diff options
| author | Peter Wu <peter@lekensteyn.nl> | 2016-07-11 19:51:06 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2016-07-11 20:07:46 +0200 |
| commit | ab58d8cc870ef3f0771c197700441936898d1f1d (patch) | |
| tree | 41f7edec506cd28202c41de3637337e0d8dfcf8d /sound | |
| parent | ALSA: pcm: Free chmap at PCM free callback, too (diff) | |
| download | linux-ab58d8cc870ef3f0771c197700441936898d1f1d.tar.xz linux-ab58d8cc870ef3f0771c197700441936898d1f1d.zip | |
ALSA: hda - fix use-after-free after module unload
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: 246efa4a072f ("snd/hda: add runtime suspend/resume on optimus support (v4)")
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index e320c44714b1..7c9b06bf2896 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1218,8 +1218,10 @@ static int azx_free(struct azx *chip) if (use_vga_switcheroo(hda)) { if (chip->disabled && hda->probe_continued) snd_hda_unlock_devices(&chip->bus); - if (hda->vga_switcheroo_registered) + if (hda->vga_switcheroo_registered) { vga_switcheroo_unregister_client(chip->pci); + vga_switcheroo_fini_domain_pm_ops(chip->card->dev); + } } if (bus->chip_init) { |