ALSA: hda: Check snd_hda_power_pm construct error before executing verb

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When userspace writes 1 to /sys/bus/pci/devices/XX/remove to remove
HDA PCI device, the HDA hardware control path is shut down and devres
unmaps the BAR virtual address bus->remap_addr automatically during
driver removal.

If a delayed HDA verb command arrives after the MMIO region is
unmapped, the driver will access invalid virtual addresses and trigger
a page fault splat.

So add an error check right after constructing snd_hda_power_pm.

Signed-off-by: Bob Song <songxiebing@kylinos.cn>
Link: https://patch.msgid.link/20260717024948.506335-1-songxiebing@kylinos.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Bob Song 2026-07-17 10:49:48 +08:00 • committed by Takashi Iwai

parent 260fc7a0fe

commit df27e4dc80

1 changed files with 6 additions and 0 deletions

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sound/hda/common/codec.c

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