diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2016-12-26 22:58:20 +0100 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-09-10 16:35:52 -0400 |
| commit | f1d27cbc81baf9e258aeb1442d6397a3513377be (patch) | |
| tree | 1e44fad28d9df18232d5dc1a1b0b607c321e42a4 /arch | |
| parent | 12604511d943aa9dbf3152c15bfbfc543c12925d (diff) | |
x86/mce/AMD: Make the init code more robust
[ Upstream commit 0dad3a3014a0b9e72521ff44f17e0054f43dcdea ]
If mce_device_init() fails then the mce device pointer is NULL and the
AMD mce code happily dereferences it.
Add a sanity check.
Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Reported-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce_amd.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c index df61c2d0cb56..bd7e7d6c29c5 100644 --- a/arch/x86/kernel/cpu/mcheck/mce_amd.c +++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c @@ -581,6 +581,9 @@ static int threshold_create_bank(unsigned int cpu, unsigned int bank) const char *name = th_names[bank]; int err = 0; + if (!dev) + return -ENODEV; + if (is_shared_bank(bank)) { nb = node_to_amd_nb(amd_get_nb_id(cpu)); |