watchdog: BUG: soft lockup - CPU#1 stuck for 117s! [syz.5.5207:20604] Modules linked in: CPU: 1 PID: 20604 Comm: syz.5.5207 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x584/0xb70 kernel/locking/qspinlock.c:508 Code: 00 00 41 c6 06 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 RSP: 0018:ffffc9000146fa60 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffff88811f2c6d88 RCX: ffffffff814b241a RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88811f2c6d88 RBP: ffffc9000146fb50 R08: dffffc0000000000 R09: ffffed1023e58db2 R10: ffffed1023e58db2 R11: 1ffff11023e58db1 R12: ffff8881f73d2c40 R13: 1ffff11023e58db1 R14: 00000000ffffe3e3 R15: dffffc0000000000 FS: 0000555581878500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffde000000 CR3: 0000000112e5d000 CR4: 00000000003526a0 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:184 [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:360 [inline] lock_sock_nested+0x92/0x290 net/core/sock.c:3125 lock_sock include/net/sock.h:1684 [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: 0033:0x7f3cc5af6749 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:00007ffc5b857d18 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f3cc5d4eda0 RCX: 00007f3cc5af6749 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f3cc5d4eda0 R08: 00000000000000f8 R09: 0000000e5b85800f R10: 00007f3cc5d4ecb0 R11: 0000000000000246 R12: 00000000000c1986 R13: 00007f3cc5d4d090 R14: ffffffffffffffff R15: 00007ffc5b857e30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 20605 Comm: syz.5.5207 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:check_region_inline mm/kasan/generic.c:169 [inline] RIP: 0010:kasan_check_range+0x11/0x290 mm/kasan/generic.c:189 Code: 5d c3 0f 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 00 00 cc cc 00 00 cc b0 01 48 85 f6 0f 84 a9 01 00 00 55 48 89 e5 41 57 <41> 56 53 49 89 f8 49 01 f0 0f 82 58 02 00 00 49 89 f8 49 c1 e8 2f RSP: 0018:ffffc90000c269d8 EFLAGS: 00000202 RAX: 0000000000000401 RBX: ffffc90000c26ed4 RCX: ffffffff8478497e RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000c26a20 RBP: ffffc90000c269e0 R08: dffffc0000000000 R09: fffff52000184ddb R10: fffff52000184ddb R11: 1ffff92000184dda R12: dffffc0000000000 R13: ffffc90000c26ed0 R14: ffffc90000c26a20 R15: 1ffff92000184d40 FS: 00007f3cc455e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffde000000 CR3: 0000000112e5d000 CR4: 00000000003526b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:706 [inline] queued_spin_lock include/asm-generic/qspinlock.h:82 [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+0x8e/0xe0 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:360 [inline] tipc_skb_peek_port net/tipc/msg.h:1248 [inline] tipc_sk_rcv+0x221/0x1ef0 net/tipc/socket.c:2487 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_node_xmit_skb+0xe9/0x130 net/tipc/node.c:1739 tipc_sk_rcv+0x1d77/0x1ef0 net/tipc/socket.c:2518 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:1058 [inline] __release_sock+0x146/0x360 net/core/sock.c:2589 release_sock+0x60/0x1b0 net/core/sock.c:3142 tipc_release+0xbd4/0x1490 net/tipc/socket.c:639 __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: 0033:0x7f3cc5af6749 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:00007f3cc455e038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007f3cc5d4cfa0 RCX: 00007f3cc5af6749 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003 RBP: 00007f3cc5b7af91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3cc5d4d038 R14: 00007f3cc5d4cfa0 R15: 00007ffc5b857bb8