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(parent: 408133e) | patch
ARM: 6891/1: prevent heap corruption in OABI semtimedop
authorDan Rosenberg <drosenberg@vsecurity.com>
Fri, 29 Apr 2011 14:48:07 +0000 (15:48 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Fri, 29 Apr 2011 14:53:14 +0000 (15:53 +0100)
commit0f22072ab50cac7983f9660d33974b45184da4f9
tree59c175c63787b9b0424c40064df02cda7fe72a24tree | snapshot
parent408133e9dca2b94c64b917b144ec816df913a94ecommit | diff
ARM: 6891/1: prevent heap corruption in OABI semtimedop

When CONFIG_OABI_COMPAT is set, the wrapper for semtimedop does not
bound the nsops argument.  A sufficiently large value will cause an
integer overflow in allocation size, followed by copying too much data
into the allocated buffer.  Fix this by restricting nsops to SEMOPM.
Untested.

Cc: stable@kernel.org
Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/kernel/sys_oabi-compat.c diff | blob | history
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