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| author | Michael Neuling <mikey@neuling.org> | 2013-05-02 19:36:14 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-05-06 03:25:36 +0400 |
| commit | c2fd22df89365df9451d5b91da3b7bfd48122ecd (patch) | |
| tree | 2676c8f281258275506b9a6e079d6aca38a23537 /arch/powerpc/mm/hash_utils_64.c | |
| parent | c4463b3738181f46cf0e4675841d039f3662caf9 (diff) | |
| download | linux-c2fd22df89365df9451d5b91da3b7bfd48122ecd.tar.xz | |
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 <mikey@neuling.org>
Reported-by: John J Miller <millerjo@us.ibm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/hash_utils_64.c')
| -rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 3e4c4ed19335..88ac0eeaadde 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); |