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| author | Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> | 2021-09-21 22:06:23 +0900 |
|---|---|---|
| committer | Kalle Valo <quic_kvalo@quicinc.com> | 2021-12-20 18:08:57 +0200 |
| commit | b0ec7e55fce65f125bd1d7f02e2dc4de62abee34 (patch) | |
| tree | ccbc5181d25d59c5fbb65b19ef7f4320f1aa444c /lib/mpi/ec.c | |
| parent | 01e782c891083f1847c0b62902bfe3c2812566c6 (diff) | |
ath9k_htc: fix NULL pointer dereference at ath9k_htc_rxep()
syzbot is reporting lockdep warning followed by kernel panic at
ath9k_htc_rxep() [1], for ath9k_htc_rxep() depends on ath9k_rx_init()
being already completed.
Since ath9k_htc_rxep() is set by ath9k_htc_connect_svc(WMI_BEACON_SVC)
from ath9k_init_htc_services(), it is possible that ath9k_htc_rxep() is
called via timer interrupt before ath9k_rx_init() from ath9k_init_device()
is called.
Since we can't call ath9k_init_device() before ath9k_init_htc_services(),
let's hold ath9k_htc_rxep() no-op until ath9k_rx_init() completes.
Link: https://syzkaller.appspot.com/bug?extid=4d2d56175b934b9a7bf9 [1]
Reported-by: syzbot <syzbot+4d2d56175b934b9a7bf9@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Tested-by: syzbot <syzbot+4d2d56175b934b9a7bf9@syzkaller.appspotmail.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/2b88f416-b2cb-7a18-d688-951e6dc3fe92@i-love.sakura.ne.jp
Diffstat (limited to 'lib/mpi/ec.c')
0 files changed, 0 insertions, 0 deletions