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| author | Kangjie Lu <kjlu@umn.edu> | 2019-03-15 05:04:14 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-03-16 10:30:27 +0100 |
| commit | dcd0feac9bab901d5739de51b3f69840851f8919 (patch) | |
| tree | e1bc92dec112b1add9d62e0e47c7ddba048af90b /sound/isa/sb/sb8.c | |
| parent | ALSA: echoaudio: add a check for ioremap_nocache (diff) | |
| download | linux-dcd0feac9bab901d5739de51b3f69840851f8919.tar.xz linux-dcd0feac9bab901d5739de51b3f69840851f8919.zip | |
ALSA: sb8: add a check for request_region
In case request_region fails, the fix returns an error code to
avoid NULL pointer dereference.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/isa/sb/sb8.c')
| -rw-r--r-- | sound/isa/sb/sb8.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/isa/sb/sb8.c b/sound/isa/sb/sb8.c index aa2a83eb81a9..dc27a480c2d9 100644 --- a/sound/isa/sb/sb8.c +++ b/sound/isa/sb/sb8.c @@ -111,6 +111,10 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev) /* block the 0x388 port to avoid PnP conflicts */ acard->fm_res = request_region(0x388, 4, "SoundBlaster FM"); + if (!acard->fm_res) { + err = -EBUSY; + goto _err; + } if (port[dev] != SNDRV_AUTO_PORT) { if ((err = snd_sbdsp_create(card, port[dev], irq[dev], |