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| author | Javier Carrasco <javier.carrasco.cruz@gmail.com> | 2023-10-14 05:11:33 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-10-14 05:17:02 +0200 |
| commit | 5c15c60e7be615f05a45cd905093a54b11f461bc (patch) | |
| tree | 5d69dab1991141d5ea7409dc545f2c7c5d61a47d /drivers/input/touchscreen/ad7879-i2c.c | |
| parent | Input: xpad - add PXN V900 support (diff) | |
| download | linux-5c15c60e7be615f05a45cd905093a54b11f461bc.tar.xz linux-5c15c60e7be615f05a45cd905093a54b11f461bc.zip | |
Input: powermate - fix use-after-free in powermate_config_complete
syzbot has found a use-after-free bug [1] in the powermate driver. This
happens when the device is disconnected, which leads to a memory free from
the powermate_device struct. When an asynchronous control message
completes after the kfree and its callback is invoked, the lock does not
exist anymore and hence the bug.
Use usb_kill_urb() on pm->config to cancel any in-progress requests upon
device disconnection.
[1] https://syzkaller.appspot.com/bug?extid=0434ac83f907a1dbdd1e
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Reported-by: syzbot+0434ac83f907a1dbdd1e@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/20230916-topic-powermate_use_after_free-v3-1-64412b81a7a2@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/touchscreen/ad7879-i2c.c')
0 files changed, 0 insertions, 0 deletions