2.6.35-longterm review patch. If anyone has any objections, please let me know.
------------------ From: Dan Rosenberg <[email protected]> commit 0f22072ab50cac7983f9660d33974b45184da4f9 upstream. 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. Signed-off-by: Dan Rosenberg <[email protected]> Signed-off-by: Russell King <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Andi Kleen <[email protected]> --- arch/arm/kernel/sys_oabi-compat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-2.6.35.y/arch/arm/kernel/sys_oabi-compat.c =================================================================== --- linux-2.6.35.y.orig/arch/arm/kernel/sys_oabi-compat.c +++ linux-2.6.35.y/arch/arm/kernel/sys_oabi-compat.c @@ -311,7 +311,7 @@ asmlinkage long sys_oabi_semtimedop(int long err; int i; - if (nsops < 1) + if (nsops < 1 || nsops > SEMOPM) return -EINVAL; sops = kmalloc(sizeof(*sops) * nsops, GFP_KERNEL); if (!sops) _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
