watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.3.1249:4650] Modules linked in: CPU: 1 PID: 4650 Comm: syz.3.1249 Tainted: G W 5.10.237-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:check_kcov_mode kernel/kcov.c:174 [inline] RIP: 0010:write_comp_data kernel/kcov.c:218 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x36/0x90 kernel/kcov.c:284 Code: c0 d6 9e 7e 65 8b 0d c5 d6 9e 7e f7 c1 00 01 ff 00 74 11 f7 c1 00 01 00 00 74 5b 83 ba dc 0a 00 00 00 74 52 8b 8a b8 0a 00 00 <83> f9 03 75 47 48 8b 8a c0 0a 00 00 44 8b 8a bc 0a 00 00 49 c1 e1 RSP: 0018:ffffc90000df68d0 EFLAGS: 00000246 RAX: ffffffff8459fbef RBX: 000000000000035c RCX: 0000000000000000 RDX: ffff888119da8000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000df68d0 R08: 0000000000000004 R09: 0000000000df6903 R10: fffff520001bed2c R11: 1ffff920001bed2c R12: 0000000000000004 R13: ffff88812979c3e8 R14: 0000000000000000 R15: fffffffffffffc18 FS: 00007f51ef1206c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000126b9b000 CR4: 00000000003506a0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __rhashtable_lookup include/linux/rhashtable.h:602 [inline] rhashtable_lookup include/linux/rhashtable.h:638 [inline] tipc_sk_lookup+0x2ff/0x5f0 net/tipc/socket.c:2997 tipc_sk_rcv+0x3eb/0x1ef0 net/tipc/socket.c:2488 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_rcv+0x19b9/0x1ef0 net/tipc/socket.c:2497 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:1052 [inline] __release_sock+0x146/0x360 net/core/sock.c:2583 release_sock net/core/sock.c:3134 [inline] sock_setsockopt+0x125e/0x2350 net/core/sock.c:1257 __sys_setsockopt+0x265/0x460 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: 0033:0x7f51f0ad8969 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:00007f51ef120038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f51f0d00080 RCX: 00007f51f0ad8969 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000006 RBP: 00007f51f0b5aab1 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f51f0d00080 R15: 00007ffdc1b73db8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4649 Comm: syz.3.1249 Tainted: G W 5.10.237-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 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+0xc2/0x120 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 bf 9d 98 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d b0 9d 98 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:ffffc900010cf6e0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff88812979c088 RCX: ffffffff814b15ba RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88812979c088 RBP: ffffc900010cf790 R08: dffffc0000000000 R09: ffffed10252f3812 R10: ffffed10252f3812 R11: 1ffff110252f3811 R12: 0000000000000246 R13: 1ffff110252f3811 R14: dffffc0000000000 R15: 1ffff92000219ee0 FS: 00007f51ef1416c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055558c3804a8 CR3: 0000000126b9b000 CR4: 00000000003506b0 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:183 [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:359 [inline] lock_sock_nested+0x92/0x290 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+0x5a2/0x8c0 net/socket.c:2376 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2430 __sys_sendmsg net/socket.c:2459 [inline] __do_sys_sendmsg net/socket.c:2468 [inline] __se_sys_sendmsg net/socket.c:2466 [inline] __x64_sys_sendmsg+0x1e2/0x2a0 net/socket.c:2466 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f51f0ad8969 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:00007f51ef141038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f51f0cfffa0 RCX: 00007f51f0ad8969 RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000000007 RBP: 00007f51f0b5aab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f51f0cfffa0 R15: 00007ffdc1b73db8