watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [kworker/u4:11:17953] Modules linked in: irq event stamp: 116274911 hardirqs last enabled at (116274910): [] kvm_wait arch/x86/kernel/kvm.c:997 [inline] hardirqs last enabled at (116274910): [] kvm_wait+0x8d/0x100 arch/x86/kernel/kvm.c:979 hardirqs last disabled at (116274911): [] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1097 softirqs last enabled at (116218318): [] tipc_shutdown+0x198/0x5f0 net/tipc/socket.c:2819 softirqs last disabled at (116218322): [] spin_lock_bh include/linux/spinlock.h:354 [inline] softirqs last disabled at (116218322): [] tipc_conn_kref_release+0x47/0x380 net/tipc/topsrv.c:129 CPU: 0 PID: 17953 Comm: kworker/u4:11 Not tainted 5.17.0-rc1-syzkaller-00210-g6449520391df #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: tipc_rcv tipc_conn_recv_work RIP: 0010:kvm_wait+0x98/0x100 arch/x86/kernel/kvm.c:1001 Code: fa 83 e2 07 38 d0 7f 04 84 c0 75 63 0f b6 07 40 38 c6 74 35 48 83 c4 10 c3 c3 e8 03 ad 4a 00 eb 07 0f 00 2d da 4c 75 08 fb f4 <48> 83 c4 10 c3 89 74 24 0c 48 89 3c 24 e8 c6 a7 4a 00 8b 74 24 0c RSP: 0018:ffffc900057efb10 EFLAGS: 00000206 RAX: 0000000006ee36de RBX: 0000000000000000 RCX: 1ffffffff200709e RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000 RBP: ffff88806c455458 R08: 0000000000000001 R09: ffffffff8ffd3a4f R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: ffffed100d88aa8b R14: 0000000000000001 R15: ffff8880b9c3aa80 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0914e97218 CR3: 00000000189a6000 CR4: 00000000003506f0 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+0x8b8/0xb40 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [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+0x200/0x2b0 kernel/locking/spinlock_debug.c:115 spin_lock_bh include/linux/spinlock.h:354 [inline] tipc_conn_kref_release+0x47/0x380 net/tipc/topsrv.c:129 kref_put include/linux/kref.h:65 [inline] conn_put net/tipc/topsrv.c:147 [inline] tipc_conn_recv_work+0x14a/0x190 net/tipc/topsrv.c:430 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 worker_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 5.17.0-rc1-syzkaller-00210-g6449520391df #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200 Code: 46 00 5d be 03 00 00 00 e9 e6 06 66 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 69 12 8a 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 70 02 00 a9 RSP: 0018:ffffc90000cd7bd0 EFLAGS: 00000282 RAX: 0000000000000201 RBX: 00000000aa47048a RCX: 0000000000000000 RDX: 1ffff1100d88aa8a RSI: ffffffffaa47048a RDI: ffff88806c455400 RBP: ffff88806c455400 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff88c34309 R11: 0000000000000000 R12: ffffffffaa47048a R13: ffffed100d88aa93 R14: ffff88804b3e0c00 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2eb35000 CR3: 0000000050925000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: radix_tree_lookup+0xe/0x20 lib/radix-tree.c:817 tipc_topsrv_stop net/tipc/topsrv.c:691 [inline] tipc_topsrv_exit_net+0x20a/0x5d0 net/tipc/topsrv.c:715 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:168 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:597 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 worker_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: fa cli 1: 83 e2 07 and $0x7,%edx 4: 38 d0 cmp %dl,%al 6: 7f 04 jg 0xc 8: 84 c0 test %al,%al a: 75 63 jne 0x6f c: 0f b6 07 movzbl (%rdi),%eax f: 40 38 c6 cmp %al,%sil 12: 74 35 je 0x49 14: 48 83 c4 10 add $0x10,%rsp 18: c3 retq 19: c3 retq 1a: e8 03 ad 4a 00 callq 0x4aad22 1f: eb 07 jmp 0x28 21: 0f 00 2d da 4c 75 08 verw 0x8754cda(%rip) # 0x8754d02 28: fb sti 29: f4 hlt * 2a: 48 83 c4 10 add $0x10,%rsp <-- trapping instruction 2e: c3 retq 2f: 89 74 24 0c mov %esi,0xc(%rsp) 33: 48 89 3c 24 mov %rdi,(%rsp) 37: e8 c6 a7 4a 00 callq 0x4aa802 3c: 8b 74 24 0c mov 0xc(%rsp),%esi