kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.9.1769:7004]
Modules linked in:
CPU: 0 PID: 7004 Comm: syz.9.1769 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:190
Code: 00 00 00 0f 0b 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d 4c c2 5e 05 48 89 de e8 34 d7 39 00 5b 5d c3 00 <55> 48 89 e5 48 8b 45 08 65 48 8b 0d b0 bb 9d 7e 65 8b 15 b5 bb 9d
RSP: 0018:ffffc90001dcef20 EFLAGS: 00000207
RAX: ffffffff83b1f89d RBX: 00000000ffff0000 RCX: 0000000000000002
RDX: ffff888137ddcf00 RSI: 00000000ffff0000 RDI: 0000000000000000
RBP: ffffc90001dcef58 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520003b9de8 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881287a2800 R15: ffff8881273e8000
FS:  00007f905f4b06c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffd7223f28 CR3: 00000001347ca000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 qdisc_tree_reduce_backlog+0x10b/0x380 net/sched/sch_api.c:783
 codel_change+0x8f0/0xbc0 net/sched/sch_codel.c:218
 codel_init+0x1a3/0x390 net/sched/sch_codel.c:237
 qdisc_create+0x84c/0x1220 net/sched/sch_api.c:1255
 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: 0033:0x7f9060a990d9
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:00007f905f4b0028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9060d21180 RCX: 00007f9060a990d9
RDX: 0000000000000000 RSI: 0000200000001200 RDI: 0000000000000007
RBP: 00007f9060b30024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9060d21218 R14: 00007f9060d21180 R15: 00007ffdb7245b48