INFO: task kworker/u4:2:42 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:2 state:D stack:26576 pid: 42 ppid: 2 flags:0x00004000
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x916/0x2700 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x378/0x530 kernel/sched/completion.c:106
__synchronize_srcu+0x1f2/0x290 kernel/rcu/srcutree.c:1170
fsnotify_connector_destroy_workfn+0x4a/0xa0 fs/notify/mark.c:208
process_one_work+0x865/0x13d0 kernel/workqueue.c:2289
process_scheduled_works kernel/workqueue.c:2352 [inline]
worker_thread+0x738/0xec0 kernel/workqueue.c:2438
kthread+0x299/0x340 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
INFO: task kworker/u4:6:1281 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:6 state:D stack:25432 pid: 1281 ppid: 2 flags:0x00004000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x916/0x2700 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
schedule_timeout+0x19d/0x250 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x378/0x530 kernel/sched/completion.c:106
__synchronize_srcu+0x1f2/0x290 kernel/rcu/srcutree.c:1170
fsnotify_mark_destroy_workfn+0xeb/0x3b0 fs/notify/mark.c:898
process_one_work+0x865/0x13d0 kernel/workqueue.c:2289
process_scheduled_works kernel/workqueue.c:2352 [inline]
worker_thread+0x738/0xec0 kernel/workqueue.c:2438
kthread+0x299/0x340 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Showing all locks held in the system:
3 locks held by kworker/0:0/6:
1 lock held by khungtaskd/29:
#0: ffffffff8af7afe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
1 lock held by khugepaged/35:
#0: ffffffff8b061ec8 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x57/0x6d0 mm/swap.c:790
2 locks held by kworker/u4:2/42:
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x78a/0x13d0 kernel/workqueue.c:2260
#1: ffffc90000b37db8 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x7b7/0x13d0 kernel/workqueue.c:2264
2 locks held by kworker/u4:6/1281:
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x78a/0x13d0 kernel/workqueue.c:2260
#1: ffffc90005d97db8 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x7b7/0x13d0 kernel/workqueue.c:2264
2 locks held by getty/3320:
#0: ffff88802529d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900029162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb14/0x1040 drivers/tty/n_tty.c:2124
2 locks held by dhcpcd/9024:
#0: ffff888079372130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff888079372130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3194
#1: ffffffff8af852e0 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#1: ffffffff8af852e0 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f8/0x610 kernel/rcu/tree_exp.h:927
2 locks held by dhcpcd/9065:
#0: ffff8880799f2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff8880799f2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3194
#1: ffffffff8af852e0 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#1: ffffffff8af852e0 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d3/0x610 kernel/rcu/tree_exp.h:927
1 lock held by dhcpcd/9082:
#0: ffff88806289c130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88806289c130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/9095:
#0: ffff88805e96a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88805e96a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/9106:
#0: ffff88801ad96130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88801ad96130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/9133:
#0: ffff888062d42130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff888062d42130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/9742:
#0: ffff88805f542130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88805f542130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/9753:
#0: ffff88805d744130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88805d744130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/9824:
#0: ffff88801c3e8130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88801c3e8130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/9849:
#0: ffff88805ee26130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88805ee26130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3194
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc3-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+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x140/0x170 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0x891/0xc20 kernel/hung_task.c:378
kthread+0x299/0x340 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 5.19.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rt6_score_route+0x60/0x2d0 net/ipv6/route.c:717
Code: 49 8d bc 24 d8 00 00 00 49 89 f8 49 c1 e8 03 41 0f b6 04 00 84 c0 74 08 3c 03 0f 8e 8b 01 00 00 41 39 94 24 d8 00 00 00 74 0d c1 01 0f 85 45 02 00 00 31 c0 eb 05 b8 02 00 00 00 41 89 f4 41
RSP: 0018:ffffc900001474a8 EFLAGS: 00000283
RAX: 0000000000000000 RBX: ffff8880620804a8 RCX: 0000000000000003
RDX: 0000000000000dda RSI: 0000000000000001 RDI: ffff8880621880d8
RBP: ffffc90000147550 R08: 1ffff1100c43101b R09: ffffc90000147730
R10: ffff88801b026400 R11: 0000000000000001 R12: ffff888062188000
R13: 0000000000000001 R14: ffffc90000147740 R15: ffff8880651d0000
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000052f7b0 CR3: 000000000ac8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
find_match.part.0+0xf3/0xb20 net/ipv6/route.c:746
find_match net/ipv6/route.c:828 [inline]
__find_rr_leaf+0x14f/0xa40 net/ipv6/route.c:829
find_rr_leaf net/ipv6/route.c:850 [inline]
rt6_select net/ipv6/route.c:894 [inline]
fib6_table_lookup+0x44d/0x7e0 net/ipv6/route.c:2182
ip6_pol_route+0x17d/0xdc0 net/ipv6/route.c:2218
pol_lookup_func include/net/ip6_fib.h:582 [inline]
fib6_rule_lookup+0xfb/0x630 net/ipv6/fib6_rules.c:116
ip6_route_input_lookup net/ipv6/route.c:2287 [inline]
ip6_route_input+0x547/0x9e0 net/ipv6/route.c:2583
ip6_rcv_finish net/ipv6/ip6_input.c:74 [inline]
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0x1b6/0x320 net/ipv6/ip6_input.c:306
__netif_receive_skb_one_core+0x104/0x180 net/core/dev.c:5480
process_backlog+0x2e4/0x6d0 net/core/dev.c:5922
__napi_poll+0x96/0x510 net/core/dev.c:6488
napi_poll net/core/dev.c:6555 [inline]
net_rx_action+0x886/0xc70 net/core/dev.c:6666
__do_softirq+0x29b/0x9c2 kernel/softirq.c:571
run_ksoftirqd kernel/softirq.c:934 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926
smpboot_thread_fn+0x548/0x8c0 kernel/smpboot.c:164
kthread+0x299/0x340 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
----------------
Code disassembly (best guess):
0: 49 8d bc 24 d8 00 00 lea 0xd8(%r12),%rdi
7: 00
8: 49 89 f8 mov %rdi,%r8
b: 49 c1 e8 03 shr $0x3,%r8
f: 41 0f b6 04 00 movzbl (%r8,%rax,1),%eax
14: 84 c0 test %al,%al
16: 74 08 je 0x20
18: 3c 03 cmp $0x3,%al
1a: 0f 8e 8b 01 00 00 jle 0x1ab
20: 41 39 94 24 d8 00 00 cmp %edx,0xd8(%r12)
27: 00
28: 74 0d je 0x37
* 2a: f6 c1 01 test $0x1,%cl <-- trapping instruction
2d: 0f 85 45 02 00 00 jne 0x278
33: 31 c0 xor %eax,%eax
35: eb 05 jmp 0x3c
37: b8 02 00 00 00 mov $0x2,%eax
3c: 41 89 f4 mov %esi,%r12d
3f: 41 rex.B