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| author | Kangjie Lu <kjlu@umn.edu> | 2019-03-15 07:04:14 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-20 10:07:47 +0300 |
| commit | 5e6e33fd757714e76d7abeddac125547bb2cf20d (patch) | |
| tree | b4c30bdffe28a0cddc5befece368e2f6fabc4b0e /sound | |
| parent | a3e47ff19026e6f11df466ae4325e51b985bcc47 (diff) | |
| download | linux-5e6e33fd757714e76d7abeddac125547bb2cf20d.tar.xz | |
ALSA: sb8: add a check for request_region
[ Upstream commit dcd0feac9bab901d5739de51b3f69840851f8919 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'sound')
| -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 ad42d2364199..e75bfc511e3e 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], |