INFO: task kworker/u4:6:1088 blocked for more than 143 seconds.
Not tainted 6.8.0-rc7-syzkaller-00017-g29cd507cbec2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:6 state:D stack:20920 pid:1088 tgid:1088 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:3)
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1ae/0x200 kernel/locking/rwsem.c:1306
f2fs_down_write fs/f2fs/f2fs.h:2138 [inline]
f2fs_balance_fs+0x500/0x730 fs/f2fs/segment.c:437
f2fs_write_inode+0x3f0/0x470 fs/f2fs/inode.c:794
write_inode fs/fs-writeback.c:1473 [inline]
__writeback_single_inode+0x69f/0xfd0 fs/fs-writeback.c:1690
writeback_sb_inodes+0x8e3/0x1220 fs/fs-writeback.c:1916
__writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:1987
wb_writeback+0x461/0xc80 fs/fs-writeback.c:2094
wb_check_old_data_flush fs/fs-writeback.c:2198 [inline]
wb_do_writeback fs/fs-writeback.c:2251 [inline]
wb_workfn+0xb7c/0xfb0 fs/fs-writeback.c:2279
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffff8880b943c918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
3 locks held by kworker/u4:0/11:
#0: ffff8880b943c918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9428988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
#2: ffff8880b9429898 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x6a1/0xfd0 kernel/time/timer.c:1112
1 lock held by khungtaskd/29:
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
4 locks held by kworker/u4:6/1088:
#0: ffff888018ad1d38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888018ad1d38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc9000400fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc9000400fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#2: ffff88802227e0e0 (&type->s_umount_key#59){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:561
#3: ffff88801e7c52a8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2138 [inline]
#3: ffff88801e7c52a8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x500/0x730 fs/f2fs/segment.c:437
2 locks held by getty/4819:
#0: ffff88802a9dd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by kworker/1:5/5145:
#0: ffff888014c7a538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888014c7a538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc900045cfd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc900045cfd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
6 locks held by syz-executor.3/16453:
1 lock held by syz-executor.3/18351:
1 lock held by syz-executor.2/18356:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc7-syzkaller-00017-g29cd507cbec2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 16453 Comm: syz-executor.3 Not tainted 6.8.0-rc7-syzkaller-00017-g29cd507cbec2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:103 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x64/0x290 mm/kasan/generic.c:189
Code: 48 c1 eb 03 49 ba 00 00 00 00 00 fc ff df 4e 8d 1c 13 49 ff c8 4d 89 c1 49 c1 e9 03 49 be 01 00 00 00 00 fc ff df 4f 8d 3c 31 <4c> 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c
RSP: 0018:ffffc90014f9e0b0 EFLAGS: 00000a03
RAX: 0000000000000001 RBX: 1ffff11027fff5a7 RCX: ffffffff81e584af
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88813fffad38
RBP: 000000000001ffff R08: ffff88813fffad3f R09: 1ffff11027fff5a7
R10: dffffc0000000000 R11: ffffed1027fff5a7 R12: dffffc0000000000
R13: ffff88813fffa740 R14: dffffc0000000001 R15: ffffed1027fff5a8
FS: 00007f083f7aa6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc3fedf000 CR3: 000000002d1ac000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
get_page_from_freelist+0x3ef/0x3580 mm/page_alloc.c:3247
__alloc_pages+0x255/0x680 mm/page_alloc.c:4567
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page+0x5f/0x160 mm/slub.c:2190
allocate_slab mm/slub.c:2354 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2407
___slab_alloc+0xd17/0x13e0 mm/slub.c:3540
__slab_alloc mm/slub.c:3625 [inline]
__slab_alloc_node mm/slub.c:3678 [inline]
slab_alloc_node mm/slub.c:3850 [inline]
kmem_cache_alloc+0x24d/0x340 mm/slub.c:3867
mempool_alloc+0x197/0x5a0 mm/mempool.c:408
bio_alloc_bioset+0x26b/0x1400 block/bio.c:543
f2fs_grab_read_bio+0x275/0x6d0 fs/f2fs/data.c:1116
f2fs_submit_page_read+0xac/0x190 fs/f2fs/data.c:1161
f2fs_get_read_data_page+0x50e/0x850 fs/f2fs/data.c:1340
f2fs_get_lock_data_page+0x52/0xe0 fs/f2fs/data.c:1388
move_data_page fs/f2fs/gc.c:1429 [inline]
gc_data_segment fs/f2fs/gc.c:1638 [inline]
do_garbage_collect+0x3926/0x80a0 fs/f2fs/gc.c:1763
f2fs_gc+0xeda/0x3140 fs/f2fs/gc.c:1866
f2fs_balance_fs+0x549/0x730 fs/f2fs/segment.c:439
f2fs_map_blocks+0x3ad8/0x43c0 fs/f2fs/data.c:1826
f2fs_expand_inode_data+0x5d0/0xb70 fs/f2fs/file.c:1739
f2fs_fallocate+0x407/0x6b0 fs/f2fs/file.c:1834
vfs_fallocate+0x564/0x6c0 fs/open.c:328
do_vfs_ioctl+0x22f4/0x2b60 fs/ioctl.c:850
__do_sys_ioctl fs/ioctl.c:869 [inline]
__se_sys_ioctl+0x81/0x170 fs/ioctl.c:857
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f083ea7dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f083f7aa0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f083ebabf80 RCX: 00007f083ea7dda9
RDX: 0000000020000100 RSI: 0000000040305828 RDI: 0000000000000004
RBP: 00007f083eaca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f083ebabf80 R15: 00007fff25c8b0b8