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| author | Zheyu Ma <zheyuma97@gmail.com> | 2022-07-15 04:05:15 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2022-07-15 09:58:36 +0300 |
| commit | ffb2759df7efbc00187bfd9d1072434a13a54139 (patch) | |
| tree | 639c5d14c47b0c968d822cfb9df1c0cf7285ba0f /include | |
| parent | 63f4b99f0089a9719aa4441015fe30ff4b6f10e5 (diff) | |
| download | linux-ffb2759df7efbc00187bfd9d1072434a13a54139.tar.xz | |
ALSA: bcd2000: Fix a UAF bug on the error path of probing
When the driver fails in snd_card_register() at probe time, it will free
the 'bcd2k->midi_out_urb' before killing it, which may cause a UAF bug.
The following log can reveal it:
[ 50.727020] BUG: KASAN: use-after-free in bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000]
[ 50.727623] Read of size 8 at addr ffff88810fab0e88 by task swapper/4/0
[ 50.729530] Call Trace:
[ 50.732899] bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000]
Fix this by adding usb_kill_urb() before usb_free_urb().
Fixes: b47a22290d58 ("ALSA: MIDI driver for Behringer BCD2000 USB device")
Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220715010515.2087925-1-zheyuma97@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions