pm24.git/kernel, branch v5.1-rc4

Merge branch 'akpm' (patches from Andrew)

2019-04-06T03:08:55Z

Merge misc fixes from Andrew Morton: "14 fixes" * emailed patches from Andrew Morton : kernel/sysctl.c: fix out-of-bounds access when setting file-max mm/util.c: fix strndup_user() comment sh: fix multiple function definition build errors MAINTAINERS: add maintainer and replacing reviewer ARM/NUVOTON NPCM MAINTAINERS: fix bad pattern in ARM/NUVOTON NPCM mm: writeback: use exact memcg dirty counts psi: clarify the units used in pressure files mm/huge_memory.c: fix modifying of page protection by insert_pfn_pmd() hugetlbfs: fix memory leak for resv_map mm: fix vm_fault_t cast in VM_FAULT_GET_HINDEX() lib/lzo: fix bugs for very short or empty input include/linux/bitrev.h: fix constant bitrev kmemleak: powerpc: skip scanning holes in the .bss section lib/string.c: implement a basic bcmp

kernel/sysctl.c: fix out-of-bounds access when setting file-max

2019-04-06T02:02:31Z

Commit 32a5ad9c2285 ("sysctl: handle overflow for file-max") hooked up min/max values for the file-max sysctl parameter via the .extra1 and .extra2 fields in the corresponding struct ctl_table entry. Unfortunately, the minimum value points at the global 'zero' variable, which is an int. This results in a KASAN splat when accessed as a long by proc_doulongvec_minmax on 64-bit architectures: | BUG: KASAN: global-out-of-bounds in __do_proc_doulongvec_minmax+0x5d8/0x6a0 | Read of size 8 at addr ffff2000133d1c20 by task systemd/1 | | CPU: 0 PID: 1 Comm: systemd Not tainted 5.1.0-rc3-00012-g40b114779944 #2 | Hardware name: linux,dummy-virt (DT) | Call trace: | dump_backtrace+0x0/0x228 | show_stack+0x14/0x20 | dump_stack+0xe8/0x124 | print_address_description+0x60/0x258 | kasan_report+0x140/0x1a0 | __asan_report_load8_noabort+0x18/0x20 | __do_proc_doulongvec_minmax+0x5d8/0x6a0 | proc_doulongvec_minmax+0x4c/0x78 | proc_sys_call_handler.isra.19+0x144/0x1d8 | proc_sys_write+0x34/0x58 | __vfs_write+0x54/0xe8 | vfs_write+0x124/0x3c0 | ksys_write+0xbc/0x168 | __arm64_sys_write+0x68/0x98 | el0_svc_common+0x100/0x258 | el0_svc_handler+0x48/0xc0 | el0_svc+0x8/0xc | | The buggy address belongs to the variable: | zero+0x0/0x40 | | Memory state around the buggy address: | ffff2000133d1b00: 00 00 00 00 00 00 00 00 fa fa fa fa 04 fa fa fa | ffff2000133d1b80: fa fa fa fa 04 fa fa fa fa fa fa fa 04 fa fa fa | >ffff2000133d1c00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00 | ^ | ffff2000133d1c80: fa fa fa fa 00 fa fa fa fa fa fa fa 00 00 00 00 | ffff2000133d1d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Fix the splat by introducing a unsigned long 'zero_ul' and using that instead. Link: http://lkml.kernel.org/r/20190403153409.17307-1-will.deacon@arm.com Fixes: 32a5ad9c2285 ("sysctl: handle overflow for file-max") Signed-off-by: Will Deacon Acked-by: Christian Brauner Cc: Kees Cook Cc: Alexey Dobriyan Cc: Matteo Croce Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge tag 'trace-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2019-04-05T23:15:57Z

Pull syscall-get-arguments cleanup and fixes from Steven Rostedt: "Andy Lutomirski approached me to tell me that the syscall_get_arguments() implementation in x86 was horrible and gcc certainly gets it wrong. He said that since the tracepoints only pass in 0 and 6 for i and n repectively, it should be optimized for that case. Inspecting the kernel, I discovered that all users pass in 0 for i and only one file passing in something other than 6 for the number of arguments. That code happens to be my own code used for the special syscall tracing. That can easily be converted to just using 0 and 6 as well, and only copying what is needed. Which is probably the faster path anyway for that case. Along the way, a couple of real fixes came from this as the syscall_get_arguments() function was incorrect for csky and riscv. x86 has been optimized to for the new interface that removes the variable number of arguments, but the other architectures could still use some loving and take more advantage of the simpler interface" * tag 'trace-5.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: syscalls: Remove start and number from syscall_set_arguments() args syscalls: Remove start and number from syscall_get_arguments() args csky: Fix syscall_get_arguments() and syscall_set_arguments() riscv: Fix syscall_get_arguments() and syscall_set_arguments() tracing/syscalls: Pass in hardcoded 6 into syscall_get_arguments() ptrace: Remove maxargs from task_current_syscall()

syscalls: Remove start and number from syscall_get_arguments() args

2019-04-05T13:26:43Z

At Linux Plumbers, Andy Lutomirski approached me and pointed out that the function call syscall_get_arguments() implemented in x86 was horribly written and not optimized for the standard case of passing in 0 and 6 for the starting index and the number of system calls to get. When looking at all the users of this function, I discovered that all instances pass in only 0 and 6 for these arguments. Instead of having this function handle different cases that are never used, simply rewrite it to return the first 6 arguments of a system call. This should help out the performance of tracing system calls by ptrace, ftrace and perf. Link: http://lkml.kernel.org/r/20161107213233.754809394@goodmis.org Cc: Oleg Nesterov Cc: Kees Cook Cc: Andy Lutomirski Cc: Dominik Brodowski Cc: Dave Martin Cc: "Dmitry V. Levin" Cc: x86@kernel.org Cc: linux-snps-arc@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: uclinux-h8-devel@lists.sourceforge.jp Cc: linux-hexagon@vger.kernel.org Cc: linux-ia64@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: nios2-dev@lists.rocketboards.org Cc: openrisc@lists.librecores.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-riscv@lists.infradead.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: linux-um@lists.infradead.org Cc: linux-xtensa@linux-xtensa.org Cc: linux-arch@vger.kernel.org Acked-by: Paul Burton # MIPS parts Acked-by: Max Filippov # For xtensa changes Acked-by: Will Deacon # For the arm64 bits Reviewed-by: Thomas Gleixner # for x86 Reviewed-by: Dmitry V. Levin Reported-by: Andy Lutomirski Signed-off-by: Steven Rostedt (VMware)

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2019-04-05T04:07:12Z

Pull networking fixes from David Miller: 1) Several hash table refcount fixes in batman-adv, from Sven Eckelmann. 2) Use after free in bpf_evict_inode(), from Daniel Borkmann. 3) Fix mdio bus registration in ixgbe, from Ivan Vecera. 4) Unbounded loop in __skb_try_recv_datagram(), from Paolo Abeni. 5) ila rhashtable corruption fix from Herbert Xu. 6) Don't allow upper-devices to be added to vrf devices, from Sabrina Dubroca. 7) Add qmi_wwan device ID for Olicard 600, from Bjørn Mork. 8) Don't leave skb->next poisoned in __netif_receive_skb_list_ptype, from Alexander Lobakin. 9) Missing IDR checks in mlx5 driver, from Aditya Pakki. 10) Fix false connection termination in ktls, from Jakub Kicinski. 11) Work around some ASPM issues with r8169 by disabling rx interrupt coalescing on certain chips. From Heiner Kallweit. 12) Properly use per-cpu qstat values on NOLOCK qdiscs, from Paolo Abeni. 13) Fully initialize sockaddr_in structures in SCTP, from Xin Long. 14) Various BPF flow dissector fixes from Stanislav Fomichev. 15) Divide by zero in act_sample, from Davide Caratti. 16) Fix bridging multicast regression introduced by rhashtable conversion, from Nikolay Aleksandrov. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (106 commits) ibmvnic: Fix completion structure initialization ipv6: sit: reset ip header pointer in ipip6_rcv net: bridge: always clear mcast matching struct on reports and leaves libcxgb: fix incorrect ppmax calculation vlan: conditional inclusion of FCoE hooks to match netdevice.h and bnx2x sch_cake: Make sure we can write the IP header before changing DSCP bits sch_cake: Use tc_skb_protocol() helper for getting packet protocol tcp: Ensure DCTCP reacts to losses net/sched: act_sample: fix divide by zero in the traffic path net: thunderx: fix NULL pointer dereference in nicvf_open/nicvf_stop net: hns: Fix sparse: some warnings in HNS drivers net: hns: Fix WARNING when remove HNS driver with SMMU enabled net: hns: fix ICMP6 neighbor solicitation messages discard problem net: hns: Fix probabilistic memory overwrite when HNS driver initialized net: hns: Use NAPI_POLL_WEIGHT for hns driver net: hns: fix KASAN: use-after-free in hns_nic_net_xmit_hw() flow_dissector: rst'ify documentation ipv6: Fix dangling pointer when ipv6 fragment net-gro: Fix GRO flush when receiving a GSO packet. flow_dissector: document BPF flow dissector environment ...

tracing/syscalls: Pass in hardcoded 6 into syscall_get_arguments()

2019-04-04T13:17:52Z

The only users that calls syscall_get_arguments() with a variable and not a hard coded '6' is ftrace_syscall_enter(). syscall_get_arguments() can be optimized by removing a variable input, and always grabbing 6 arguments regardless of what the system call actually uses. Change ftrace_syscall_enter() to pass the 6 args into a local stack array and copy the necessary arguments into the trace event as needed. This is needed to remove two parameters from syscall_get_arguments(). Link: http://lkml.kernel.org/r/20161107213233.627583542@goodmis.org Signed-off-by: Steven Rostedt (VMware)

signal: don't silently convert SI_USER signals to non-current pidfd

2019-04-01T21:03:18Z

The current sys_pidfd_send_signal() silently turns signals with explicit SI_USER context that are sent to non-current tasks into signals with kernel-generated siginfo. This is unlike do_rt_sigqueueinfo(), which returns -EPERM in this case. If a user actually wants to send a signal with kernel-provided siginfo, they can do that with pidfd_send_signal(pidfd, sig, NULL, 0); so allowing this case is unnecessary. Instead of silently replacing the siginfo, just bail out with an error; this is consistent with other interfaces and avoids special-casing behavior based on security checks. Fixes: 3eb39f47934f ("signal: add pidfd_send_signal() syscall") Signed-off-by: Jann Horn Signed-off-by: Christian Brauner

Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-03-31T15:22:12Z

Pull CPU hotplug fixes from Thomas Gleixner: "Two SMT/hotplug related fixes: - Prevent crash when HOTPLUG_CPU is disabled and the CPU bringup aborts. This is triggered with the 'nosmt' command line option, but can happen by any abort condition. As the real unplug code is not compiled in, prevent the fail by keeping the CPU in zombie state. - Enforce HOTPLUG_CPU for SMP on x86 to avoid the above situation completely. With 'nosmt' being a popular option it's required to unplug the half brought up sibling CPUs (due to the MCE wreckage) completely" * 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/smp: Enforce CONFIG_HOTPLUG_CPU when SMP=y cpu/hotplug: Prevent crash when CPU bringup fails on CONFIG_HOTPLUG_CPU=n

Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-03-31T14:47:21Z

Pull core fixes from Thomas Gleixner: "A small set of core updates: - Make the watchdog respect the selected CPU mask again. That was broken by the rework of the watchdog thread management and caused inconsistent state and NMI watchdog being unstoppable. - Ensure that the objtool build can find the libelf location. - Remove dead kcore stub code" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: watchdog: Respect watchdog cpumask on CPU hotplug objtool: Query pkg-config for libelf location proc/kcore: Remove unused kclist_add_remap()

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

2019-03-30T04:00:28Z

Daniel Borkmann says: ==================== pull-request: bpf 2019-03-29 The following pull-request contains BPF updates for your *net* tree. The main changes are: 1) Bug fix in BTF deduplication that was mishandling an equivalence comparison, from Andrii. 2) libbpf Makefile fixes to properly link against libelf for the shared object and to actually export AF_XDP's xsk.h header, from Björn. 3) Fix use after free in bpf inode eviction, from Daniel. 4) Fix a bug in skb creation out of cpumap redirect, from Jesper. 5) Remove an unnecessary and triggerable WARN_ONCE() in max number of call stack frames checking in verifier, from Paul. ==================== Signed-off-by: David S. Miller