commit: c2fd22df89365df9451d5b91da3b7bfd48122ecd From: Michael Neuling <[email protected]> Date: Thu, 2 May 2013 15:36:14 +0000 Subject: powerpc/tm: Fix null pointer deference in flush_hash_page
Make sure that current->thread.reg exists before we deference it in flush_hash_page. Signed-off-by: Michael Neuling <[email protected]> Reported-by: John J Miller <[email protected]> Cc: <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]> --- arch/powerpc/mm/hash_utils_64.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 3e4c4ed..88ac0ee 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -1230,6 +1230,7 @@ void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize, int ssize, * unmapping it first, it may see the speculated version. */ if (local && cpu_has_feature(CPU_FTR_TM) && + current->thread.regs && MSR_TM_ACTIVE(current->thread.regs->msr)) { tm_enable(); tm_abort(TM_CAUSE_TLBI); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
