RBP: 00007f76ff613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f76ff7e6038 R14: 00007f76ff7e5fa0 R15: 00007ffc86736c38
</TASK>
watchdog: BUG: soft lockup - CPU#1 stuck for 222s! [syz.1.7457:25593]
Modules linked in:
CPU: 1 PID: 25593 Comm: syz.1.7457 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__sanitizer_cov_trace_switch+0x38/0xe0 kernel/kcov.c:348
Code: f9 07 0f 87 c5 00 00 00 b8 8b 00 00 00 0f a3 c8 0f 83 b7 00 00 00 48 8b 06 48 85 c0 0f 84 ab 00 00 00 55 48 89 e5 41 57 41 56 <41> 54 53 48 8b 0c cd b0 48 8a 85 48 8b 55 08 65 4c 8b 05 61 3e 92
RSP: 0018:ffffc90000e86e48 EFLAGS: 00000202
RAX: 0000000000000002 RBX: ffff888115f5803c RCX: 0000000000000003
RDX: ffffc900015aa000 RSI: ffffffff875a59a0 RDI: 00000000fffffff1
RBP: ffffc90000e86e58 R08: ffff88814f043cc0 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000002 R12: 00000000fffffff1
R13: ffff888115f580c8 R14: dffffc0000000000 R15: ffff888115f58000
FS: 00007f77004ea6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c243ade CR3: 000000011e914000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
qdisc_tree_reduce_backlog+0x64/0x360 net/sched/sch_api.c:793
fq_change+0xc18/0x11e0 net/sched/sch_fq.c:912
fq_init+0x3e3/0x5d0 net/sched/sch_fq.c:960
qdisc_create+0x7f3/0x1040 net/sched/sch_api.c:1316
tc_modify_qdisc+0x8ea/0x19b0 net/sched/sch_api.c:-1
rtnetlink_rcv_msg+0x9f4/0xcf0 net/core/rtnetlink.c:6153
netlink_rcv_skb+0x1f2/0x440 net/netlink/af_netlink.c:2521
rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6171
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x8ab/0xa30 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x8aa/0xbc0 net/netlink/af_netlink.c:1873
sock_sendmsg_nosec net/socket.c:716 [inline]
__sock_sendmsg net/socket.c:728 [inline]
____sys_sendmsg+0x5a9/0x990 net/socket.c:2509
___sys_sendmsg+0x21c/0x290 net/socket.c:2563
__sys_sendmsg net/socket.c:2592 [inline]
__do_sys_sendmsg net/socket.c:2601 [inline]
__se_sys_sendmsg net/socket.c:2599 [inline]
__x64_sys_sendmsg+0x1f0/0x2c0 net/socket.c:2599
x64_sys_call+0x171/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f76ff58f749
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f77004ea038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f76ff7e5fa0 RCX: 00007f76ff58f749
RDX: 0000000004048000 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f76ff613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f76ff7e6038 R14: 00007f76ff7e5fa0 R15: 00007ffc86736c38
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at default_idle+0xf/0x20 arch/x86/kernel/process.c:741