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| author | Dan Rosenberg <drosenberg@vsecurity.com> | 2010-09-28 14:18:20 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-28 21:43:53 -0700 |
| commit | 08f00ae28f93b85bd7dccdd3ace606939a970833 (patch) | |
| tree | be75fc70744721f323a9b4593d40ef457541be4d /block/deadline-iosched.c | |
| parent | 3bcf8d58ffc47e78c9c52490455c810befa97e75 (diff) | |
ALSA: prevent heap corruption in snd_ctl_new()
commit 5591bf07225523600450edd9e6ad258bb877b779 upstream.
The snd_ctl_new() function in sound/core/control.c allocates space for a
snd_kcontrol struct by performing arithmetic operations on a
user-provided size without checking for integer overflow. If a user
provides a large enough size, an overflow will occur, the allocated
chunk will be too small, and a second user-influenced value will be
written repeatedly past the bounds of this chunk. This code is
reachable by unprivileged users who have permission to open
a /dev/snd/controlC* device (on many distros, this is group "audio") via
the SNDRV_CTL_IOCTL_ELEM_ADD and SNDRV_CTL_IOCTL_ELEM_REPLACE ioctls.
Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'block/deadline-iosched.c')
0 files changed, 0 insertions, 0 deletions