RBP: 00007f1ccd44fb20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1ccd63f038 R14: 00007f1ccd63efa0 R15: 00007ffc0b485bd8
watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.1.1043:4631]
Modules linked in:
CPU: 0 PID: 4631 Comm: syz.1.1043 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x82/0x90 kernel/kcov.c:277
Code: 8d 50 28 4d 39 ca 77 22 89 ff 89 f6 4a c7 44 01 08 05 00 00 00 4a 89 7c 01 10 4a 89 74 01 18 4a 89 44 01 20 48 ff c2 48 89 11 <5d> c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 48 89 e5 48 8b 45 08
RSP: 0018:ffffc900012e6ed8 EFLAGS: 00000297
RAX: ffffffff83b29f31 RBX: 00000000ffff0000 RCX: 0000000000000002
RDX: ffff88811bf79400 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900012e6ed8 R08: 1ffff11023b6dc82 R09: 1ffff11023b6dc92
R10: 1ffff11023b6dc81 R11: fffff5200025cde0 R12: ffff88811f882000
R13: dffffc0000000000 R14: ffff888112e68000 R15: 0000000000000022
FS:  00007f1ccbe106c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 000000011b110000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 qdisc_match_from_root net/sched/sch_api.c:266 [inline]
 qdisc_lookup+0x2d1/0x4d0 net/sched/sch_api.c:309
 qdisc_tree_reduce_backlog+0x10b/0x380 net/sched/sch_api.c:800
 fq_codel_change+0xa6d/0xeb0 net/sched/sch_fq_codel.c:473
 fq_codel_init+0x2f0/0x8c0 net/sched/sch_fq_codel.c:512
 qdisc_create+0x84c/0x1220 net/sched/sch_api.c:1272
 tc_modify_qdisc+0x8c2/0x1470 net/sched/sch_api.c:-1
 rtnetlink_rcv_msg+0x9e9/0xca0 net/core/rtnetlink.c:5622
 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2508
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5640
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x949/0xb70 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2377
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2431
 __sys_sendmsg net/socket.c:2460 [inline]
 __do_sys_sendmsg net/socket.c:2469 [inline]
 __se_sys_sendmsg net/socket.c:2467 [inline]
 __x64_sys_sendmsg+0x201/0x2d0 net/socket.c:2467
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f1ccd3b8559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1ccbe10028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1ccd63efa0 RCX: 00007f1ccd3b8559
RDX: 00000000000008c0 RSI: 0000200000000740 RDI: 0000000000000003
RBP: 00007f1ccd44fb20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1ccd63f038 R14: 00007f1ccd63efa0 R15: 00007ffc0b485bd8