mask is active. For example, this happens if a wake-source with an active interrupt handler wakes the system: irq/pm.c:irq_pm_check_wakeup would disable the interrupt, so that it can be handled later on in the resume flow. However, this may happen before mtk_eint_do_resume is called: in this case, wake_mask is loaded, and cur_mask is restored from an older copy, re-enabling the interrupt, and causing an interrupt storm (especially for level interrupts). Step by step, for a line that has both wake and interrupt enabled: 1. cur_mask[irq] = 1; wake_mask[irq] = 1; EINT_EN[irq] = 1 (interrupt enabled at hardware level) 2. System suspends, resumes due to that line (at this stage EINT_EN == wake_mask) 3. irq_pm_check_wakeup is called, and disables the interrupt => EINT_EN[irq] = 0, but we still have cur_mask[irq] = 1 4. mtk_eint_do_resume is called, and restores EINT_EN = cur_mask, so it reenables EINT_EN[irq] = 1 => interrupt storm as the driver is not yet ready to handle the interrupt. This patch fixes the issue in step 3, by recording all mask/unmask changes in cur_mask. This also avoids the need to read the current mask in eint_do_suspend, and we can remove mtk_eint_chip_read_mask function. The interrupt will be re-enabled properly later on, sometimes after mtk_eint_do_resume, when the driver is ready to handle it. Fixes: 58a5e1b64bb0 ("pinctrl: mediatek: Implement wake handler and suspend resume") Signed-off-by: Nicolas Boichat <drinkcat@chromium.org> Acked-by: Sean Wang <sean.wang@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-06-27proc: remove useless d_is_dir() checkChristian Brauner
Remove the d_is_dir() check from tgid_pidfd_to_pid(). It is pointless since you should never get &proc_tgid_base_operations for f_op on a non-directory. Suggested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Christian Brauner <christian@brauner.io>
2019-06-27copy_process(): don't use ksys_close() on cleanupsAl Viro
anon_inode_getfd() should be used *ONLY* in situations when we are guaranteed to be past the last failure point (including copying the descriptor number to userland, at that). And ksys_close() should not be used for cleanups at all. anon_inode_getfile() is there for all nontrivial cases like that. Just use that... Fixes: b3e583825266 ("clone: add CLONE_PIDFD") Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Reviewed-by: Jann Horn <jannh@google.com> Signed-off-by: Christian Brauner <christian@brauner.io>
2019-06-27cpu/hotplug: Fix out-of-bounds read when setting fail stateEiichi Tsukata
Setting invalid value to /sys/devices/system/cpu/cpuX/hotplug/fail can control `struct cpuhp_step *sp` address, results in the following global-out-of-bounds read. Reproducer: # echo -2 > /sys/devices/system/cpu/cpu0/hotplug/fail KASAN report: BUG: KASAN: global-out-of-bounds in write_cpuhp_fail+0x2cd/0x2e0 Read of size 8 at addr ffffffff89734438 by task bash/1941 CPU: 0 PID: 1941 Comm: bash Not tainted 5.2.0-rc6+ #31 Call Trace: write_cpuhp_fail+0x2cd/0x2e0 dev_attr_store+0x58/0x80 sysfs_kf_write+0x13d/0x1a0 kernfs_fop_write+0x2bc/0x460 vfs_write+0x1e1/0x560 ksys_write+0x126/0x250 do_syscall_64+0xc1/0x390 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f05e4f4c970 The buggy address belongs to the variable: cpu_hotplug_lock+0x98/0xa0 Memory state around the buggy address: ffffffff89734300: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff89734380: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffff89734400: 00 00 00 00 fa fa fa fa 00 00 00 00 fa fa fa fa ^ ffffffff89734480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff89734500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Add a sanity check for the value written from user space. Fixes: 1db49484f21ed ("smp/hotplug: Hotplug state fail injection") Signed-off-by: Eiichi Tsukata <devel@etsukata.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: peterz@infradead.org Link: https://lkml.kernel.org/r/20190627024732.31672-1-devel@etsukata.com
2019-06-26af_packet: Block execution of tasks waiting for transmit to complete in ↵Neil Horman
AF_PACKET When an application is run that: a) Sets its scheduler to be SCHED_FIFO and b) Opens a memory mapped AF_PACKET socket, and sends frames with the MSG_DONTWAIT flag cleared, its possible for the application to hang forever in the kernel. This occurs because when waiting, the code in tpacket_snd calls schedule, which under normal circumstances allows other tasks to run, including ksoftirqd, which in some cases is responsible for freeing the transmitted skb (which in AF_PACKET calls a destructor that flips the status bit of the transmitted frame back to available, allowing the transmitting task to complete). However, when the calling application is SCHED_FIFO, its priority is such that the schedule call immediately places the task back on the cpu, preventing ksoftirqd from freeing the skb, which in turn prevents the transmitting task from detecting that the transmission is complete. We can fix this by converting the schedule call to a completion mechanism. By using a completion queue, we force the calling task, when it detects there are no more frames to send, to schedule itself off the cpu until such time as the last transmitted skb is freed, allowing forward progress to be made. Tested by myself and the reporter, with good results Change Notes: V1->V2: Enhance the sleep logic to support being interruptible and allowing for honoring to SK_SNDTIMEO (Willem de Bruijn) V2->V3: Rearrage the point at which we wait for the completion queue, to avoid needing to check for ph/skb being null at the end of the loop. Also move the complete call to the skb destructor to avoid needing to modify __packet_set_status. Also gate calling complete on packet_read_pending returning zero to avoid multiple calls to complete. (Willem de Bruijn) Move timeo computation within loop, to re-fetch the socket timeout since we also use the timeo variable to record the return code from the wait_for_complete call (Neil Horman) V3->V4: Willem has requested that the control flow be restored to the previous state. Doing so lets us eliminate the need for the po->wait_on_complete flag variable, and lets us get rid of the packet_next_frame function, but introduces another complexity. Specifically, but using the packet pending count, we can, if an applications calls sendmsg multiple times with MSG_DONTWAIT set, each set of transmitted frames, when complete, will cause tpacket_destruct_skb to issue a complete call, for which there will never be a wait_on_completion call. This imbalance will lead to any future call to wait_for_completion here to return early, when the frames they sent may not have completed. To correct this, we need to re-init the completion queue on every call to tpacket_snd before we enter the loop so as to ensure we wait properly for the frames we send in this iteration. Change the timeout and interrupted gotos to out_put rather than out_status so that we don't try to free a non-existant skb Clean up some extra newlines (Willem de Bruijn) Reviewed-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Reported-by: Matteo Croce <mcroce@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-27 05:31:45 +0000