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| author | Zheyu Ma <[email protected]> | 2022-07-15 09:05:15 +0800 |
|---|---|---|
| committer | Takashi Iwai <[email protected]> | 2022-07-15 08:58:36 +0200 |
| commit | ffb2759df7efbc00187bfd9d1072434a13a54139 (patch) | |
| tree | 639c5d14c47b0c968d822cfb9df1c0cf7285ba0f /scripts/gdb/linux/tasks.py | |
| parent | 63f4b99f0089a9719aa4441015fe30ff4b6f10e5 (diff) | |
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 <[email protected]>
Cc: <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
Diffstat (limited to 'scripts/gdb/linux/tasks.py')
0 files changed, 0 insertions, 0 deletions