diff options
| author | Kangjie Lu <kjlu@umn.edu> | 2019-03-14 23:04:14 -0500 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-03-16 10:30:27 +0100 |
| commit | dcd0feac9bab901d5739de51b3f69840851f8919 (patch) | |
| tree | e1bc92dec112b1add9d62e0e47c7ddba048af90b | |
| parent | 6ade657d6125ec3ec07f95fa51e28138aef6208f (diff) | |
| download | linux-dcd0feac9bab901d5739de51b3f69840851f8919.tar.bz2 | |
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>
| -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], |