ALSA: hda - fix use-after-free after module unload

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commit ab58d8cc87 upstream.

register_vga_switcheroo() sets the PM ops from the hda structure which
is freed later in azx_free. Make sure that these ops are cleared.

Caught by KASAN, initially noticed due to a general protection fault.

Fixes: 246efa4a07 ("snd/hda: add runtime suspend/resume on optimus support (v4)")
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Peter Wu 2016-07-11 19:51:06 +02:00 • committed by Greg Kroah-Hartman

parent f4ccc29f5b

commit d5c1296401

1 changed files with 3 additions and 1 deletions

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sound/pci/hda/hda_intel.c

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