diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2020-05-01 12:40:11 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-05-01 12:25:49 +0200 |
| commit | 7f0d5053c5a9d23fe5c2d337495a9d79038d267b (patch) | |
| tree | 33deaf6b3ec97c70419f47bc3fcece72baf0747f | |
| parent | 0127f59794b39debf2daf3c7ff755236630198ed (diff) | |
ALSA: isa/wavefront: prevent out of bounds write in ioctl
The "header->number" comes from the ioctl and it needs to be clamped to
prevent out of bounds writes.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200501094011.GA960082@mwanda
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/isa/wavefront/wavefront_synth.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sound/isa/wavefront/wavefront_synth.c b/sound/isa/wavefront/wavefront_synth.c index c5b1d5900eed..d6420d224d09 100644 --- a/sound/isa/wavefront/wavefront_synth.c +++ b/sound/isa/wavefront/wavefront_synth.c @@ -1171,7 +1171,10 @@ wavefront_send_alias (snd_wavefront_t *dev, wavefront_patch_info *header) "alias for %d\n", header->number, header->hdr.a.OriginalSample); - + + if (header->number >= WF_MAX_SAMPLE) + return -EINVAL; + munge_int32 (header->number, &alias_hdr[0], 2); munge_int32 (header->hdr.a.OriginalSample, &alias_hdr[2], 2); munge_int32 (*((unsigned int *)&header->hdr.a.sampleStartOffset), @@ -1202,6 +1205,9 @@ wavefront_send_multisample (snd_wavefront_t *dev, wavefront_patch_info *header) int num_samples; unsigned char *msample_hdr; + if (header->number >= WF_MAX_SAMPLE) + return -EINVAL; + msample_hdr = kmalloc(WF_MSAMPLE_BYTES, GFP_KERNEL); if (! msample_hdr) return -ENOMEM; |