watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.0.1291:4919]
Modules linked in:
CPU: 0 PID: 4919 Comm: syz.0.1291 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:update_stack_state+0x12f/0x4c0 arch/x86/kernel/unwind_frame.c:211
Code: 01 f8 48 89 85 60 ff ff ff 48 8d 53 18 48 8d 43 28 48 8d 73 20 48 89 b5 48 ff ff ff 4c 89 f6 48 c1 ee 03 48 89 b5 30 ff ff ff <48> 89 8d 58 ff ff ff 48 c1 e9 03 48 89 8d 38 ff ff ff 48 89 95 40
RSP: 0018:ffff8881f6e082b8 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13
RAX: ffff8881f6e08450 RBX: ffff8881f6e08428 RCX: ffff8881f6e08438
RDX: ffff8881f6e08440 RSI: 1ffff1103edc1086 RDI: ffff8881f6e08480
RBP: ffff8881f6e08388 R08: dffffc0000000000 R09: ffff8881f6e08428
R10: ffffed103edc1091 R11: 1ffff1103edc1085 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881f6e08430 R15: ffff8881f6e09ce8
FS:  00007fb34091a6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb3422b193f CR3: 00000001ec84b000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x3f7/0x760 arch/x86/kernel/unwind_frame.c:311
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xaa/0xf0 kernel/stacktrace.c:123
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 kasan_set_free_info mm/kasan/common.c:345 [inline]
 __kasan_slab_free+0x1c3/0x280 mm/kasan/common.c:487
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:496
 slab_free_hook mm/slub.c:1455 [inline]
 slab_free_freelist_hook+0xb7/0x180 mm/slub.c:1494
 slab_free mm/slub.c:3080 [inline]
 kfree+0xbe/0x260 mm/slub.c:4071
 skb_free_head net/core/skbuff.c:601 [inline]
 skb_release_data+0x4ea/0x610 net/core/skbuff.c:621
 skb_release_all net/core/skbuff.c:675 [inline]
 __kfree_skb net/core/skbuff.c:689 [inline]
 consume_skb+0xad/0x240 net/core/skbuff.c:849
 __dev_kfree_skb_any+0x11b/0x140 net/core/dev.c:2748
 dev_consume_skb_any include/linux/netdevice.h:3714 [inline]
 napi_consume_skb+0x238/0x490 net/core/skbuff.c:913
 free_old_xmit_skbs+0x108/0x270 drivers/net/virtio_net.c:1450
 start_xmit+0x11f/0x1430 drivers/net/virtio_net.c:1669
 __netdev_start_xmit include/linux/netdevice.h:4544 [inline]
 netdev_start_xmit include/linux/netdevice.h:4558 [inline]
 xmit_one net/core/dev.c:3221 [inline]
 dev_hard_start_xmit+0x1ef/0x6f0 net/core/dev.c:3237
 sch_direct_xmit+0x24b/0x8b0 net/sched/sch_generic.c:336
 qdisc_restart net/sched/sch_generic.c:401 [inline]
 __qdisc_run+0x954/0x1370 net/sched/sch_generic.c:409
 qdisc_run+0x10a/0x300 include/net/pkt_sched.h:122
 __dev_xmit_skb net/core/dev.c:3432 [inline]
 __dev_queue_xmit+0x9dd/0x2400 net/core/dev.c:3787
 dev_queue_xmit+0x17/0x20 net/core/dev.c:3854
 arp_xmit_finish net/ipv4/arp.c:632 [inline]
 NF_HOOK include/linux/netfilter.h:303 [inline]
 arp_xmit+0xcd/0x1f0 net/ipv4/arp.c:642
 arp_send_dst+0x1fd/0x290 net/ipv4/arp.c:319
 arp_solicit+0x77e/0x980 net/ipv4/arp.c:391
 neigh_probe net/core/neighbour.c:1022 [inline]
 __neigh_event_send+0xd76/0x1360 net/core/neighbour.c:1182
 neigh_event_send include/net/neighbour.h:447 [inline]
 neigh_resolve_output+0x1d4/0x780 net/core/neighbour.c:1491
 neigh_output include/net/neighbour.h:518 [inline]
 ip_finish_output2+0xafe/0xef0 net/ipv4/ip_output.c:236
 __ip_finish_output+0x3fb/0x720 net/ipv4/ip_output.c:258
 ip_finish_output+0x33/0x1f0 net/ipv4/ip_output.c:326
 NF_HOOK_COND include/linux/netfilter.h:292 [inline]
 ip_output+0x1a2/0x310 net/ipv4/ip_output.c:440
 dst_output include/net/dst.h:438 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0x108c/0x1ae0 net/ipv4/ip_output.c:541
 ip_queue_xmit+0x4d/0x70 include/net/ip.h:242
 __tcp_transmit_skb+0x1c3d/0x3130 net/ipv4/tcp_output.c:1179
 tcp_transmit_skb net/ipv4/tcp_output.c:1195 [inline]
 __tcp_retransmit_skb+0xaba/0x13c0 net/ipv4/tcp_output.c:3039
 tcp_retransmit_skb+0x34/0x320 net/ipv4/tcp_output.c:3062
 tcp_retransmit_timer+0x13d4/0x2520 net/ipv4/tcp_timer.c:571
 tcp_write_timer_handler+0x1fb/0x970 net/ipv4/tcp_timer.c:656
 tcp_write_timer+0xaa/0x1d0 net/ipv4/tcp_timer.c:676
 call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x81d/0xb60 kernel/time/timer.c:1817
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x236/0x660 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x197/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:preempt_schedule_irq+0x96/0x110 kernel/sched/core.c:4560
Code: 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 74 0b 0f 0b 48 f7 03 08 00 00 00 74 4d bf 01 00 00 00 e8 90 21 17 fd fb bf 01 00 00 00 <e8> b5 e7 ff ff fa bf 01 00 00 00 e8 2a 23 17 fd 65 48 8b 1d 32 3c
RSP: 0018:ffff8881e54a74c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff1103878c90f RBX: 0000000000000000 RCX: ffffffff86542900
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff8881e54a7538 R08: dffffc0000000000 R09: ffffed103edcaf6d
R10: ffffed103edcaf6d R11: 1ffff1103edcaf6c R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff1103ca94e98
 retint_kernel+0x1b/0x1b
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x1/0x80 kernel/kcov.c:273
Code: 44 01 08 03 00 00 00 4a 89 7c 01 10 4a 89 74 01 18 4a 89 44 01 20 48 ff c2 48 89 11 5d c3 66 66 2e 0f 1f 84 00 00 00 00 00 55 <48> 89 e5 48 8b 45 08 65 48 8b 15 40 0b a3 7e 65 8b 0d 45 0b a3 7e
RSP: 0018:ffff8881e54a75f0 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff02
RAX: ffffffff8191b015 RBX: ffff8881e54a7640 RCX: 0000000000000000
RDX: ffff8881c3c63f00 RSI: 0000000000000010 RDI: 000000000000000c
RBP: ffff8881e54a7730 R08: dffffc0000000000 R09: ffff8881e54a74a8
R10: ffffed103ca94ea1 R11: 1ffff1103ca94e95 R12: ffffffff8191ab03
R13: ffffffff8125359d R14: 1ffff1103ca94ec4 R15: 0000000000000010
 __reset_page_owner+0x23/0x110 mm/page_owner.c:149
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 free_pcp_prepare mm/page_alloc.c:1233 [inline]
 free_unref_page_prepare+0x2a9/0x3a0 mm/page_alloc.c:3085
 free_unref_page mm/page_alloc.c:3134 [inline]
 free_the_page mm/page_alloc.c:4954 [inline]
 __free_pages+0xaa/0x110 mm/page_alloc.c:4962
 __vunmap+0x76a/0x8a0 mm/vmalloc.c:2260
 __vfree mm/vmalloc.c:2308 [inline]
 vfree+0x61/0x90 mm/vmalloc.c:2338
 kcov_put kernel/kcov.c:396 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:495
 __fput+0x2a3/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x146/0x170 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xa43/0x2660 kernel/exit.c:861
 do_group_exit+0x13e/0x300 kernel/exit.c:984
 get_signal+0xdee/0x13d0 kernel/signal.c:2738
 do_signal+0xad/0xda0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xc4/0x1b0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x18e/0x1f0 arch/x86/entry/common.c:194
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x13e/0x170 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fb3422b1969
Code: Bad RIP value.
RSP: 002b:00007fb34091a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: fffffffffffffff5 RBX: 00007fb3424d8fa0 RCX: 00007fb3422b1969
RDX: 0000000000000048 RSI: 0000200000000200 RDI: 0000000000000005
RBP: 00007fb342333ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb3424d8fa0 R15: 00007ffed2a2e358
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 327 Comm: sshd Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #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:852
Code: 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 2f 5f 59 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d 20 5f 59 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:ffff8881f47d7720 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff8881def5b148 RCX: ffffffff8148437a
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8881def5b148
RBP: ffff8881f47d77d0 R08: dffffc0000000000 R09: ffffed103bdeb62a
R10: ffffed103bdeb62a R11: 1ffff1103bdeb629 R12: 0000000000000246
R13: 1ffff1103bdeb629 R14: dffffc0000000000 R15: 1ffff1103e8faee8
FS:  00007f7c433c8800(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe4977efd8 CR3: 00000001f51f5000 CR4: 00000000003406a0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 pv_wait arch/x86/include/asm/paravirt.h:652 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x714/0xb70 kernel/locking/qspinlock.c:507
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:642 [inline]
 queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:50
 queued_spin_lock include/asm-generic/qspinlock.h:81 [inline]
 do_raw_spin_lock include/linux/spinlock.h:181 [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:343 [inline]
 lock_sock_nested+0x92/0x290 net/core/sock.c:3008
 lock_sock include/net/sock.h:1576 [inline]
 tcp_sendmsg+0x21/0x50 net/ipv4/tcp.c:1449
 inet_sendmsg+0xa5/0xc0 net/ipv4/af_inet.c:817
 sock_sendmsg_nosec net/socket.c:638 [inline]
 __sock_sendmsg net/socket.c:650 [inline]
 sock_write_iter+0x2a2/0x390 net/socket.c:1009
 call_write_iter include/linux/fs.h:1991 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x480/0x5d0 fs/read_write.c:496
 vfs_write+0x20e/0x4c0 fs/read_write.c:558
 ksys_write+0x140/0x240 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:620
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f7c434f4bf2
Code: 89 c7 48 89 44 24 08 e8 7b 34 fa ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6f 48 8b 15 07 a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffe49783968 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000000007c RCX: 00007f7c434f4bf2
RDX: 000000000000007c RSI: 00005609ba01aa00 RDI: 0000000000000004
RBP: 00005609ba0282c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000560987cbcaa4
R13: 0000000000000318 R14: 0000560987cbd3e8 R15: 00007ffe497839d8