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| author | Willy Tarreau <w@1wt.eu> | 2008-08-05 00:20:03 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-08-06 16:03:27 (GMT) |
| commit | ee3b94e26df9e2903add812f7f43cdcdc2ed5288 (patch) (unidiff) | |
| tree | f471243d3db392fdbab6fb79e83bc593b0d470b7 | |
| parent | 8256c73d4fab8b3b019b7a21974252854d6deb68 (diff) | |
sound: ensure device number is valid in snd_seq_oss_synth_make_info
commit 82e68f7ffec3800425f2391c8c86277606860442 upstream
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 558dadb..e024e45 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 | |||
| 604 | { | 604 | { |
| 605 | struct seq_oss_synth *rec; | 605 | struct seq_oss_synth *rec; |
| 606 | 606 | ||
| 607 | if (dev < 0 || dev >= dp->max_synthdev) | ||
| 608 | return -ENXIO; | ||
| 609 | |||
| 607 | if (dp->synths[dev].is_midi) { | 610 | if (dp->synths[dev].is_midi) { |
| 608 | struct midi_info minf; | 611 | struct midi_info minf; |
| 609 | snd_seq_oss_midi_make_info(dp, dp->synths[dev].midi_mapped, &minf); | 612 | snd_seq_oss_midi_make_info(dp, dp->synths[dev].midi_mapped, &minf); |