INFO: task syz-executor.4:5021 blocked for more than 143 seconds.
Not tainted 6.4.0-rc6-syzkaller-00006-gfd37b884003c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D
stack:20248 pid:5021 ppid:5011 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x2d2/0x370 fs/fs-writeback.c:2644
sync_filesystem+0xa4/0x220 fs/sync.c:54
generic_shutdown_super+0x6f/0x340 fs/super.c:473
kill_block_super+0x84/0xf0 fs/super.c:1407
kill_f2fs_super+0x303/0x3d0 fs/f2fs/super.c:4702
deactivate_locked_super+0xa4/0x110 fs/super.c:331
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
task_work_run+0x24a/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3a5368d607
RSP: 002b:00007fff55a39438 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3a5368d607
RDX: 00007fff55a3950a RSI: 000000000000000a RDI: 00007fff55a39500
RBP: 00007fff55a39500 R08: 00000000ffffffff R09: 00007fff55a392d0
R10: 0000555556022873 R11: 0000000000000246 R12: 00007f3a536e6cdc
R13: 00007fff55a3a5c0 R14: 0000555556022810 R15: 00007fff55a3a600
INFO: task syz-executor.2:5023 blocked for more than 143 seconds.
Not tainted 6.4.0-rc6-syzkaller-00006-gfd37b884003c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:20344 pid:5023 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x2d2/0x370 fs/fs-writeback.c:2644
sync_filesystem+0xa4/0x220 fs/sync.c:54
generic_shutdown_super+0x6f/0x340 fs/super.c:473
kill_block_super+0x84/0xf0 fs/super.c:1407
kill_f2fs_super+0x303/0x3d0 fs/f2fs/super.c:4702
deactivate_locked_super+0xa4/0x110 fs/super.c:331
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
task_work_run+0x24a/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb5e0c8d607
RSP: 002b:00007fff3b09f9a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fb5e0c8d607
RDX: 00007fff3b09fa79 RSI: 000000000000000a RDI: 00007fff3b09fa70
RBP: 00007fff3b09fa70 R08: 00000000ffffffff R09: 00007fff3b09f840
R10: 0000555555ae6873 R11: 0000000000000246 R12: 00007fb5e0ce6cdc
R13: 00007fff3b0a0b30 R14: 0000555555ae6810 R15: 00007fff3b0a0b70
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8cf276f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8cf27ab0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8cf27520 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4742:
#0: ffff88814ab03098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176
1 lock held by syz-executor.4/5021:
#0: ffff88806ff8e0e0 (&type->s_umount_key#76){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361
1 lock held by syz-executor.2/5023:
#0: ffff8880340c80e0 (&type->s_umount_key#76){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361
3 locks held by kworker/0:7/5126:
2 locks held by kworker/u4:7/5139:
#0: ffff8880b993c1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
#1: ffff8880b99287c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:996
6 locks held by kworker/u4:0/21587:
5 locks held by kworker/u4:18/30360:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc6-syzkaller-00006-gfd37b884003c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 30360 Comm: kworker/u4:18 Not tainted 6.4.0-rc6-syzkaller-00006-gfd37b884003c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: writeback wb_workfn (flush-7:4)
RIP: 0010:debug_lockdep_rcu_enabled+0x29/0x30 kernel/rcu/update.c:320
Code: 90 f3 0f 1e fa 31 c0 83 3d 8b 31 a6 03 00 74 1d 83 3d ee 64 a6 03 00 74 14 65 48 8b 0d a0 12 54 75 31 c0 83 b9 c4 0a 00 00 00 <0f> 94 c0 c3 0f 1f 00 66 0f 1f 00 48 8b 3c 24 e8 43 fb ff ff 66 90
RSP: 0018:ffffc90014a8e8d8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88802b9f3400 RCX: ffff888029148000
RDX: 0000000000000000 RSI: 00000000000005ef RDI: ffffffff8aea8240
RBP: ffffc90014a8e9f0 R08: ffffffff83ca0424 R09: 0000000000000000
R10: ffffc90014a8ef50 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000002 R14: 00000000000005ef R15: 1ffff92002951d24
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f193234aea0 CR3: 0000000028bdd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__might_resched+0x90/0x780 kernel/sched/core.c:10115
down_read+0x23/0x2f0 kernel/locking/rwsem.c:1519
check_valid_map fs/f2fs/gc.c:985 [inline]
gc_data_segment fs/f2fs/gc.c:1537 [inline]
do_garbage_collect+0x21f5/0x81e0 fs/f2fs/gc.c:1765
f2fs_gc+0xea8/0x3090 fs/f2fs/gc.c:1865
f2fs_balance_fs+0x525/0x6f0 fs/f2fs/segment.c:436
f2fs_write_inode+0x402/0x480 fs/f2fs/inode.c:759
write_inode fs/fs-writeback.c:1456 [inline]
__writeback_single_inode+0x69b/0xfa0 fs/fs-writeback.c:1668
writeback_sb_inodes+0x8e3/0x11d0 fs/fs-writeback.c:1894
wb_writeback+0x458/0xc70 fs/fs-writeback.c:2068
wb_do_writeback fs/fs-writeback.c:2211 [inline]
wb_workfn+0x400/0xff0 fs/fs-writeback.c:2251
process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308