INFO: task kcompactd0:32 blocked for more than 143 seconds.
Not tainted 6.6.0-rc7-syzkaller-00018-gd88520ad73b7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0 state:D stack:26384 pid:32 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x5a10 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
io_schedule+0xbe/0x130 kernel/sched/core.c:9026
folio_wait_bit_common+0x3dc/0x9c0 mm/filemap.c:1301
folio_lock include/linux/pagemap.h:1042 [inline]
migrate_folio_unmap mm/migrate.c:1158 [inline]
migrate_pages_batch+0x113c/0x2c90 mm/migrate.c:1660
migrate_pages_sync mm/migrate.c:1847 [inline]
migrate_pages+0x1d93/0x27c0 mm/migrate.c:1929
compact_zone+0x1dd2/0x4020 mm/compaction.c:2515
proactive_compact_node+0x118/0x1d0 mm/compaction.c:2780
kcompactd+0x710/0xd80 mm/compaction.c:3100
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by kworker/u4:12/2818:
#0: ffff888012c71938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc9000ab37d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
2 locks held by udevd/4492:
2 locks held by getty/4789:
#0: ffff88814cd480a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
3 locks held by kworker/0:1/25526:
#0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc900164afd80 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff888058d1b240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1bb/0x26e0 drivers/net/netdevsim/fib.c:1489
2 locks held by kworker/1:2/6005:
#0: ffff888012c72938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc9000a6b7d80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
1 lock held by syz-executor.4/27837:
1 lock held by syz-executor.3/28374:
#0: ffff888082fce0e0 (&type->s_umount_key#92){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888082fce0e0 (&type->s_umount_key#92){++++}-{3:3}, at: super_lock+0x23c/0x380 fs/super.c:117
6 locks held by syz-executor.3/28465:
#0: ffff88801c484410 (sb_writers#10){.+.+}-{0:0}, at: ksys_write+0x12f/0x250 fs/read_write.c:637
#1: ffff888029d36488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x281/0x610 fs/kernfs/file.c:325
#2: ffffffff8cbf64e8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:369 [inline]
#2: ffffffff8cbf64e8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_kn_lock_live+0x136/0x570 kernel/cgroup/cgroup.c:1645
#3: ffffffff8ca50230 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2382 [inline]
#3: ffffffff8ca50230 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_procs_write_start+0x18f/0x660 kernel/cgroup/cgroup.c:2886
#4: ffffffff8cbf62b0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2384 [inline]
#4: ffffffff8cbf62b0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2380 [inline]
#4: ffffffff8cbf62b0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_procs_write_start+0x19b/0x660 kernel/cgroup/cgroup.c:2886
#5: ffffffff8cbb6bb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#5: ffffffff8cbb6bb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x69e/0x7e0 kernel/rcu/tree_exp.h:992
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc7-syzkaller-00018-gd88520ad73b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6005 Comm: kworker/1:2 Not tainted 6.6.0-rc7-syzkaller-00018-gd88520ad73b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:unwind_next_frame+0x5c0/0x2390 arch/x86/kernel/unwind_orc.c:505
Code: 85 c0 49 89 c4 0f 84 99 fd ff ff e8 5a 7e 4d 00 4d 8d 6c 24 05 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 0f b6 04 02 <4c> 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 1d 19 00 00 45 0f b6 74
RSP: 0018:ffffc900001f0700 EFLAGS: 00000212
RAX: 0000000000000000 RBX: ffffc900001f0780 RCX: 0000000000000100
RDX: 1ffffffff1fc5c20 RSI: ffffffff813a5bd6 RDI: 0000000000000006
RBP: 0000000000000001 R08: 0000000000000006 R09: ffffffff88febce4
R10: ffffffff88febb2e R11: 0000000000000000 R12: ffffffff8fe2e0fe
R13: ffffffff8fe2e103 R14: 000000000018cb01 R15: ffffc900001f07b5
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f16f77208 CR3: 000000001734a000 CR4: 0000000000350ee0
Call Trace:
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
kmem_cache_free+0xf0/0x480 mm/slub.c:3831
skb_kfree_head net/core/skbuff.c:943 [inline]
skb_kfree_head net/core/skbuff.c:940 [inline]
skb_free_head+0x17f/0x1b0 net/core/skbuff.c:957
skb_release_data+0x5ba/0x870 net/core/skbuff.c:987
skb_release_all net/core/skbuff.c:1053 [inline]
__kfree_skb net/core/skbuff.c:1067 [inline]
consume_skb net/core/skbuff.c:1283 [inline]
consume_skb+0xd2/0x170 net/core/skbuff.c:1277
mac80211_hwsim_tx_frame+0x1f3/0x2a0 drivers/net/wireless/virtual/mac80211_hwsim.c:2172
mac80211_hwsim_beacon_tx+0x41b/0x730 drivers/net/wireless/virtual/mac80211_hwsim.c:2264
__iterate_interfaces+0x2d2/0x580 net/mac80211/util.c:766
ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 net/mac80211/util.c:802
mac80211_hwsim_beacon+0x101/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2290
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x203/0xc10 kernel/time/hrtimer.c:1752
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1769
__do_softirq+0x218/0x965 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1074
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x70 kernel/kcov.c:207
Code: 81 e1 00 01 00 00 65 48 8b 14 25 c0 bc 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 04 16 00 00 85 c0 74 2b 8b 82 e0 15 00 00 <83> f8 02 75 20 48 8b 8a e8 15 00 00 8b 92 e4 15 00 00 48 8b 01 48
RSP: 0018:ffffc9000a6b7010 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9000a6b7688 RCX: 0000000000000000
RDX: ffff888081ced940 RSI: ffffffff813a4b19 RDI: ffffc9000a6b7688
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8fd68644
R13: ffffc9000a6b7690 R14: ffffffff8fd68648 R15: 0000000000000001
__read_once_word_nocheck+0x9/0x10 include/asm-generic/rwonce.h:67
deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline]
unwind_next_frame+0xdaf/0x2390 arch/x86/kernel/unwind_orc.c:585
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
save_stack+0x160/0x1f0 mm/page_owner.c:128
__reset_page_owner+0x5a/0x190 mm/page_owner.c:149
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
__unfreeze_partials+0x21d/0x240 mm/slub.c:2655
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook mm/slab.h:762 [inline]
slab_alloc_node mm/slub.c:3478 [inline]
kmem_cache_alloc_node+0x180/0x3f0 mm/slub.c:3523
__alloc_skb+0x287/0x330 net/core/skbuff.c:640
alloc_skb include/linux/skbuff.h:1286 [inline]
alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6313
sock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2795
sock_alloc_send_skb include/net/sock.h:1883 [inline]
mld_newpack.isra.0+0x1ee/0x790 net/ipv6/mcast.c:1746
add_grhead+0x295/0x340 net/ipv6/mcast.c:1849
add_grec+0x10bb/0x1680 net/ipv6/mcast.c:1987
mld_send_initial_cr.part.0+0xe2/0x260 net/ipv6/mcast.c:2234
mld_send_initial_cr include/linux/refcount.h:201 [inline]
ipv6_mc_dad_complete+0x255/0x2b0 net/ipv6/mcast.c:2245
addrconf_dad_completed+0xcd8/0xfe0 net/ipv6/addrconf.c:4271
addrconf_dad_work+0x807/0x13e0 net/ipv6/addrconf.c:4199
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304