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| author |   Thomas Gleixner <tglx@linutronix.de> | 2016-12-26 22:58:20 +0100 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-26 17:30:24 -0800 |
| commit | 0dad3a3014a0b9e72521ff44f17e0054f43dcdea (patch) | |
| tree | 6122a01208f56efd2766697a265ba559cbbbb452 /arch | |
| parent | smp/hotplug: Undo tglxs brainfart (diff) | |
| download | linux-dev-0dad3a3014a0b9e72521ff44f17e0054f43dcdea.tar.xz linux-dev-0dad3a3014a0b9e72521ff44f17e0054f43dcdea.zip | |
x86/mce/AMD: Make the init code more robust
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>
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 ffacfdcacb85..a5fd137417a2 100644 --- a/arch/x86/kernel/cpu/mcheck/mce_amd.c +++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c @@ -1182,6 +1182,9 @@ static int threshold_create_bank(unsigned int cpu, unsigned int bank) const char *name = get_name(bank, NULL); int err = 0; + if (!dev) + return -ENODEV; + if (is_shared_bank(bank)) { nb = node_to_amd_nb(amd_get_nb_id(cpu)); |