WARNING in tcf_chain0_head_change_cb

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in tcf_chain0_head_change_cb_del net				1	1402d	1397d	0/26	auto-closed as invalid on 2020/10/15 17:21
upstream	WARNING in tcf_chain0_head_change_cb_del (3) net	C	inconclusive		107	856d	992d	20/26	fixed on 2022/03/08 16:11

0 pages HighMem/MovableOnly 160514 pages reserved 0 pages cma reserved ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(lock->magic != lock) WARNING: CPU: 1 PID: 18525 at kernel/locking/mutex.c:938 __mutex_lock_common kernel/locking/mutex.c:938 [inline] WARNING: CPU: 1 PID: 18525 at kernel/locking/mutex.c:938 __mutex_lock+0xc06/0x1110 kernel/locking/mutex.c:1103 Modules linked in: CPU: 1 PID: 18525 Comm: syz-executor.1 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:938 [inline] RIP: 0010:__mutex_lock+0xc06/0x1110 kernel/locking/mutex.c:1103 Code: 08 84 d2 0f 85 a3 04 00 00 8b 05 9d 9d a6 04 85 c0 0f 85 12 f5 ff ff 48 c7 c6 80 9e 4b 89 48 c7 c7 40 9c 4b 89 e8 fa 43 bd ff <0f> 0b e9 f8 f4 ff ff 65 48 8b 1c 25 00 f0 01 00 be 08 00 00 00 48 RSP: 0018:ffffc900055af260 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815b7455 RDI: fffff52000ab5e3e RBP: ffff888072f88000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815b05fe R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc900055af440 R15: 0000000080810000 FS: 00007fe267e3e700(0000) GS:ffff88802ca00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f250929240 CR3: 000000006d425000 CR4: 0000000000150ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcf_chain0_head_change_cb_del+0x2e/0x3d0 net/sched/cls_api.c:809 tcf_block_put_ext net/sched/cls_api.c:1380 [inline] tcf_block_put_ext net/sched/cls_api.c:1375 [inline] tcf_block_put+0xbc/0x130 net/sched/cls_api.c:1393 cake_destroy+0x3f/0x80 net/sched/sch_cake.c:2691 qdisc_create+0xc82/0x1270 net/sched/sch_api.c:1296 tc_modify_qdisc+0x4c8/0x1990 net/sched/sch_api.c:1663 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5553 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2345 ___sys_sendmsg+0xf3/0x170 net/socket.c:2399 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe267e3e188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007fe267e3e1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007fffa8c7dbff R14: 00007fe267e3e300 R15: 0000000000022000