diff options
| author | Dan Rosenberg <[email protected]> | 2010-09-28 18:18:20 +0000 |
|---|---|---|
| committer | Takashi Iwai <[email protected]> | 2010-09-28 19:33:16 +0000 |
| commit | 5591bf07225523600450edd9e6ad258bb877b779 (patch) | |
| tree | f886a48ec51861e74c79eca3052adeb9646d1534 /lib/dynamic_debug.c | |
| parent | ALSA: sound/pci/rme9652: prevent reading uninitialized stack memory (diff) | |
| download | kernel-5591bf07225523600450edd9e6ad258bb877b779.tar.gz kernel-5591bf07225523600450edd9e6ad258bb877b779.zip | |
ALSA: prevent heap corruption in snd_ctl_new()
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 <[email protected]>
Cc: <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
Diffstat (limited to 'lib/dynamic_debug.c')
0 files changed, 0 insertions, 0 deletions