pm24.git/arch/um/kernel, branch v3.18

Merge git://git.infradead.org/users/eparis/audit

2014-10-19T23:25:56Z

Pull audit updates from Eric Paris: "So this change across a whole bunch of arches really solves one basic problem. We want to audit when seccomp is killing a process. seccomp hooks in before the audit syscall entry code. audit_syscall_entry took as an argument the arch of the given syscall. Since the arch is part of what makes a syscall number meaningful it's an important part of the record, but it isn't available when seccomp shoots the syscall... For most arch's we have a better way to get the arch (syscall_get_arch) So the solution was two fold: Implement syscall_get_arch() everywhere there is audit which didn't have it. Use syscall_get_arch() in the seccomp audit code. Having syscall_get_arch() everywhere meant it was a useless flag on the stack and we could get rid of it for the typical syscall entry. The other changes inside the audit system aren't grand, fixed some records that had invalid spaces. Better locking around the task comm field. Removing some dead functions and structs. Make some things static. Really minor stuff" * git://git.infradead.org/users/eparis/audit: (31 commits) audit: rename audit_log_remove_rule to disambiguate for trees audit: cull redundancy in audit_rule_change audit: WARN if audit_rule_change called illegally audit: put rule existence check in canonical order next: openrisc: Fix build audit: get comm using lock to avoid race in string printing audit: remove open_arg() function that is never used audit: correct AUDIT_GET_FEATURE return message type audit: set nlmsg_len for multicast messages. audit: use union for audit_field values since they are mutually exclusive audit: invalid op= values for rules audit: use atomic_t to simplify audit_serial() kernel/audit.c: use ARRAY_SIZE instead of sizeof/sizeof[0] audit: reduce scope of audit_log_fcaps audit: reduce scope of audit_net_id audit: arm64: Remove the audit arch argument to audit_syscall_entry arm64: audit: Add audit hook in syscall_trace_enter/exit() audit: x86: drop arch from __audit_syscall_entry() interface sparc: implement is_32bit_task sparc: properly conditionalize use of TIF_32BIT ...

um: Add support for CONFIG_STACKTRACE

2014-10-13T19:46:25Z

Add stacktrace support for User Mode Linux Signed-off-by: Daniel Walter Signed-off-by: Richard Weinberger

um: delete unnecessary bootmem struct page array

2014-10-13T15:15:09Z

1) uml kernel bootmem managed through bootmem_data->node_bootmem_map, not the struct page array, so the array is unnecessary. 2) the bootmem struct page array has been pointed by a *local* pointer, struct page *map, in init_maps function. The array can be accessed only in init_maps's scope. As a result, uml kernel wastes about 1% of total memory. Signed-off-by: Honggang Li Signed-off-by: Richard Weinberger

ARCH: AUDIT: audit_syscall_entry() should not require the arch

2014-09-23T20:21:26Z

We have a function where the arch can be queried, syscall_get_arch(). So rather than have every single piece of arch specific code use and/or duplicate syscall_get_arch(), just have the audit code use the syscall_get_arch() code. Based-on-patch-by: Richard Briggs Signed-off-by: Eric Paris Cc: linux-alpha@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-ia64@vger.kernel.org Cc: microblaze-uclinux@itee.uq.edu.au Cc: linux-mips@linux-mips.org Cc: linux@lists.openrisc.net Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: user-mode-linux-devel@lists.sourceforge.net Cc: linux-xtensa@linux-xtensa.org Cc: x86@kernel.org

um: Use get_signal() signal_setup_done()

2014-08-06T11:03:41Z

Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger

um: segv: Save regs only in case of a kernel mode fault

2014-07-20T11:39:27Z

...otherwise me lose user mode regs and the resulting stack trace is useless. Signed-off-by: Richard Weinberger

um: Fix hung task in fix_range_common()

2014-07-20T11:16:20Z

If do_ops() fails we have to release current->mm->mmap_sem otherwise the failing task will never terminate. Reported-by: Toralf Förster Signed-off-by: Richard Weinberger

um: Ensure that a stub page cannot get unmapped

2014-07-20T11:09:15Z

Trinity discovered an execution path such that a task can unmap his stub page. Reported-by: Toralf Förster Signed-off-by: Richard Weinberger

um: Memory corruption on startup

2014-04-20T21:57:21Z

The reverse case of this race (you must msync before read) is well known. This is the not so common one. It can be triggered only on systems which do a lot of task switching and only at UML startup. If you are starting 200+ UMLs ~ 0.5% will always die without this fix. Signed-off-by: Anton Ivanov [rw: minor whitespace fixes] Signed-off-by: Richard Weinberger

asm/system.h: um: arch_align_stack() moved to asm/exec.h

2014-04-07T23:36:12Z

arch_align_stack() moved to asm/exec.h, so change the comment referring to asm/system.h which no longer exists. Signed-off-by: David Howells Cc: Jeff Dike Cc: Richard Weinberger Cc: Arnd Bergmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds