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| author | Peter Wu <peter@lekensteyn.nl> | 2016-07-11 19:51:06 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-07-27 08:42:23 -0700 |
| commit | 4c9e14a2c1990e6ab55fbe11d800094ed57e886e (patch) | |
| tree | 4dff65bff818c98fd82c1d1a0a53783df133c5d1 | |
| parent | 179f54fee5728e7f33587ffcde329ab5c6e56c3f (diff) | |
| download | linux-stable-4c9e14a2c1990e6ab55fbe11d800094ed57e886e.tar.gz linux-stable-4c9e14a2c1990e6ab55fbe11d800094ed57e886e.tar.bz2 linux-stable-4c9e14a2c1990e6ab55fbe11d800094ed57e886e.zip | |
ALSA: hda - fix use-after-free after module unload
commit ab58d8cc870ef3f0771c197700441936898d1f1d 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: 246efa4a072f ("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>
| -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) { |