syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.1.1033:3445]
Modules linked in:
CPU: 1 PID: 3445 Comm: syz.1.1033 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x105/0x150 arch/x86/kernel/kvm.c:1064
Code: 0b 33 04 f4 eb 87 fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 40 38 f0 75 10 66 90 0f 00 2d 4d 0b 33 04 fb f4 <e9> 5e ff ff ff fb e9 58 ff ff ff e8 cb 1e c6 03 89 f9 80 e1 07 38
RSP: 0018:ffffc9000485f8a0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff88812d1db798 RCX: ffffffff850228c2
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff88812d1db798
RBP: ffffc9000485f930 R08: ffff88812d1db798 R09: 1ffff11025a3b6f3
R10: dffffc0000000000 R11: ffffed1025a3b6f4 R12: 1ffff1103ede0001
R13: ffff8881f6f38cd4 R14: dffffc0000000000 R15: 1ffff9200090bf14
FS:  0000555561694500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555582154908 CR3: 000000012fa9d000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:603 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x690/0xc40 kernel/locking/qspinlock.c:511
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
 queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock include/linux/spinlock.h:187 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline]
 _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x90/0x2a0 net/core/sock.c:3515
 lock_sock include/net/sock.h:1818 [inline]
 tipc_release+0xb2/0x1670 net/tipc/socket.c:639
 __sock_release net/socket.c:652 [inline]
 sock_close+0xf1/0x290 net/socket.c:1389
 __fput+0x1fc/0x8f0 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f953919cdd9
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:00007ffd5354dc78 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f9539417da0 RCX: 00007f953919cdd9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f9539417da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f9539417cb0 R11: 0000000000000246 R12: 0000000000008ecd
R13: 00007f953941609c R14: 0000000000008bc4 R15: 00007f9539416090
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3447 Comm: syz.1.1033 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:check_region_inline mm/kasan/generic.c:172 [inline]
RIP: 0010:kasan_check_range+0x24/0x2a0 mm/kasan/generic.c:189
Code: 90 b8 bf f3 05 3b b0 01 48 85 f6 0f 84 c0 01 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 49 89 f8 49 01 f0 0f 82 1d 02 00 00 <49> 89 f8 49 c1 e8 2f 41 81 f8 ff ff 01 00 0f 82 09 02 00 00 49 bd
RSP: 0018:ffffc900048766b8 EFLAGS: 00000086
RAX: 0000000000000201 RBX: 0000000000000001 RCX: ffffffff815df386
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88811c4c9440
RBP: ffffc900048766e0 R08: ffff88811c4c9448 R09: 1ffff11025a3b6f0
R10: dffffc0000000000 R11: ffffed1025a3b6f1 R12: 0000000000000001
R13: dffffc0000000000 R14: 1ffff9200090ece4 R15: ffff88811c4c9440
FS:  00007f953a0bd6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 000000012fa9d000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_write include/linux/instrumented.h:87 [inline]
 set_bit include/asm-generic/bitops/instrumented-atomic.h:28 [inline]
 set_ti_thread_flag include/linux/thread_info.h:89 [inline]
 set_tsk_thread_flag include/linux/sched.h:2047 [inline]
 set_tsk_need_resched include/linux/sched.h:2078 [inline]
 rcu_read_unlock_special+0x246/0x440 kernel/rcu/tree_plugin.h:665
 __rcu_read_unlock+0x5e/0xa0 kernel/rcu/tree_plugin.h:427
 rcu_read_unlock include/linux/rcupdate.h:832 [inline]
 tipc_sk_lookup+0x557/0x620 net/tipc/socket.c:3006
 tipc_sk_rcv+0x416/0x2c10 net/tipc/socket.c:2494
 tipc_node_xmit+0x26c/0xd90 net/tipc/node.c:1703
 tipc_node_xmit_skb net/tipc/node.c:1768 [inline]
 tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1783
 tipc_sk_rcv+0x1a14/0x2c10 net/tipc/socket.c:2503
 tipc_node_xmit+0x26c/0xd90 net/tipc/node.c:1703
 tipc_sk_push_backlog net/tipc/socket.c:1316 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2257 [inline]
 tipc_sk_filter_rcv+0x1591/0x2d90 net/tipc/socket.c:2366
 tipc_sk_enqueue net/tipc/socket.c:2447 [inline]
 tipc_sk_rcv+0x7ed/0x2c10 net/tipc/socket.c:2499
 tipc_node_xmit+0x26c/0xd90 net/tipc/node.c:1703
 tipc_node_xmit_skb net/tipc/node.c:1768 [inline]
 tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1783
 tipc_sk_backlog_rcv+0x17d/0x210 net/tipc/socket.c:2414
 sk_backlog_rcv include/net/sock.h:1150 [inline]
 __release_sock+0x154/0x380 net/core/sock.c:2951
 release_sock net/core/sock.c:3527 [inline]
 sockopt_release_sock+0x95/0x1f0 net/core/sock.c:1067
 sk_setsockopt+0x1442/0x2730 net/core/sock.c:1545
 sock_setsockopt+0x5a/0x70 net/core/sock.c:1552
 __sys_setsockopt+0x269/0x4e0 net/socket.c:2273
 __do_sys_setsockopt net/socket.c:2288 [inline]
 __se_sys_setsockopt net/socket.c:2285 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2285
 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f953919cdd9
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:00007f953a0bd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f9539415fa0 RCX: 00007f953919cdd9
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f9539232d69 R08: 0000000000000004 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9539416038 R14: 00007f9539415fa0 R15: 00007ffd5354db18
 </TASK>