watchdog: BUG: soft lockup - CPU#0 stuck for 131s! [syz.1.1361:5534] Modules linked in: CPU: 0 PID: 5534 Comm: syz.1.1361 Tainted: G W 5.10.234-syzkaller-00033-g094fc3778d6b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x5a1/0xc70 kernel/locking/qspinlock.c:508 Code: 85 ba 01 00 00 c6 03 00 48 8b 44 24 28 42 0f b6 04 30 84 c0 0f 85 bf 01 00 00 48 8b 04 24 c6 00 01 bb 00 80 ff ff eb 06 f3 90 c3 74 50 43 0f b6 44 35 00 84 c0 75 32 41 80 3c 24 00 75 e9 4c RSP: 0018:ffffc900014a7620 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 00000000ffffbf9c RCX: ffffffff8150ca54 RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffc900014a75a0 RBP: ffffc900014a7710 R08: dffffc0000000000 R09: ffffed1024b64bd2 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888125b25e88 R13: 1ffff11024b64bd1 R14: dffffc0000000000 R15: ffff88823ff52f40 FS: 00007f626ae646c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c264a62 CR3: 0000000125c8a000 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 arch/x86/include/asm/qspinlock.h:51 [inline] 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+0x139/0x1b0 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] lock_sock_nested+0x92/0x300 net/core/sock.c:3117 lock_sock include/net/sock.h:1648 [inline] tipc_sendstream+0x47/0x70 net/tipc/socket.c:1540 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2430 __sys_sendmmsg+0x2c3/0x510 net/socket.c:2516 __do_sys_sendmmsg net/socket.c:2545 [inline] __se_sys_sendmmsg net/socket.c:2542 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2542 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f626c81b169 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:00007f626ae64038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f626ca34080 RCX: 00007f626c81b169 RDX: 0000000000000007 RSI: 0000200000002740 RDI: 0000000000000005 RBP: 00007f626c89c2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000d1 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f626ca34080 R15: 00007ffd03838d18 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5533 Comm: syz.1.1361 Tainted: G W 5.10.234-syzkaller-00033-g094fc3778d6b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:_raw_spin_lock_bh+0x6/0x1b0 kernel/locking/spinlock.c:174 Code: 8c 71 ff ff ff 48 8d 7c 24 20 e8 65 f1 f4 fc e9 62 ff ff ff e8 fb 88 fa ff 0f 0b 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 48 83 e4 e0 48 83 ec 60 49 89 fd 65 48 8b 04 RSP: 0018:ffffc90001446a28 EFLAGS: 00000293 RAX: 00000000e36c7801 RBX: 0000000000000005 RCX: ffff8881131bcf00 RDX: 0000000000000000 RSI: 0000000000000005 RDI: ffffc90001446e94 RBP: ffffc90001446a30 R08: ffffffff849a347c R09: ffffed1024b64bd1 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff888125b25e00 R14: 00000000e36c7801 R15: ffffc90001446e80 FS: 00007f626ae856c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000002740 CR3: 0000000125c8a000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000008000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_lock_bh include/linux/spinlock.h:359 [inline] tipc_skb_peek_port net/tipc/msg.h:1248 [inline] tipc_sk_rcv+0x2d6/0x1e30 net/tipc/socket.c:2487 tipc_node_xmit+0x34b/0xe30 net/tipc/node.c:1674 tipc_node_xmit_skb+0x153/0x1b0 net/tipc/node.c:1739 tipc_sk_rcv+0x1c0b/0x1e30 net/tipc/socket.c:2518 tipc_node_xmit+0x34b/0xe30 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+0x1da8/0x3e00 net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2442 [inline] tipc_sk_rcv+0x8a1/0x1e30 net/tipc/socket.c:2493 tipc_node_xmit+0x34b/0xe30 net/tipc/node.c:1674 tipc_node_xmit_skb net/tipc/node.c:1739 [inline] tipc_node_distr_xmit+0x36a/0x4d0 net/tipc/node.c:1754 tipc_sk_backlog_rcv+0x18b/0x210 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1052 [inline] __release_sock+0x148/0x410 net/core/sock.c:2583 release_sock+0x65/0x1b0 net/core/sock.c:3134 tipc_release+0xb6b/0x1440 net/tipc/socket.c:639 __sock_release net/socket.c:597 [inline] sock_close+0xdf/0x270 net/socket.c:1286 __fput+0x33d/0x7b0 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x129/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0xa2/0x1a0 kernel/entry/common.c:274 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f626c81b169 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:00007f626ae85038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007f626ca33fa0 RCX: 00007f626c81b169 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000005 RBP: 00007f626c89c2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f626ca33fa0 R15: 00007ffd03838d18