INFO: task kworker/u4:1:11 blocked for more than 144 seconds.
Not tainted 6.1.21-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:1 state:D stack:22880 pid:11 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:1)
Call Trace:
context_switch kernel/sched/core.c:5238 [inline]
__schedule+0x132c/0x4330 kernel/sched/core.c:6551
schedule+0xbf/0x180 kernel/sched/core.c:6627
rwsem_down_write_slowpath+0xe93/0x14a0 kernel/locking/rwsem.c:1189
f2fs_down_write fs/f2fs/f2fs.h:2207 [inline]
f2fs_balance_fs+0x4fb/0x6c0 fs/f2fs/segment.c:418
f2fs_write_inode+0x4c3/0x540 fs/f2fs/inode.c:757
write_inode fs/fs-writeback.c:1440 [inline]
__writeback_single_inode+0x67d/0x11e0 fs/fs-writeback.c:1652
writeback_sb_inodes+0xc21/0x1ac0 fs/fs-writeback.c:1878
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1949
wb_writeback+0x4b1/0xe10 fs/fs-writeback.c:2054
wb_check_old_data_flush fs/fs-writeback.c:2154 [inline]
wb_do_writeback fs/fs-writeback.c:2207 [inline]
wb_workfn+0xbec/0x1020 fs/fs-writeback.c:2235
process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2289
worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
kthread+0x268/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Showing all locks held in the system:
4 locks held by kworker/u4:1/11:
#0: ffff888017e0b938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77a/0x11f0
#1: ffffc90000107d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7bd/0x11f0 kernel/workqueue.c:2264
#2: ffff88807a2da0e0 (&type->s_umount_key#57){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:415
#3: ffff88807c209140 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2207 [inline]
#3: ffff88807c209140 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4fb/0x6c0 fs/f2fs/segment.c:418
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cf26870 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cf27070 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8cf266a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3311:
#0: ffff888027e8c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2177
2 locks held by kworker/0:16/7747:
#0: ffff888012466538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77a/0x11f0
#1: ffffc900069bfd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7bd/0x11f0 kernel/workqueue.c:2264
3 locks held by kworker/1:7/21843:
2 locks held by syz-executor.1/17557:
2 locks held by syz-executor.2/21324:
#0: ffff8880416fd010 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
#0: ffff8880416fd010 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:651 [inline]
#0: ffff8880416fd010 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x98/0x230 net/socket.c:1370
#1: ffffffff8cf2bc78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#1: ffffffff8cf2bc78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3b0/0x8a0 kernel/rcu/tree_exp.h:948
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.21-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf18/0xf60 kernel/hung_task.c:377
kthread+0x268/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 17557 Comm: syz-executor.1 Not tainted 6.1.21-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:rwsem_read_trylock kernel/locking/rwsem.c:245 [inline]
RIP: 0010:__down_read_common+0x33/0x2c0 kernel/locking/rwsem.c:1260
Code: 53 50 41 89 f6 49 89 fc bf 01 00 00 00 e8 c5 b4 f4 ff 4c 89 e7 be 08 00 00 00 e8 f8 92 76 00 bd 00 01 00 00 f0 49 0f c1 2c 24 <48> 81 c5 00 01 00 00 0f 88 60 01 00 00 48 b8 07 00 00 00 00 00 00
RSP: 0018:ffffc900039dda60 EFLAGS: 00000206
RAX: 1ffff11006609901 RBX: ffff88803b994800 RCX: ffffffff816915c8
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88803a099458
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100741328c
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88803a099458
R13: dffffc0000000000 R14: 0000000000000002 R15: ffff88803a099458
FS: 00007f03e52c7700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f03e45ad988 CR3: 000000007a359000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_valid_map fs/f2fs/gc.c:957 [inline]
gc_data_segment fs/f2fs/gc.c:1511 [inline]
do_garbage_collect+0x1b6e/0x7940 fs/f2fs/gc.c:1740
f2fs_gc+0xc73/0x22f0 fs/f2fs/gc.c:1838
f2fs_balance_fs+0x506/0x6c0 fs/f2fs/segment.c:419
f2fs_write_single_data_page+0x10c9/0x1f70 fs/f2fs/data.c:2885
f2fs_write_cache_pages fs/f2fs/data.c:3101 [inline]
__f2fs_write_data_pages fs/f2fs/data.c:3251 [inline]
f2fs_write_data_pages+0x1978/0x2e60 fs/f2fs/data.c:3278
do_writepages+0x3a2/0x670 mm/page-writeback.c:2469
filemap_fdatawrite_wbc+0x121/0x180 mm/filemap.c:388
__filemap_fdatawrite_range mm/filemap.c:421 [inline]
file_write_and_wait_range+0x1ca/0x2b0 mm/filemap.c:774
f2fs_do_sync_file+0x69d/0x1c00 fs/f2fs/file.c:275
generic_write_sync include/linux/fs.h:2897 [inline]
f2fs_file_write_iter+0x723/0x2990 fs/f2fs/file.c:4729
__kernel_write_iter+0x2ff/0x710 fs/read_write.c:517
dump_emit_page fs/coredump.c:881 [inline]
dump_user_range+0x43d/0x8e0 fs/coredump.c:908
elf_core_dump+0x3cff/0x45b0 fs/binfmt_elf.c:2312
do_coredump+0x18b7/0x2700 fs/coredump.c:755
get_signal+0x1454/0x17d0 kernel/signal.c:2844
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:309
exc_page_fault+0x4e0/0x790 arch/x86/mm/fault.c:1578
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 002b:00000000200001c8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f03e45abf80 RCX: 00007f03e448c0f9
RDX: 00000000200002c0 RSI: 00000000200001c0 RDI: 0000000080004000
RBP: 00007f03e44e7b39 R08: 0000000020000340 R09: 0000000020000340
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffd60c6ae2f R14: 00007f03e52c7300 R15: 0000000000022000