R13: 00007fce30e26038 R14: 00007fce30e25fa0 R15: 00007ffcf7c2e708
 </TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 287s! [syz.8.2332:8029]
Modules linked in:
CPU: 0 PID: 8029 Comm: syz.8.2332 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:qdisc_match_from_root net/sched/sch_api.c:268 [inline]
RIP: 0010:qdisc_lookup_rcu+0xed/0x4d0 net/sched/sch_api.c:324
Code: 88 00 00 00 4d 8d 66 38 4c 89 e0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 7c 03 00 00 45 8b 24 24 44 89 e7 89 de e8 13 aa 66 fd <41> 39 dc 75 6e 4d 85 f6 0f 84 24 01 00 00 e8 50 a8 66 fd e9 0c 03
RSP: 0018:ffffc90001176e48 EFLAGS: 00000297
RAX: ffffffff840ac9bd RBX: 00000000ffff0000 RCX: 0000000000000002
RDX: ffff88811961a880 RSI: 00000000ffff0000 RDI: 00000000000a0000
RBP: ffffc90001176e78 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200022edcc R12: 00000000000a0000
R13: dffffc0000000000 R14: ffff888131f84000 R15: ffff88810dede000
FS:  00007fce31a076c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fce319e6d58 CR3: 0000000114250000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 qdisc_tree_reduce_backlog+0x10b/0x3a0 net/sched/sch_api.c:792
 fq_change+0xd3e/0x1340 net/sched/sch_fq.c:912
 fq_init+0x3e3/0x5d0 net/sched/sch_fq.c:960
 qdisc_create+0x89b/0x1180 net/sched/sch_api.c:1306
 tc_modify_qdisc+0x924/0x19c0 net/sched/sch_api.c:-1
 rtnetlink_rcv_msg+0xb28/0xde0 net/core/rtnetlink.c:6162
 netlink_rcv_skb+0x200/0x450 net/netlink/af_netlink.c:2526
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6180
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x8c1/0xa60 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x8b9/0xbd0 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:716 [inline]
 __sock_sendmsg net/socket.c:728 [inline]
 ____sys_sendmsg+0x5fb/0x9c0 net/socket.c:2509
 ___sys_sendmsg+0x2a2/0x360 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+0x20d/0x2e0 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:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fce30b9f559
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:00007fce31a07028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fce30e25fa0 RCX: 00007fce30b9f559
RDX: 0000000000000800 RSI: 0000200000001200 RDI: 0000000000000003
RBP: 00007fce30c36b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fce30e26038 R14: 00007fce30e25fa0 R15: 00007ffcf7c2e708
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20 arch/x86/kernel/process.c:741