IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [kworker/u4:3:119] watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/u4:1:23] Modules linked in: Modules linked in: irq event stamp: 778063 irq event stamp: 161969 hardirqs last enabled at (778062): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last enabled at (161968): [] kvm_wait arch/x86/kernel/kvm.c:799 [inline] hardirqs last enabled at (161968): [] kvm_wait+0x14b/0x240 arch/x86/kernel/kvm.c:779 hardirqs last disabled at (778063): [] trace_hardirqs_off_thunk+0x1a/0x1c hardirqs last disabled at (161969): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (773092): [] tipc_shutdown+0x121/0x310 net/tipc/socket.c:2603 softirqs last enabled at (152122): [] tipc_accept+0x213/0x10b0 net/tipc/socket.c:2566 softirqs last disabled at (773094): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (773094): [] tipc_topsrv_stop net/tipc/topsrv.c:702 [inline] softirqs last disabled at (773094): [] tipc_topsrv_exit_net+0x283/0x5c0 net/tipc/topsrv.c:722 softirqs last disabled at (152144): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (152144): [] tipc_conn_kref_release net/tipc/topsrv.c:137 [inline] softirqs last disabled at (152144): [] kref_put include/linux/kref.h:70 [inline] softirqs last disabled at (152144): [] conn_put+0x7a/0x3a0 net/tipc/topsrv.c:155 CPU: 0 PID: 23 Comm: kworker/u4:1 Not tainted 4.19.211-syzkaller #0 CPU: 1 PID: 119 Comm: kworker/u4:3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Workqueue: tipc_rcv tipc_conn_recv_work RIP: 0010:idr_find+0x37/0x50 lib/idr.c:177 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 Code: 48 8d 7d 48 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 13 8b 45 48 48 89 ef 48 29 c3 <48> 89 de 5b 5d e9 3f 10 01 00 e8 9a 7b aa f9 eb e6 0f 1f 84 00 00 Code: 48 89 df e8 f4 20 7f f9 e9 2e ff ff ff 48 89 df e8 e7 20 7f f9 eb 82 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 14 43 4e 00 fb f4 90 e9 07 00 00 00 0f 00 2d 04 43 4e 00 f4 c3 90 90 41 56 41 55 RSP: 0018:ffff8880b5047bc8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RSP: 0018:ffff8880b4c27bb8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 00000000291b6203 RCX: ffffffff87bb46ad RDX: 1ffff1101352e8f9 RSI: ffffffff87ede5fd RDI: ffff88809a974780 RAX: 1ffffffff13e3054 RBX: ffff88809a9747d0 RCX: 1ffff11016982587 RBP: ffff88809a974780 R08: 0000000000000001 R09: 0000000000000000 RDX: dffffc0000000000 RSI: ffff8880b4c12c18 RDI: ffff8880b4c12bc4 R10: 0000000000000005 R11: 0000000000000000 R12: ffff88809a9747d0 RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000000 R13: ffffed101352e901 R14: ffff88808df6d980 R15: 000000000000002d R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 R13: ffffed101352e8fa R14: 0000000000000001 R15: ffff8880ba12be00 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4bf737701d CR3: 0000000009e6d000 CR4: 00000000003406f0 CR2: 00007f3e19a09008 CR3: 00000000ab781000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] kvm_wait arch/x86/kernel/kvm.c:799 [inline] kvm_wait+0x179/0x240 arch/x86/kernel/kvm.c:779 tipc_topsrv_stop net/tipc/topsrv.c:698 [inline] tipc_topsrv_exit_net+0x25e/0x5c0 net/tipc/topsrv.c:722 pv_wait arch/x86/include/asm/paravirt.h:689 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:471 [inline] __pv_queued_spin_lock_slowpath+0x86a/0xae0 kernel/locking/qspinlock.c:474 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:679 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:53 [inline] queued_spin_lock include/asm-generic/qspinlock.h:88 [inline] do_raw_spin_lock+0x189/0x220 kernel/locking/spinlock_debug.c:113 spin_lock_bh include/linux/spinlock.h:334 [inline] tipc_conn_kref_release net/tipc/topsrv.c:137 [inline] kref_put include/linux/kref.h:70 [inline] conn_put+0x7a/0x3a0 net/tipc/topsrv.c:155 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 kthread+0x33f/0x460 kernel/kthread.c:259 ---------------- Code disassembly (best guess): 0: 48 8d 7d 48 lea 0x48(%rbp),%rdi 4: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax b: fc ff df e: 48 89 fa mov %rdi,%rdx 11: 48 c1 ea 03 shr $0x3,%rdx 15: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 19: 84 c0 test %al,%al 1b: 74 04 je 0x21 1d: 3c 03 cmp $0x3,%al 1f: 7e 13 jle 0x34 21: 8b 45 48 mov 0x48(%rbp),%eax 24: 48 89 ef mov %rbp,%rdi 27: 48 29 c3 sub %rax,%rbx * 2a: 48 89 de mov %rbx,%rsi <-- trapping instruction 2d: 5b pop %rbx 2e: 5d pop %rbp 2f: e9 3f 10 01 00 jmpq 0x11073 34: e8 9a 7b aa f9 callq 0xf9aa7bd3 39: eb e6 jmp 0x21 3b: 0f .byte 0xf 3c: 1f (bad) 3d: 84 00 test %al,(%rax)