watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.0.12110:10792]
Modules linked in:
CPU: 0 PID: 10792 Comm: syz.0.12110 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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+0xce/0x130 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 33 1e b8 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d 24 1e b8 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:ffffc90000eaf9a0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff88810ed95e88 RCX: ffffffff814bebea
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88810ed95e88
RBP: ffffc90000eafa50 R08: ffff88810ed95e88 R09: 1ffff11021db2bd1
R10: dffffc0000000000 R11: ffffed1021db2bd2 R12: 0000000000000246
R13: 1ffff11021db2bd1 R14: dffffc0000000000 R15: 1ffff920001d5f38
FS:  00007f0be816a6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555fe00908 CR3: 000000011e567000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 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:184 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:360 [inline]
 lock_sock_nested+0x90/0x2a0 net/core/sock.c:3125
 lock_sock include/net/sock.h:1697 [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+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f0be970f819
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:00007f0be816a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007f0be9988fa0 RCX: 00007f0be970f819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f0be97a5c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0be9989038 R14: 00007f0be9988fa0 R15: 00007ffe46115068
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10795 Comm: syz.0.12110 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:check_preemption_disabled+0x45/0x100 lib/smp_processor_id.c:54
Code: d8 65 8b 05 7d 82 84 7b 65 8b 0d b2 de 84 7b f7 c1 ff ff ff 7f 74 20 65 48 8b 0c 25 28 00 00 00 48 3b 4d d8 0f 85 b4 00 00 00 <48> 83 c4 10 5b 41 5c 41 5e 41 5f 5d c3 48 c7 45 d0 00 00 00 00 9c
RSP: 0018:ffffc900013ae770 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff92000275d00 RCX: 5573fa93b510c800
RDX: 0000000000000000 RSI: ffffffff85408200 RDI: ffffffff854081c0
RBP: ffffc900013ae7a0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000275d28 R12: dffffc0000000000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 000000005fe7a70e
FS:  00007f0be81496c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0be8148ff8 CR3: 000000011e567000 CR4: 00000000003506a0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 debug_smp_processor_id+0x17/0x20 lib/smp_processor_id.c:59
 rcu_read_unlock_special+0xc0/0x430 kernel/rcu/tree_plugin.h:616
 __rcu_read_unlock+0x5e/0xa0 kernel/rcu/tree_plugin.h:399
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 net_generic include/net/netns/generic.h:47 [inline]
 tipc_sk_lookup+0xe3/0x5f0 net/tipc/socket.c:2993
 tipc_sk_rcv+0x350/0x1dc0 net/tipc/socket.c:2488
 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674
 tipc_node_xmit_skb net/tipc/node.c:1739 [inline]
 tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1754
 tipc_sk_rcv+0x18ed/0x1dc0 net/tipc/socket.c:2497
 tipc_node_xmit+0x26c/0xd80 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+0x15e5/0x3910 net/tipc/socket.c:2362
 tipc_sk_enqueue net/tipc/socket.c:2442 [inline]
 tipc_sk_rcv+0x742/0x1dc0 net/tipc/socket.c:2493
 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674
 tipc_node_xmit_skb net/tipc/node.c:1739 [inline]
 tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1754
 tipc_sk_backlog_rcv+0x17d/0x210 net/tipc/socket.c:2410
 sk_backlog_rcv include/net/sock.h:1071 [inline]
 __release_sock+0x146/0x360 net/core/sock.c:2589
 release_sock net/core/sock.c:3142 [inline]
 sock_setsockopt+0x1840/0x2680 net/core/sock.c:1257
 __sys_setsockopt+0x272/0x480 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: 0033:0x7f0be970f819
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:00007f0be8149028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f0be9989090 RCX: 00007f0be970f819
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f0be97a5c91 R08: 0000000000000004 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0be9989128 R14: 00007f0be9989090 R15: 00007ffe46115068