IPVS: ftp: loaded support on port[0] = 21 audit: type=1800 audit(1642080986.120:1158): pid=31144 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="bus" dev="sda1" ino=14293 res=0 watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.0:31123] Modules linked in: irq event stamp: 2335181 hardirqs last enabled at (2335180): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2335181): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2302596): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2302599): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2302599): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 31123 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x3a6/0xae0 kernel/locking/qspinlock.c:474 Code: eb c6 45 01 01 41 bc 00 80 00 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 <41> 83 ec 01 0f 84 38 04 00 00 41 0f b6 45 00 38 d8 7f 08 84 c0 0f RSP: 0018:ffff8880ba007790 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffff110080559e9 RDX: 0000000000000001 RSI: ffff8880402acf49 RDI: ffff8880402acf4a RBP: ffff8880402acf48 R08: 0000000000000001 R09: ffffed10080559e9 R10: ffff8880402acf4b R11: 000000006a06ec73 R12: 000000000000693c R13: ffffed10080559e9 R14: 0000000000000001 R15: ffff8880ba02be00 FS: 00007f51df043700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f51df044000 CR3: 0000000029c72000 CR4: 00000000003426f0 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: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 include/linux/spinlock.h:329 [inline] sctp_rcv+0x14b0/0x3300 net/sctp/input.c:243 ip_local_deliver_finish+0x495/0xc00 net/ipv4/ip_input.c:215 NF_HOOK include/linux/netfilter.h:289 [inline] ip_local_deliver+0x188/0x500 net/ipv4/ip_input.c:256 dst_input include/net/dst.h:461 [inline] ip_rcv_finish+0x1ca/0x2e0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] ip_rcv+0xca/0x3c0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 process_backlog+0x241/0x700 net/core/dev.c:5849 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:get_lock_parent_ip include/linux/ftrace.h:694 [inline] RIP: 0010:preempt_latency_start kernel/sched/core.c:3216 [inline] RIP: 0010:preempt_count_add+0xa2/0x190 kernel/sched/core.c:3241 Code: e2 0b 85 d2 75 11 65 8b 05 ab 70 c0 7e 0f b6 c0 3d f4 00 00 00 7f 64 65 8b 05 9a 70 c0 7e 25 ff ff ff 7f 39 c5 74 03 5b 5d c3 <48> 8b 5c 24 10 48 89 df e8 41 15 0a 00 85 c0 75 35 65 48 8b 2c 25 RSP: 0018:ffff888047ebf700 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888047ebf6a8 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 R10: ffff888047ebf8a7 R11: 0000000000074071 R12: ffff888047ebf890 R13: 0000000000000000 R14: ffff888047ebf848 R15: 0000000000000040 unwind_next_frame+0x135/0x1400 arch/x86/kernel/unwind_orc.c:407 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] kmem_cache_alloc_trace+0x11a/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] call_modprobe kernel/kmod.c:80 [inline] __request_module+0x31e/0xb80 kernel/kmod.c:171 get_fs_type+0xcc/0x180 fs/filesystems.c:268 do_new_mount fs/namespace.c:2488 [inline] do_mount+0x1139/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f51e06cf3ea Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f51df042f88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020001740 RCX: 00007f51e06cf3ea RDX: 0000000020000000 RSI: 0000000020000140 RDI: 00007f51df042fe0 RBP: 00007f51df043020 R08: 00007f51df043020 R09: 0000000020000000 R10: 0000000000000040 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000140 R14: 00007f51df042fe0 R15: 0000000020001800 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 31118 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rdtsc arch/x86/include/asm/msr.h:207 [inline] RIP: 0010:rdtsc_ordered arch/x86/include/asm/msr.h:232 [inline] RIP: 0010:pvclock_clocksource_read+0xc0/0x520 arch/x86/kernel/pvclock.c:87 Code: c1 e8 03 49 01 ed 4c 8d 5b 1b 48 01 e8 4c 8d 7b 10 48 89 44 24 20 4c 8d 53 17 4c 8d 73 1d 83 e2 fe 89 54 24 04 0f ae e8 0f 31 <48> c1 e2 20 48 8b 74 24 08 4c 89 c9 48 09 d0 41 0f b6 55 00 48 c1 RSP: 0018:ffff8880ba107158 EFLAGS: 00000002 RAX: 00000000d2b16dca RBX: ffffffff8c665040 RCX: 0000000000000001 RDX: 00000000000001a6 RSI: ffffffff8154936f RDI: ffffffff8c66505c RBP: dffffc0000000000 R08: ffffffff8c665058 R09: ffffffff8c66504f R10: ffffffff8c665057 R11: ffffffff8c66505b R12: ffffffff8c665043 R13: fffffbfff18cca09 R14: ffffffff8c66505d R15: ffffffff8c665050 FS: 00007fa2da457700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f51df001718 CR3: 00000000b4c7a000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kvm_clock_read arch/x86/kernel/kvmclock.c:94 [inline] kvm_clock_get_cycles+0x14/0x30 arch/x86/kernel/kvmclock.c:101 tk_clock_read kernel/time/timekeeping.c:172 [inline] timekeeping_get_delta kernel/time/timekeeping.c:266 [inline] timekeeping_get_ns kernel/time/timekeeping.c:373 [inline] ktime_get+0x188/0x2f0 kernel/time/timekeeping.c:758 hrtimer_forward_now include/linux/hrtimer.h:479 [inline] perf_swevent_hrtimer+0x318/0x3e0 kernel/events/core.c:9266 __run_hrtimer kernel/time/hrtimer.c:1465 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1527 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:pv_wait_node kernel/locking/qspinlock_paravirt.h:303 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x5ac/0xae0 kernel/locking/qspinlock.c:439 Code: 32 84 c0 75 23 41 0f b6 14 24 4c 89 e9 83 e1 07 38 ca 7f 08 84 d2 0f 85 b4 03 00 00 0f b6 53 44 84 d2 0f 85 9f 00 00 00 f3 90 <83> e8 01 0f 84 94 00 00 00 41 0f b6 10 40 38 d6 7c 08 84 d2 0f 85 RSP: 0018:ffff8880ba107790 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 00000000000023b7 RBX: ffff8880ba02be00 RCX: 0000000000000004 RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff8880ba12be08 RBP: ffff8880ba12be44 R08: ffffed10174257c1 R09: ffffed10174257c8 R10: ffff8880ba12be44 R11: 0000000000000000 R12: ffffed10174057c8 R13: ffff8880ba02be44 R14: dffffc0000000000 R15: ffff8880ba12be00 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 include/linux/spinlock.h:329 [inline] sctp_rcv+0x14b0/0x3300 net/sctp/input.c:243 ip_local_deliver_finish+0x495/0xc00 net/ipv4/ip_input.c:215 NF_HOOK include/linux/netfilter.h:289 [inline] ip_local_deliver+0x188/0x500 net/ipv4/ip_input.c:256 dst_input include/net/dst.h:461 [inline] ip_rcv_finish+0x1ca/0x2e0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] ip_rcv+0xca/0x3c0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 process_backlog+0x241/0x700 net/core/dev.c:5849 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3744 Code: 00 00 e8 3d 04 29 f9 e8 58 3f 4f f9 4c 89 e8 48 c1 e8 03 80 3c 18 00 75 69 48 83 3d 9b 18 d9 01 00 74 5b fb 66 0f 1f 44 00 00 01 00 00 00 e8 40 d1 ff ff 48 c7 c0 90 82 f1 89 48 c1 e8 03 80 RSP: 0018:ffff88808cfff140 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 1ffff11015c81d1d RDX: 0000000000000000 RSI: ffff8880ae40e8c8 RDI: ffff8880ae40e8c4 RBP: ffffed1015c81c08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae40e040 R13: ffffffff89f18298 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:should_resched arch/x86/include/asm/preempt.h:99 [inline] RIP: 0010:__local_bh_enable_ip+0x18d/0x270 kernel/softirq.c:196 Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 dd 00 00 00 48 83 3d c8 5f b8 08 00 0f 84 8d 00 00 00 fb 66 0f 1f 44 00 00 <65> 8b 05 6c bc c8 7e 85 c0 74 7d 5b 5d 41 5c c3 80 3d f3 87 d5 09 RSP: 0018:ffff88808cfff210 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: 0000000000000200 RCX: 1ffff11015c81d1d RDX: dffffc0000000000 RSI: ffff8880ae40e8c8 RDI: ffff8880ae40e8c4 RBP: ffffffff870217f6 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae40e040 R13: ffff8880509fa080 R14: 0000000000000000 R15: ffff88808ce91080 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:721 [inline] ip6_finish_output2+0x11a9/0x2290 net/ipv6/ip6_output.c:121 ip6_fragment+0x29bb/0x34e0 net/ipv6/ip6_output.c:761 ip6_finish_output+0x9da/0x10f0 net/ipv6/ip6_output.c:190 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] ip6_local_out+0xaf/0x170 net/ipv6/output_core.c:160 ip6_send_skb+0xb3/0x300 net/ipv6/ip6_output.c:1741 udp_v6_send_skb+0x7d7/0x1610 net/ipv6/udp.c:1114 udpv6_sendmsg+0x236b/0x2ae0 net/ipv6/udp.c:1411 inet_sendmsg+0x132/0x5a0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 sock_no_sendpage+0xf5/0x140 net/core/sock.c:2686 kernel_sendpage net/socket.c:3585 [inline] sock_sendpage+0xdf/0x140 net/socket.c:912 pipe_to_sendpage+0x268/0x330 fs/splice.c:452 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x389/0x800 fs/splice.c:627 splice_from_pipe fs/splice.c:662 [inline] generic_splice_sendpage+0xd4/0x140 fs/splice.c:833 do_splice_from fs/splice.c:852 [inline] do_splice fs/splice.c:1154 [inline] __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fa2dbb44eb9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa2da457168 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 00007fa2dbc581d0 RCX: 00007fa2dbb44eb9 RDX: 0000000000000013 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00007fa2dbb9f08d R08: 0000000100000002 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc6a0a2b1f R14: 00007fa2da457300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: eb c6 jmp 0xffffffc8 2: 45 01 01 add %r8d,(%r9) 5: 41 bc 00 80 00 00 mov $0x8000,%r12d b: 48 c1 e9 03 shr $0x3,%rcx f: 83 e3 07 and $0x7,%ebx 12: 41 be 01 00 00 00 mov $0x1,%r14d 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 4c 8d 2c 01 lea (%rcx,%rax,1),%r13 26: eb 0c jmp 0x34 28: f3 90 pause * 2a: 41 83 ec 01 sub $0x1,%r12d <-- trapping instruction 2e: 0f 84 38 04 00 00 je 0x46c 34: 41 0f b6 45 00 movzbl 0x0(%r13),%eax 39: 38 d8 cmp %bl,%al 3b: 7f 08 jg 0x45 3d: 84 c0 test %al,%al 3f: 0f .byte 0xf