watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:11715] Modules linked in: irq event stamp: 5641 hardirqs last enabled at (5640): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (5641): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (616): [] ipt_do_table+0xccf/0x1820 net/ipv4/netfilter/ip_tables.c:358 softirqs last disabled at (618): [] lwtunnel_xmit_redirect include/net/lwtunnel.h:92 [inline] softirqs last disabled at (618): [] ip_finish_output2+0x28d/0x15a0 net/ipv4/ip_output.c:214 CPU: 0 PID: 11715 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:31 [inline] RIP: 0010:atomic_read include/asm-generic/atomic-instrumented.h:22 [inline] RIP: 0010:queued_spin_is_locked include/asm-generic/qspinlock.h:35 [inline] RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:98 [inline] RIP: 0010:do_raw_spin_unlock+0x65/0x230 kernel/locking/spinlock_debug.c:134 Code: ad de 0f 85 74 01 00 00 be 04 00 00 00 48 89 ef e8 a0 6d 4c 00 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 <48> 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 6b 01 00 00 8b RSP: 0018:ffff88804818f260 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880a3643540 RCX: ffffffff814be140 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a36435b0 RBP: ffff8880a36435b0 R08: 0000000000000000 R09: ffffed10146c86b6 R10: ffff8880a36435b3 R11: 0000000000074071 R12: 1ffff11009031e57 R13: 0000000000000006 R14: ffff8880a36435b0 R15: 0000000000000024 FS: 00007fc24d977700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffddbcb7d04 CR3: 000000009b20c000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock+0x1f/0x40 kernel/locking/spinlock.c:176 spin_unlock include/linux/spinlock.h:369 [inline] tcf_police_act+0x786/0xe60 net/sched/act_police.c:268 tcf_action_exec net/sched/act_api.c:618 [inline] tcf_action_exec+0x160/0x400 net/sched/act_api.c:598 tcf_exts_exec include/net/pkt_cls.h:388 [inline] route4_classify+0x8d6/0x1420 net/sched/cls_route.c:183 tcf_classify+0x120/0x3c0 net/sched/cls_api.c:979 drr_classify net/sched/sch_drr.c:329 [inline] drr_enqueue+0x39e/0x8c0 net/sched/sch_drr.c:357 __dev_xmit_skb net/core/dev.c:3494 [inline] __dev_queue_xmit+0x140a/0x2e00 net/core/dev.c:3807 neigh_resolve_output+0x55a/0x910 net/core/neighbour.c:1374 neigh_output include/net/neighbour.h:501 [inline] ip_finish_output2+0xd76/0x15a0 net/ipv4/ip_output.c:230 ip_finish_output+0xae9/0x10b0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:455 [inline] ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125 ip_send_skb net/ipv4/ip_output.c:1452 [inline] ip_push_pending_frames+0x8b/0x140 net/ipv4/ip_output.c:1472 raw_sendmsg+0x1e9d/0x29e0 net/ipv4/raw.c:677 inet_sendmsg+0x132/0x5a0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 __sys_sendto+0x21a/0x320 net/socket.c:1899 __do_sys_sendto net/socket.c:1911 [inline] __se_sys_sendto net/socket.c:1907 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1907 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc24f0230e9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc24d977168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fc24f136030 RCX: 00007fc24f0230e9 RDX: 0000000000000002 RSI: 0000000020000200 RDI: 000000000000000a RBP: 00007fc24f07d08d R08: 0000000020000100 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffe0e56bdf R14: 00007fc24d977300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 ---------------- Code disassembly (best guess): 0: ad lods %ds:(%rsi),%eax 1: de 0f fimuls (%rdi) 3: 85 74 01 00 test %esi,0x0(%rcx,%rax,1) 7: 00 be 04 00 00 00 add %bh,0x4(%rsi) d: 48 89 ef mov %rbp,%rdi 10: e8 a0 6d 4c 00 callq 0x4c6db5 15: 48 89 ea mov %rbp,%rdx 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 48 c1 ea 03 shr $0x3,%rdx 26: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx * 2a: 48 89 e8 mov %rbp,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 03 add $0x3,%eax 33: 38 d0 cmp %dl,%al 35: 7c 08 jl 0x3f 37: 84 d2 test %dl,%dl 39: 0f 85 6b 01 00 00 jne 0x1aa 3f: 8b .byte 0x8b