watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.5.1373:4505] Modules linked in: CPU: 1 PID: 4505 Comm: syz.5.1373 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 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: 06 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 3d 06 33 04 fb f4 5e ff ff ff fb e9 58 ff ff ff e8 fb 38 c5 03 89 f9 80 e1 07 38 RSP: 0018:ffffc900027078a0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff888112044f98 RCX: ffffffff850148a2 RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff888112044f98 RBP: ffffc90002707930 R08: ffff888112044f98 R09: 1ffff110224089f3 R10: dffffc0000000000 R11: ffffed10224089f4 R12: 1ffff1103ede0001 R13: ffff8881f6f38cd4 R14: dffffc0000000000 R15: 1ffff920004e0f14 FS: 0000555587db9500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f8766d31b8 CR3: 0000000115cbd000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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: 0033:0x7fed41f8a029 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:00007ffe84a03798 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fed42157ba0 RCX: 00007fed41f8a029 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fed42157ba0 R08: 0000000000000001 R09: ffffffffffffffff R10: 00007fed42157ac0 R11: 0000000000000246 R12: 000000000000de0a R13: 00007fed42156080 R14: 0000000000000032 R15: ffffffffffffffff Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4510 Comm: syz.5.1373 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:check_region_inline mm/kasan/generic.c:169 [inline] RIP: 0010:kasan_check_range+0xc/0x2a0 mm/kasan/generic.c:189 Code: 0b b8 ea ff ff ff c3 00 00 cc cc 00 00 cc 90 90 90 90 90 90 90 90 90 90 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 RSP: 0018:ffffc90002736820 EFLAGS: 00000202 RAX: 0000000000000401 RBX: ffff888112044f98 RCX: ffffffff85012201 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888112044f98 RBP: ffffc90002736830 R08: ffff888112044f83 R09: 1ffff110224089f0 R10: dffffc0000000000 R11: ffffed10224089f1 R12: dffffc0000000000 R13: 1ffff920004e6d08 R14: ffffffff84d9bb0e R15: ffff888112044f00 FS: 00007fed42e126c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 0000000115cbd000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:72 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] queued_spin_trylock include/asm-generic/qspinlock.h:92 [inline] do_raw_spin_trylock include/linux/spinlock.h:193 [inline] __raw_spin_trylock_bh include/linux/spinlock_api_smp.h:173 [inline] _raw_spin_trylock_bh+0x81/0x150 kernel/locking/spinlock.c:146 spin_trylock_bh include/linux/spinlock.h:411 [inline] tipc_sk_rcv+0x43e/0x2c10 net/tipc/socket.c:2496 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:2501 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:2255 [inline] tipc_sk_filter_rcv+0x158e/0x2cf0 net/tipc/socket.c:2364 tipc_sk_enqueue net/tipc/socket.c:2445 [inline] tipc_sk_rcv+0x7ed/0x2c10 net/tipc/socket.c:2497 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:2412 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: 0033:0x7fed41f8a029 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:00007fed42e12058 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fed42155fa0 RCX: 00007fed41f8a029 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007fed4200da05 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fed42155fa0 R15: 00007ffe84a03638