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| author | Willy Tarreau <w@1wt.eu> | 2008-08-02 18:25:16 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-04 17:03:26 -0700 |
| commit | 82e68f7ffec3800425f2391c8c86277606860442 (patch) | |
| tree | dd0133edc67252f786d16541a7475dfe52b845d8 /sound | |
| parent | 82248a5e92793014d156a12dbcbba633794ce9f8 (diff) | |
| download | linux-82e68f7ffec3800425f2391c8c86277606860442.tar.gz linux-82e68f7ffec3800425f2391c8c86277606860442.tar.bz2 linux-82e68f7ffec3800425f2391c8c86277606860442.zip | |
sound: ensure device number is valid in snd_seq_oss_synth_make_info
snd_seq_oss_synth_make_info() incorrectly reports information
to userspace without first checking for the validity of the
device number, leading to possible information leak (CVE-2008-3272).
Reported-By: Tobias Klein <tk@trapkit.de>
Acked-and-tested-by: Takashi Iwai <tiwai@suse.de>
Cc: stable@kernel.org
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/core/seq/oss/seq_oss_synth.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/core/seq/oss/seq_oss_synth.c b/sound/core/seq/oss/seq_oss_synth.c index 558dadbf45f1..e024e4588b82 100644 --- a/sound/core/seq/oss/seq_oss_synth.c +++ b/sound/core/seq/oss/seq_oss_synth.c @@ -604,6 +604,9 @@ snd_seq_oss_synth_make_info(struct seq_oss_devinfo *dp, int dev, struct synth_in { struct seq_oss_synth *rec; + if (dev < 0 || dev >= dp->max_synthdev) + return -ENXIO; + if (dp->synths[dev].is_midi) { struct midi_info minf; snd_seq_oss_midi_make_info(dp, dp->synths[dev].midi_mapped, &minf); |