watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.2.99:725] Modules linked in: CPU: 0 PID: 725 Comm: syz.2.99 Not tainted 5.10.238-syzkaller-1007479-gd76d4cd0623a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:121 [inline] RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x589/0xb70 kernel/locking/qspinlock.c:508 Code: 00 48 8b 44 24 10 42 0f b6 04 38 84 c0 0f 85 c4 01 00 00 48 8b 44 24 08 c6 00 01 41 be 00 80 ff ff eb 07 f3 90 41 ff c6 74 4b <43> 0f b6 44 3d 00 84 c0 75 2e 80 3b 00 75 ea 48 89 df be 02 00 00 RSP: 0018:ffffc90001527a80 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffff88811d93e888 RCX: ffffffff814b175a RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88811d93e888 RBP: ffffc90001527b70 R08: dffffc0000000000 R09: ffffed1023b27d12 R10: ffffed1023b27d12 R11: 1ffff11023b27d11 R12: ffff8881f73d2980 R13: 1ffff11023b27d11 R14: 00000000ffffeaf8 R15: dffffc0000000000 FS: 000055557b358500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4bf0298d58 CR3: 000000011d491000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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: 0033:0x7f4bf0848169 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:00007ffd25a64448 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f4bf0a71ba0 RCX: 00007f4bf0848169 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f4bf0a71ba0 R08: 0000000000000000 R09: 0000000325a6473f R10: 00007f4bf0a71ac0 R11: 0000000000000246 R12: 000000000000d6ca R13: 00007ffd25a64540 R14: ffffffffffffffff R15: 00007ffd25a64560 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 727 Comm: syz.2.99 Not tainted 5.10.238-syzkaller-1007479-gd76d4cd0623a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:preempt_count_sub+0x69/0x170 kernel/sched/core.c:4500 Code: 7f 39 cf 7f 27 81 ff ff 00 00 00 0f 93 c1 84 c0 0f 95 c0 08 c8 74 55 65 8b 05 9f 67 be 7e f7 df 65 01 3d 96 67 be 7e 5b 41 5e <5d> c3 e8 d0 66 f3 00 85 c0 74 f2 48 c7 c0 08 44 a3 86 48 c1 e8 03 RSP: 0018:ffffc9000158e780 EFLAGS: 00000203 RAX: 0000000000000402 RBX: ffff88811d93e888 RCX: 0000000000000401 RDX: 0000000000000000 RSI: 0000000000000201 RDI: 00000000fffffe00 RBP: ffffc9000158e780 R08: dffffc0000000000 R09: ffffed1023b27d12 R10: ffffed1023b27d12 R11: 1ffff11023b27d11 R12: dffffc0000000000 R13: 1ffff920002b1cf4 R14: ffffffff8459fe8a R15: 00000000d60a1994 FS: 00007f4bf02986c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4bf0297f98 CR3: 000000011d491000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __local_bh_enable_ip+0x22/0x80 kernel/softirq.c:187 __raw_spin_trylock_bh include/linux/spinlock_api_smp.h:186 [inline] _raw_spin_trylock_bh+0xd5/0x130 kernel/locking/spinlock.c:143 spin_trylock_bh include/linux/spinlock.h:414 [inline] tipc_sk_rcv+0x41a/0x1ef0 net/tipc/socket.c:2492 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+0x4dd/0x790 net/tipc/socket.c:1306 tipc_sk_conn_proto_rcv net/tipc/socket.c:1358 [inline] tipc_sk_proto_rcv+0x98d/0x1ac0 net/tipc/socket.c:2156 tipc_sk_filter_rcv+0x30ac/0x3850 net/tipc/socket.c:2350 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: 0033:0x7f4bf0848169 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:00007f4bf0298038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f4bf0a70080 RCX: 00007f4bf0848169 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007f4bf08caa68 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f4bf0a70080 R15: 00007ffd25a642e8