In the Linux kernel, the following vulnerability has been resolved:
tcp: Fix out-of-bounds access for twsk in tcp_ao_established_key().
lockdep_sock_is_held() was added in tcp_ao_established_key()
by the cited commit.
It can be called from tcp_v[46]_timewait_ack() with twsk.
Since it does not have sk->sk_lock, the lockdep annotation
results in out-of-bound access.
$ pahole -C tcp_timewait_sock vmlinux | grep size
/* size: 288, cachelines: 5, members: 8 */
$ pahole -C sock vmlinux | grep sk_lock
socket_lock_t sk_lock; /* 440 192 */
Let's not use lockdep_sock_is_held() for TCP_TIME_WAIT.
References 4
https://git.kernel.org/stable/c/03cb001ef87b3f8d859cf7f96329acf3d6235d29
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/29cf64d128c94cf98d1c69d8b2962d39db5ff4c6
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/510db031ba6eb40134f84c90ef963ea4b6dfb878
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/87bb3e719042f0030a6dad39118c6a6b2a491ad9
416baaa9-dc9f-4396-8d5f-8c081fb06d67