ARM: 7579/1: arch/allow a scno of -1 to not cause a SIGILL

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On tracehook-friendly platforms, a system call number of -1 falls
through without running much code or taking much action.

ARM is different. This adds a short-circuit check in the trace path to
avoid any additional work, as suggested by Russell King, to make sure
that ARM behaves the same way as other platforms.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Will Drewry <wad@chromium.org>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Kees Cook 2012-11-15 22:12:17 +01:00 • committed by Russell King

parent 9b790d71d5

commit ad75b51459

1 changed files with 4 additions and 1 deletions

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arch/arm/kernel/entry-common.S

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