linux/arch
Will Deacon 42309ab450 ARM: 8087/1: ptrace: reload syscall number after secure_computing() check
On the syscall tracing path, we call out to secure_computing() to allow
seccomp to check the syscall number being attempted. As part of this, a
SIGTRAP may be sent to the tracer and the syscall could be re-written by
a subsequent SET_SYSCALL ptrace request. Unfortunately, this new syscall
is ignored by the current code unless TIF_SYSCALL_TRACE is also set on
the current thread.

This patch slightly reworks the enter path of the syscall tracing code
so that we always reload the syscall number from
current_thread_info()->syscall after the potential ptrace traps.

Acked-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-06-29 10:29:35 +01:00
..
alpha Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
arc Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
arm ARM: 8087/1: ptrace: reload syscall number after secure_computing() check 2014-06-29 10:29:35 +01:00
arm64 Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
avr32 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next 2014-06-03 12:57:53 -07:00
blackfin blackfin updates for Linux 3.16 2014-06-12 20:08:47 -07:00
c6x DeviceTree for 3.16: 2014-06-04 10:02:38 -07:00
cris cris: update comments for generic idle conversion 2014-06-06 16:08:18 -07:00
frv sys_sgetmask/sys_ssetmask: add CONFIG_SGETMASK_SYSCALL 2014-06-04 16:54:14 -07:00
hexagon
ia64 Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
m32r
m68k Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
metag Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
microblaze Microblaze patches for 3.16-rc1 2014-06-05 16:15:33 -07:00
mips Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
mn10300 sys_sgetmask/sys_ssetmask: add CONFIG_SGETMASK_SYSCALL 2014-06-04 16:54:14 -07:00
openrisc DeviceTree for 3.16: 2014-06-04 10:02:38 -07:00
parisc Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
powerpc Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2014-06-12 21:23:38 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
score
sh Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
sparc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
tile Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
um Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2014-06-12 21:23:38 -07:00
unicore32 arch/unicore32/mm/ioremap.c: return NULL on invalid pfn 2014-06-04 16:53:53 -07:00
x86 Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-06-14 14:46:29 -07:00
xtensa Merge commit '3cf2f34' into sched/core, to fix build error 2014-06-12 13:46:37 +02:00
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