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| author | Takashi Iwai <tiwai@suse.de> | 2017-10-17 14:38:55 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-27 08:38:07 (GMT) |
| commit | 57ed31530cf929c754476c207db8c72edb228c5a (patch) | |
| tree | 5bfaf52e5629ee8ae07f4ce8f74f06e161ad14a2 /drivers | |
| parent | d0f5c17fd414278c5303f223483e834638ad1766 (diff) | |
| download | linux-57ed31530cf929c754476c207db8c72edb228c5a.tar.xz | |
ALSA: hda: Abort capability probe at invalid register read
commit 098a0a62c1554f5a3813ef1b8539563214ada8f6 upstream.
The loop in snd_hdac_bus_parse_capabilities() may go to nirvana when
it hits an invalid register value read:
BUG: unable to handle kernel paging request at ffffad5dc41f3fff
IP: pci_azx_readl+0x5/0x10 [snd_hda_intel]
Call Trace:
snd_hdac_bus_parse_capabilities+0x3c/0x1f0 [snd_hda_core]
azx_probe_continue+0x7d5/0x940 [snd_hda_intel]
.....
This happened on a new Intel machine, and we need to check the value
and abort the loop accordingly.
[Note: the fixes tag below indicates only the commit where this patch
can be applied; the original problem was introduced even before that
commit]
Fixes: 6720b38420a0 ("ALSA: hda - move bus_parse_capabilities to core")
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions