WARNING: lock held when returning to user space in sock

WARNING: lock held when returning to user space in sock_setsockopt

Status: fixed on 2021/11/10 00:50
Subsystems: net
[Documentation on labels]
Fix commit: 271dbc318432 sock: unlock on error in sock_setsockopt()
First crash: 1030d, last: 1030d

Sample crash report:

================================================
WARNING: lock held when returning to user space!
5.13.0-syzkaller #0 Not tainted
------------------------------------------------
syz-executor.5/24852 is leaving the kernel with locks still held!
1 lock held by syz-executor.5/24852:
 #0: ffff88807f934220 (sk_lock-AF_TIPC){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1613 [inline]
 #0: ffff88807f934220 (sk_lock-AF_TIPC){+.+.}-{0:0}, at: sock_setsockopt+0x1e3/0x2490 net/core/sock.c:980

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2021/07/06 02:29	net-old	c6c205ed442e	55aa55c2	.config	console log	report			info		ci-upstream-net-this-kasan-gce	WARNING: lock held when returning to user space in sock_setsockopt

* ~~Struck through~~ repros no longer work on HEAD.