INFO: task khugepaged:33 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khugepaged state:D stack:23984 pid: 33 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
__flush_work+0x56c/0xb10 kernel/workqueue.c:3084
__lru_add_drain_all+0x3fd/0x760 mm/swap.c:848
khugepaged_do_scan mm/khugepaged.c:2222 [inline]
khugepaged+0x112/0x5390 mm/khugepaged.c:2283
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b983a20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by khugepaged/33:
#0: ffffffff8ba6b428 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x65/0x760 mm/swap.c:797
1 lock held by in:imklog/6216:
2 locks held by rs:main Q:Reg/6218:
#0: ffff8880119dfc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffff88814aeca460 (sb_writers#5){.+.+}-{0:0}, at: ksys_write+0x12d/0x250 fs/read_write.c:643
5 locks held by syz-executor.1/24905:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
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: 24905 Comm: syz-executor.1 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:seqcount_lockdep_reader_access include/linux/seqlock.h:105 [inline]
RIP: 0010:timekeeping_get_delta kernel/time/timekeeping.c:252 [inline]
RIP: 0010:timekeeping_get_ns kernel/time/timekeeping.c:386 [inline]
RIP: 0010:ktime_get_update_offsets_now+0x178/0x5c0 kernel/time/timekeeping.c:2300
Code: 8b 74 24 78 48 c7 c7 c8 2d 9a 8b e8 52 ed f4 ff 5a e8 0c d9 0f 00 9c 41 5c 41 81 e4 00 02 00 00 31 ff 4c 89 e6 e8 88 db 0f 00 <4d> 85 e4 0f 85 61 03 00 00 e8 ea d8 0f 00 31 ff 48 89 de e8 70 db
RSP: 0018:ffffc90000dbfa60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88802708ba00 RDI: 0000000000000003
RBP: 000000000008e362 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8167ed78 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880b9d2a44c R14: 0000000000000000 R15: dffffc0000000000
FS: 00007f7e0ef96700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c621000 CR3: 000000002c6af000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
hrtimer_update_base kernel/time/hrtimer.c:631 [inline]
hrtimer_interrupt+0x142/0x790 kernel/time/hrtimer.c:1793
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:dev_nit_active net/core/dev.c:2259 [inline]
RIP: 0010:xmit_one net/core/dev.c:3584 [inline]
RIP: 0010:dev_hard_start_xmit+0x5e2/0x920 net/core/dev.c:3606
Code: 0f 84 bf fd ff ff 48 8b 5c 24 08 e9 96 fa ff ff e8 23 ae 54 fa 48 8b 44 24 28 80 38 00 0f 85 02 03 00 00 49 8b 85 80 00 00 00 <48> 39 44 24 20 0f 85 b0 fa ff ff e9 bb fa ff ff e8 f9 ad 54 fa 65
RSP: 0018:ffffc90000dbfc60 EFLAGS: 00000246
RAX: ffff888013fba080 RBX: ffff8880294e5c80 RCX: 0000000000000100
RDX: ffff88802708ba00 RSI: ffffffff8723184d RDI: ffff8880294e5c80
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff87232849 R11: 0000000000000000 R12: ffff88807d2c10c0
R13: ffff888013fba000 R14: ffff888013fba0e0 R15: 0000000000001000
__dev_queue_xmit+0x299a/0x3630 net/core/dev.c:4226
br_dev_queue_push_xmit+0x25a/0x740 net/bridge/br_forward.c:53
br_nf_dev_queue_xmit+0x41c/0x1f30 net/bridge/br_netfilter_hooks.c:808
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
br_nf_post_routing+0xf30/0x1b40 net/bridge/br_netfilter_hooks.c:854
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:619
nf_hook+0x3d4/0x680 include/linux/netfilter.h:262
NF_HOOK include/linux/netfilter.h:305 [inline]
br_forward_finish+0x7f/0xd0 net/bridge/br_forward.c:66
br_nf_hook_thresh+0x2a5/0x360 net/bridge/br_netfilter_hooks.c:1025
br_nf_forward_finish+0x7b3/0xc40 net/bridge/br_netfilter_hooks.c:564
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
br_nf_forward_ip net/bridge/br_netfilter_hooks.c:634 [inline]
br_nf_forward_ip+0x538/0x1cb0 net/bridge/br_netfilter_hooks.c:575
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:619
nf_hook+0x3d4/0x680 include/linux/netfilter.h:262
NF_HOOK include/linux/netfilter.h:305 [inline]
__br_forward+0x198/0x620 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver+0x331/0x430 net/bridge/br_forward.c:189
br_flood+0x13a/0x450 net/bridge/br_forward.c:231
br_handle_frame_finish+0xf66/0x1850 net/bridge/br_input.c:168
br_nf_hook_thresh+0x2a5/0x360 net/bridge/br_netfilter_hooks.c:1025
br_nf_pre_routing_finish_ipv6+0x684/0xe00 net/bridge/br_netfilter_ipv6.c:206
NF_HOOK include/linux/netfilter.h:307 [inline]
br_nf_pre_routing_ipv6+0x42c/0x7b0 net/bridge/br_netfilter_ipv6.c:236
br_nf_pre_routing+0x1477/0x1ec0 net/bridge/br_netfilter_hooks.c:505
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:230 [inline]
br_handle_frame+0x8f8/0x1180 net/bridge/br_input.c:370
__netif_receive_skb_core+0x9e1/0x3770 net/core/dev.c:5356
__netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5460
__netif_receive_skb+0x24/0x1b0 net/core/dev.c:5576
process_backlog+0x2a5/0x6c0 net/core/dev.c:6452
__napi_poll+0xaf/0x440 net/core/dev.c:7020
napi_poll net/core/dev.c:7087 [inline]
net_rx_action+0x801/0xb40 net/core/dev.c:7174
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__local_bh_enable_ip+0xa8/0x120 kernel/softirq.c:390
Code: 1d 8d 90 bb 7e 65 8b 05 86 90 bb 7e a9 00 ff ff 00 74 45 bf 01 00 00 00 e8 b5 3b 09 00 e8 90 2a 37 00 fb 65 8b 05 68 90 bb 7e <85> c0 74 58 5b 5d c3 65 8b 05 b6 97 bb 7e 85 c0 75 a2 0f 0b eb 9e
RSP: 0018:ffffc90002adf3a8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 00000000fffffe01 RCX: 1ffffffff1ae1b29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff87d9ece1 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817e0a58 R11: 0000000000000001 R12: 0000000000000050
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000010
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:758 [inline]
ip6_finish_output2+0x5bf/0x14e0 net/ipv6/ip6_output.c:127
ip6_fragment+0x2002/0x2700 net/ipv6/ip6_output.c:907
__ip6_finish_output net/ipv6/ip6_output.c:189 [inline]
__ip6_finish_output+0x5fa/0x1050 net/ipv6/ip6_output.c:170
ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201
NF_HOOK_COND include/linux/netfilter.h:296 [inline]
ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224
dst_output include/net/dst.h:450 [inline]
ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:161
ip6_send_skb+0xb7/0x340 net/ipv6/ip6_output.c:1912
udp_v6_send_skb+0x7c3/0x15e0 net/ipv6/udp.c:1249
udpv6_sendmsg+0x2319/0x2c40 net/ipv6/udp.c:1547
inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:644
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
___sys_sendmsg+0xf3/0x170 net/socket.c:2463
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7e10020ae9
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:00007f7e0ef96188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7e10133f60 RCX: 00007f7e10020ae9
RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000003
RBP: 00007f7e1007aff7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffb8b3425f R14: 00007f7e0ef96300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 8b 74 24 78 mov 0x78(%rsp),%esi
4: 48 c7 c7 c8 2d 9a 8b mov $0xffffffff8b9a2dc8,%rdi
b: e8 52 ed f4 ff callq 0xfff4ed62
10: 5a pop %rdx
11: e8 0c d9 0f 00 callq 0xfd922
16: 9c pushfq
17: 41 5c pop %r12
19: 41 81 e4 00 02 00 00 and $0x200,%r12d
20: 31 ff xor %edi,%edi
22: 4c 89 e6 mov %r12,%rsi
25: e8 88 db 0f 00 callq 0xfdbb2
* 2a: 4d 85 e4 test %r12,%r12 <-- trapping instruction
2d: 0f 85 61 03 00 00 jne 0x394
33: e8 ea d8 0f 00 callq 0xfd922
38: 31 ff xor %edi,%edi
3a: 48 89 de mov %rbx,%rsi
3d: e8 .byte 0xe8
3e: 70 db jo 0x1b