From 82e68f7ffec3800425f2391c8c86277606860442 Mon Sep 17 00:00:00 2001 From: Willy Tarreau Date: Sat, 2 Aug 2008 18:25:16 +0200 Subject: [PATCH] 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 Acked-and-tested-by: Takashi Iwai Cc: stable@kernel.org Signed-off-by: Willy Tarreau Signed-off-by: Linus Torvalds --- sound/core/seq/oss/seq_oss_synth.c | 3 +++ 1 file changed, 3 insertions(+) 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);