watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.3.6977:25423] Modules linked in: CPU: 0 PID: 25423 Comm: syz.3.6977 Tainted: G W 5.10.238-syzkaller-00008-g59e9a7228857 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] RIP: 0010:kvm_wait+0xc2/0x120 arch/x86/kernel/kvm.c:926 Code: 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 3f 9d 98 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d 30 9d 98 03 fb f4 <4c> 89 64 24 18 ff 74 24 18 9d 48 c7 44 24 20 0e 36 e0 45 4b c7 04 RSP: 0018:ffffc90000edf9c0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff888119032888 RCX: ffffffff814b175a RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff888119032888 RBP: ffffc90000edfa70 R08: dffffc0000000000 R09: ffffed1023206512 R10: ffffed1023206512 R11: 1ffff11023206511 R12: 0000000000000246 R13: 1ffff11023206511 R14: dffffc0000000000 R15: 1ffff920001dbf3c FS: 000055555d60a500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ed20220 CR3: 0000000113294000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:564 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x714/0xb70 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:183 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0xd8/0xe0 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] lock_sock_nested+0x92/0x290 net/core/sock.c:3117 lock_sock include/net/sock.h:1648 [inline] tipc_release+0x56/0x1490 net/tipc/socket.c:626 __sock_release net/socket.c:597 [inline] sock_close+0xe0/0x270 net/socket.c:1286 __fput+0x2fb/0x770 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x127/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0x68/0x90 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fc32d93b929 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:00007ffc255d4da8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fc32db64ba0 RCX: 00007fc32d93b929 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fc32db64ba0 R08: 0000000000000000 R09: 0000000f255d509f R10: 00007fc32db64ac0 R11: 0000000000000246 R12: 000000000008589d R13: 00007ffc255d4ea0 R14: ffffffffffffffff R15: 00007ffc255d4ec0 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 25424 Comm: syz.3.6977 Tainted: G W 5.10.238-syzkaller-00008-g59e9a7228857 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:update_stack_state+0x368/0x480 arch/x86/kernel/unwind_frame.c:234 Code: 03 49 bc 00 00 00 00 00 fc ff df 42 80 3c 20 00 74 08 4c 89 f7 e8 58 d8 6e 00 48 8b 45 d0 49 89 06 48 8b 45 98 42 80 3c 20 00 <4c> 8b 75 c8 4c 8b 6d c0 74 08 4c 89 f7 e8 36 d8 6e 00 49 c7 06 00 RSP: 0018:ffffc90000170550 EFLAGS: 00000046 RAX: 1ffff9200002e0ef RBX: ffffc90000170720 RCX: ffffc900010e6c01 RDX: ffffc900010e6c50 RSI: 1ffff9200002e0e5 RDI: ffffc90000170778 RBP: ffffc90000170610 R08: dffffc0000000001 R09: ffffc90000170720 R10: fffff5200002e0f0 R11: 1ffff9200002e0e4 R12: dffffc0000000000 R13: 0000000000000000 R14: ffffc90000170758 R15: 1ffff9200002e0ec FS: 00007fc32bfa46c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000000 CR3: 0000000113294000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: unwind_next_frame+0x3d5/0x700 arch/x86/kernel/unwind_frame.c:305 perf_callchain_kernel+0x464/0x5c0 arch/x86/events/core.c:2565 get_perf_callchain+0x376/0x480 kernel/events/callchain.c:200 perf_callchain kernel/events/core.c:7204 [inline] perf_prepare_sample+0x32e/0x1930 kernel/events/core.c:7231 __perf_event_output kernel/events/core.c:7389 [inline] perf_event_output_forward+0xb5/0x160 kernel/events/core.c:7409 __perf_event_overflow+0x1b3/0x340 kernel/events/core.c:9065 perf_swevent_hrtimer+0x3db/0x530 kernel/events/core.c:10468 __run_hrtimer kernel/time/hrtimer.c:1587 [inline] __hrtimer_run_queues+0x37a/0x960 kernel/time/hrtimer.c:1651 hrtimer_interrupt+0x3a6/0xdc0 kernel/time/hrtimer.c:1713 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0xfa/0x3f0 arch/x86/kernel/apic/apic.c:1112 asm_call_irq_on_stack+0xf/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0x85/0xe0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:memcmp lib/string.c:942 [inline] RIP: 0010:bcmp+0x3c/0xd0 lib/string.c:964 Code: 84 a5 00 00 00 48 bb 00 00 00 00 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 0f b6 0c 19 84 c9 75 2d 42 0f b6 04 37 <4a> 8d 0c 36 49 89 c8 49 c1 e8 03 45 0f b6 04 18 45 84 c0 75 3b 42 RSP: 0018:ffffc900010e68a0 EFLAGS: 00000246 RAX: 00000000000000e1 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffc900010e6960 RDI: ffff888119032b5c RBP: ffffc900010e68d0 R08: 0000000000000004 R09: 0000000000000003 R10: fffff5200021cd2c R11: 1ffff9200021cd2c R12: 0000000000000004 R13: ffff888119032be8 R14: 0000000000000000 R15: fffffffffffffc18 rhashtable_compare include/linux/rhashtable.h:577 [inline] __rhashtable_lookup include/linux/rhashtable.h:602 [inline] rhashtable_lookup include/linux/rhashtable.h:638 [inline] tipc_sk_lookup+0x2f3/0x5f0 net/tipc/socket.c:2997 tipc_sk_rcv+0x3eb/0x1ef0 net/tipc/socket.c:2488 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_node_xmit_skb net/tipc/node.c:1739 [inline] tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1754 tipc_sk_rcv+0x19b9/0x1ef0 net/tipc/socket.c:2497 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_sk_push_backlog net/tipc/socket.c:1306 [inline] tipc_sk_filter_connect net/tipc/socket.c:2253 [inline] tipc_sk_filter_rcv+0x1581/0x3850 net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2442 [inline] tipc_sk_rcv+0x7cc/0x1ef0 net/tipc/socket.c:2493 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_node_xmit_skb net/tipc/node.c:1739 [inline] tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1754 tipc_sk_backlog_rcv+0x16f/0x1f0 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1052 [inline] __release_sock+0x146/0x360 net/core/sock.c:2583 release_sock net/core/sock.c:3134 [inline] sock_setsockopt+0x125e/0x2350 net/core/sock.c:1257 __sys_setsockopt+0x265/0x460 net/socket.c:2142 __do_sys_setsockopt net/socket.c:2157 [inline] __se_sys_setsockopt net/socket.c:2154 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2154 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fc32d93b929 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:00007fc32bfa4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fc32db62fa0 RCX: 00007fc32d93b929 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000006 RBP: 00007fc32d9bdb39 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc32db62fa0 R15: 00007ffc255d4c48