INFO: task kworker/u4:28:15883 blocked for more than 144 seconds.
Not tainted 5.15.110-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:28 state:D stack:19256 pid:15883 ppid: 2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
rwsem_down_write_slowpath+0xebb/0x15c0 kernel/locking/rwsem.c:1157
__down_write_common kernel/locking/rwsem.c:1284 [inline]
__down_write kernel/locking/rwsem.c:1293 [inline]
down_write+0x164/0x170 kernel/locking/rwsem.c:1542
f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
f2fs_write_inode+0x4c3/0x540 fs/f2fs/inode.c:727
write_inode fs/fs-writeback.c:1475 [inline]
__writeback_single_inode+0x644/0xe30 fs/fs-writeback.c:1680
writeback_sb_inodes+0xbf0/0x1a50 fs/fs-writeback.c:1905
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1976
wb_writeback+0x465/0xc50 fs/fs-writeback.c:2081
wb_check_old_data_flush fs/fs-writeback.c:2181 [inline]
wb_do_writeback fs/fs-writeback.c:2234 [inline]
wb_workfn+0xc55/0x1130 fs/fs-writeback.c:2263
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2306
worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c91c4e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3254:
#0: ffff88814b60a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
3 locks held by kworker/1:11/10654:
#0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
#1: ffffc90003f8fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
#2: ffffffff8c920a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#2: ffffffff8c920a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x350/0x740 kernel/rcu/tree_exp.h:840
3 locks held by kworker/1:19/10661:
#0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
#1: ffffc900042cfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
#2: ffffffff8c920a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#2: ffffffff8c920a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:840
2 locks held by kworker/u4:3/15716:
2 locks held by kworker/u4:7/15739:
#0: ffff888011c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
#1: ffffc900049c7d20 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
4 locks held by kworker/u4:28/15883:
#0: ffff8880149dc938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
#1: ffffc9000529fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
#2: ffff88804ae420e0 (&type->s_umount_key#106){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
#3: ffff88802dc65108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
2 locks held by syz-executor.0/17261:
1 lock held by syz-executor.4/20297:
#0: ffffffff8c941bd0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x285/0x2480 kernel/exit.c:828
1 lock held by syz-executor.4/20299:
#0: ffffffff8c941bd0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x285/0x2480 kernel/exit.c:828
1 lock held by syz-executor.4/20306:
#0: ffffffff8c941bd0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x285/0x2480 kernel/exit.c:828
1 lock held by syz-executor.4/20307:
#0: ffffffff8d9dbba8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x598/0xf60 net/core/dev_ioctl.c:611
1 lock held by syz-executor.4/20308:
#0: ffffffff8d9dbba8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x598/0xf60 net/core/dev_ioctl.c:611
1 lock held by syz-executor.4/20311:
#0: ffffffff8c941bd0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x285/0x2480 kernel/exit.c:828
1 lock held by syz-executor.1/20300:
#0: ffffffff8c941bd0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x2210/0x3ef0 kernel/fork.c:2299
1 lock held by syz-executor.1/20302:
#0: ffffffff8d9dbba8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d9dbba8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5584
1 lock held by syz-executor.5/20303:
#0: ffffffff8c941bd0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x2210/0x3ef0 kernel/fork.c:2299
1 lock held by syz-executor.2/20305:
#0: ffffffff8c941bd0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x2210/0x3ef0 kernel/fork.c:2299
1 lock held by modprobe/20309:
#0: ffffffff8c941bd0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x285/0x2480 kernel/exit.c:828
4 locks held by kvm-nx-lpage-re/20312:
#0: ffffffff8c9419e8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_attach_task_all+0x23/0x150 kernel/cgroup/cgroup-v1.c:61
#1: ffffffff8c7b9e10 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_attach_task_all+0x28/0x150 kernel/cgroup/cgroup-v1.c:62
#2: ffffffff8c941bd0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_task_all+0x34/0x150 kernel/cgroup/cgroup-v1.c:63
#3: ffffffff8c94dcb0 (&cpuset_rwsem){++++}-{0:0}, at: cpuset_can_attach+0x1e9/0x490 kernel/cgroup/cpuset.c:2197
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 17261 Comm: syz-executor.0 Not tainted 5.15.110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:kasan_check_range+0x1ac/0x290 mm/kasan/generic.c:189
Code: 4c 89 d5 48 8d 5d 07 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 39 00 0f 85 a2 00 00 00 49 ff c1 48 ff cd 75 ee 5b <41> 5e 41 5f 5d c3 45 84 f6 75 61 41 f7 c6 00 ff 00 00 75 5d 41 f7
RSP: 0018:ffffc90004d5db60 EFLAGS: 00000256
RAX: 1ffff110037a6901 RBX: dffffc0000000000 RCX: ffffffff8161a086
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888023f66460
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed10047ecc8d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888023f664c0
R13: ffff888023f66460 R14: ffffed10047ecc8d R15: ffffc90004d5dbc0
FS: 00007fcc880a1700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcc88080718 CR3: 000000001cd3c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
atomic_long_read include/linux/atomic/atomic-instrumented.h:1183 [inline]
rwsem_clear_reader_owned kernel/locking/rwsem.c:205 [inline]
__up_read+0x186/0x690 kernel/locking/rwsem.c:1318
check_valid_map fs/f2fs/gc.c:884 [inline]
gc_data_segment fs/f2fs/gc.c:1450 [inline]
do_garbage_collect+0x21cd/0x7600 fs/f2fs/gc.c:1670
f2fs_gc+0x9e5/0x1ad0 fs/f2fs/gc.c:1764
f2fs_balance_fs+0x4e8/0x6a0 fs/f2fs/segment.c:530
f2fs_write_single_data_page+0xc2a/0x1830 fs/f2fs/data.c:2866
f2fs_write_cache_pages fs/f2fs/data.c:3079 [inline]
__f2fs_write_data_pages fs/f2fs/data.c:3230 [inline]
f2fs_write_data_pages+0x17de/0x2c00 fs/f2fs/data.c:3257
do_writepages+0x481/0x730 mm/page-writeback.c:2364
filemap_fdatawrite_wbc+0x1d6/0x230 mm/filemap.c:400
__filemap_fdatawrite_range mm/filemap.c:433 [inline]
file_write_and_wait_range+0x1cb/0x2b0 mm/filemap.c:810
f2fs_do_sync_file+0x650/0x19d0 fs/f2fs/file.c:274
generic_write_sync include/linux/fs.h:2913 [inline]
f2fs_file_write_iter+0x476/0xb80 fs/f2fs/file.c:4357
__kernel_write+0x5b1/0xa60 fs/read_write.c:539
__dump_emit+0x264/0x3a0 fs/coredump.c:875
dump_user_range+0x91/0x320 fs/coredump.c:949
elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
do_coredump+0x1852/0x31e0 fs/coredump.c:826
get_signal+0xc06/0x14e0 kernel/signal.c:2875
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
exc_page_fault+0x342/0x740 arch/x86/mm/fault.c:1544
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0xb25a02
Code: Unable to access opcode bytes at RIP 0xb259d8.
RSP: 002b:00000000200001c8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fcc89c4ef80 RCX: 00007fcc89b2f169
RDX: 0000000020000040 RSI: 00000000200001c0 RDI: 000000001002a000
RBP: 00007fcc89b8aca1 R08: 0000000020000240 R09: 0000000020000240
R10: 00000000200000c0 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fffaa95e35f R14: 00007fcc880a1300 R15: 0000000000022000