RBP: 00007fcd9770f00c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd97900038 R14: 00007fcd978fffa0 R15: 00007ffe593651d8
 </TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 287s! [syz.3.1049:3789]
Modules linked in:
CPU: 0 PID: 3789 Comm: syz.3.1049 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x49/0x60 kernel/kcov.c:212
Code: 81 fa 00 01 00 00 75 35 83 b9 5c 0b 00 00 00 74 2c 8b 91 38 0b 00 00 83 fa 02 75 21 48 8b 91 40 0b 00 00 48 8b 32 48 8d 7e 01 <8b> 89 3c 0b 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 3a 5d c3 66
RSP: 0018:ffffc90000b66e98 EFLAGS: 00000246
RAX: ffffffff83daab86 RBX: 00000000ffff0000 RCX: ffff88810fc30000
RDX: ffffc9000910b000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90000b66e98 R08: 1ffff11024ba4512 R09: 1ffff11024ba4501
R10: dffffc0000000000 R11: fffff5200016cdd8 R12: ffff888116bbe000
R13: dffffc0000000000 R14: ffff8881015c6800 R15: 00000000ffff0000
FS:  00007fcd960d16c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c25c968 CR3: 0000000123994000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 qdisc_match_from_root net/sched/sch_api.c:266 [inline]
 qdisc_lookup+0x306/0x4d0 net/sched/sch_api.c:309
 qdisc_tree_reduce_backlog+0x10b/0x380 net/sched/sch_api.c:784
 fq_codel_change+0xa89/0xf60 net/sched/sch_fq_codel.c:436
 fq_codel_init+0x33f/0xa40 net/sched/sch_fq_codel.c:473
 qdisc_create+0x807/0x11a0 net/sched/sch_api.c:1256
 tc_modify_qdisc+0x8ce/0x1550 net/sched/sch_api.c:-1
 rtnetlink_rcv_msg+0x9fd/0xcb0 net/core/rtnetlink.c:5654
 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2516
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5672
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x879/0xb80 net/netlink/af_netlink.c:1927
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2436
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2490
 __sys_sendmsg net/socket.c:2519 [inline]
 __do_sys_sendmsg net/socket.c:2528 [inline]
 __se_sys_sendmsg net/socket.c:2526 [inline]
 __x64_sys_sendmsg+0x201/0x2d0 net/socket.c:2526
 x64_sys_call+0x4b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fcd97678019
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:00007fcd960d1028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fcd978fffa0 RCX: 00007fcd97678019
RDX: 0000000000008840 RSI: 0000200000000740 RDI: 0000000000000003
RBP: 00007fcd9770f00c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd97900038 R14: 00007fcd978fffa0 R15: 00007ffe593651d8
 </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:729