INFO: task kworker/u4:3:52 blocked for more than 143 seconds.
Not tainted 6.2.0-syzkaller-13277-g2eb29d59ddf0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:3 state:D stack:22928 pid:52 ppid:2 flags:0x00004000
Workqueue: loop2 loop_workfn
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0xcce/0x5b20 kernel/sched/core.c:6622
schedule+0xde/0x1a0 kernel/sched/core.c:6698
io_schedule+0xbe/0x130 kernel/sched/core.c:8884
folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1301
__folio_lock mm/filemap.c:1664 [inline]
folio_lock include/linux/pagemap.h:952 [inline]
folio_lock include/linux/pagemap.h:948 [inline]
__filemap_get_folio+0xbab/0xdc0 mm/filemap.c:1936
shmem_get_folio_gfp+0x422/0x1950 mm/shmem.c:1877
shmem_get_folio mm/shmem.c:2068 [inline]
shmem_file_read_iter+0x593/0xa40 mm/shmem.c:2633
call_read_iter include/linux/fs.h:1845 [inline]
do_iter_readv_writev+0x2e0/0x3b0 fs/read_write.c:733
do_iter_read+0x2f2/0x750 fs/read_write.c:796
vfs_iter_read+0x74/0xa0 fs/read_write.c:838
lo_read_simple drivers/block/loop.c:290 [inline]
do_req_filebacked drivers/block/loop.c:500 [inline]
loop_handle_cmd drivers/block/loop.c:1879 [inline]
loop_process_work+0x1591/0x2110 drivers/block/loop.c:1914
process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task syz-executor.3:5126 blocked for more than 143 seconds.
Not tainted 6.2.0-syzkaller-13277-g2eb29d59ddf0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:24032 pid:5126 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0xcce/0x5b20 kernel/sched/core.c:6622
schedule+0xde/0x1a0 kernel/sched/core.c:6698
io_schedule+0xbe/0x130 kernel/sched/core.c:8884
folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1301
folio_wait_writeback+0x47/0x3b0 mm/page-writeback.c:3127
__filemap_fdatawait_range+0x10f/0x210 mm/filemap.c:525
filemap_write_and_wait_range mm/filemap.c:687 [inline]
filemap_write_and_wait_range+0xe6/0x120 mm/filemap.c:669
filemap_write_and_wait include/linux/pagemap.h:60 [inline]
sync_blockdev block/bdev.c:198 [inline]
sync_blockdev+0x6b/0x90 block/bdev.c:194
exfat_sync_fs+0x9b/0x160 fs/exfat/super.c:66
sync_filesystem.part.0+0x13c/0x1d0 fs/sync.c:66
sync_filesystem+0x8f/0xc0 fs/sync.c:43
generic_shutdown_super+0x74/0x480 fs/super.c:473
kill_block_super+0x9b/0xf0 fs/super.c:1398
deactivate_locked_super+0x98/0x160 fs/super.c:331
deactivate_super+0xb1/0xd0 fs/super.c:362
cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6d6e68d567
RSP: 002b:00007fff46524648 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6d6e68d567
RDX: 00007fff4652471b RSI: 000000000000000a RDI: 00007fff46524710
RBP: 00007fff46524710 R08: 00000000ffffffff R09: 00007fff465244e0
R10: 0000555556107873 R11: 0000000000000246 R12: 00007f6d6e6e6b24
R13: 00007fff465257d0 R14: 0000555556107810 R15: 00007fff46525810
INFO: task kworker/u4:8:7241 blocked for more than 143 seconds.
Not tainted 6.2.0-syzkaller-13277-g2eb29d59ddf0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:8 state:D stack:26936 pid:7241 ppid:2 flags:0x00004000
Workqueue: loop3 loop_workfn
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0xcce/0x5b20 kernel/sched/core.c:6622
schedule+0xde/0x1a0 kernel/sched/core.c:6698
io_schedule+0xbe/0x130 kernel/sched/core.c:8884
folio_wait_bit_common+0x394/0x9b0 mm/filemap.c:1301
__folio_lock mm/filemap.c:1664 [inline]
folio_lock include/linux/pagemap.h:952 [inline]
folio_lock include/linux/pagemap.h:948 [inline]
__filemap_get_folio+0xbab/0xdc0 mm/filemap.c:1936
shmem_get_folio_gfp+0x422/0x1950 mm/shmem.c:1877
shmem_get_folio mm/shmem.c:2068 [inline]
shmem_write_begin+0x14a/0x380 mm/shmem.c:2561
generic_perform_write+0x256/0x570 mm/filemap.c:3926
__generic_file_write_iter+0x2ae/0x500 mm/filemap.c:4054
generic_file_write_iter+0xe3/0x350 mm/filemap.c:4086
call_write_iter include/linux/fs.h:1851 [inline]
do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735
do_iter_write+0x182/0x700 fs/read_write.c:861
vfs_iter_write+0x74/0xa0 fs/read_write.c:902
lo_write_bvec drivers/block/loop.c:249 [inline]
lo_write_simple drivers/block/loop.c:271 [inline]
do_req_filebacked drivers/block/loop.c:495 [inline]
loop_handle_cmd drivers/block/loop.c:1879 [inline]
loop_process_work+0xdac/0x2110 drivers/block/loop.c:1914
process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task syz-executor.4:12236 blocked for more than 144 seconds.
Not tainted 6.2.0-syzkaller-13277-g2eb29d59ddf0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26880 pid:12236 ppid:5129 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0xcce/0x5b20 kernel/sched/core.c:6622
schedule+0xde/0x1a0 kernel/sched/core.c:6698
io_schedule+0xbe/0x130 kernel/sched/core.c:8884
bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209
__wait_on_bit_lock+0x11f/0x1a0 kernel/sched/wait_bit.c:90
out_of_line_wait_on_bit_lock+0xd9/0x110 kernel/sched/wait_bit.c:117
wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
__lock_buffer+0x66/0x70 fs/buffer.c:70
lock_buffer include/linux/buffer_head.h:400 [inline]
buffer_migrate_lock_buffers mm/migrate.c:705 [inline]
__buffer_migrate_folio+0x6bb/0x830 mm/migrate.c:751
move_to_new_folio+0x17a/0x6e0 mm/migrate.c:978
migrate_folio_move mm/migrate.c:1289 [inline]
migrate_pages_batch+0xffc/0x3660 mm/migrate.c:1821
migrate_pages+0x1b73/0x2300 mm/migrate.c:1973
compact_zone+0x1d3c/0x3ea0 mm/compaction.c:2420
compact_node+0x12a/0x1c0 mm/compaction.c:2717
compact_nodes mm/compaction.c:2730 [inline]
sysctl_compaction_handler+0x117/0x160 mm/compaction.c:2774
proc_sys_call_handler+0x49c/0x6d0 fs/proc/proc_sysctl.c:604
call_write_iter include/linux/fs.h:1851 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x9ed/0xe10 fs/read_write.c:584
ksys_write+0x12b/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f954488c0f9
RSP: 002b:00007f9545559168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f95449abf80 RCX: 00007f954488c0f9
RDX: 000000000000fdef RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007f95448e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc9aab0d4f R14: 00007f9545559300 R15: 0000000000022000
INFO: task syz-executor.2:12237 blocked for more than 144 seconds.
Not tainted 6.2.0-syzkaller-13277-g2eb29d59ddf0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27704 pid:12237 ppid:5120 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0xcce/0x5b20 kernel/sched/core.c:6622
schedule+0xde/0x1a0 kernel/sched/core.c:6698
io_schedule+0xbe/0x130 kernel/sched/core.c:8884
bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209
__wait_on_bit+0x64/0x180 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
__wait_on_buffer fs/buffer.c:123 [inline]
wait_on_buffer include/linux/buffer_head.h:388 [inline]
__bread_slow fs/buffer.c:1221 [inline]
__bread_gfp+0x29e/0x330 fs/buffer.c:1413
sb_bread include/linux/buffer_head.h:341 [inline]
exfat_load_upcase_table fs/exfat/nls.c:672 [inline]
exfat_create_upcase_table+0x5c5/0xd80 fs/exfat/nls.c:784
__exfat_fill_super fs/exfat/super.c:597 [inline]
exfat_fill_super+0x17c1/0x30f0 fs/exfat/super.c:649
get_tree_bdev+0x444/0x760 fs/super.c:1294
vfs_get_tree+0x8d/0x350 fs/super.c:1501
do_new_mount fs/namespace.c:3042 [inline]
path_mount+0x1342/0x1e40 fs/namespace.c:3372
do_mount fs/namespace.c:3385 [inline]
__do_sys_mount fs/namespace.c:3594 [inline]
__se_sys_mount fs/namespace.c:3571 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3571
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fabfa88d62a
RSP: 002b:00007fabf93fdf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000000014e6 RCX: 00007fabfa88d62a
RDX: 0000000020000640 RSI: 0000000020001540 RDI: 00007fabf93fdfe0
RBP: 00007fabf93fe020 R08: 00007fabf93fe020 R09: 0000000020000000
R10: 0000000020000000 R11: 0000000000000202 R12: 0000000020000640
R13: 0000000020001540 R14: 00007fabf93fdfe0 R15: 0000000020000040
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c794e70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c794b70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/27:
#0: ffffffff8c7959c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495
2 locks held by kworker/u4:3/52:
#0: ffff8880822a1138 ((wq_completion)loop2){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880822a1138 ((wq_completion)loop2){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8880822a1138 ((wq_completion)loop2){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff8880822a1138 ((wq_completion)loop2){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff8880822a1138 ((wq_completion)loop2){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff8880822a1138 ((wq_completion)loop2){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
#1: ffffc90000bd7da8 ((work_completion)(&worker->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
3 locks held by kworker/u4:7/2897:
#0: ffff8880b983c298 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:539
#1: ffffc9000b557da8 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
#2: ffff8880b9829698 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5a/0x1f0 kernel/time/timer.c:999
2 locks held by getty/4755:
#0: ffff888027c19098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
2 locks held by syz-executor.3/5126:
#0: ffff88807a9180e0 (&type->s_umount_key#51){+.+.}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361
#1: ffff888082e820e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_sync_fs+0x6d/0x160 fs/exfat/super.c:65
4 locks held by kworker/u4:8/7241:
#0: ffff88803fa42938 ((wq_completion)loop3){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88803fa42938 ((wq_completion)loop3){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88803fa42938 ((wq_completion)loop3){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88803fa42938 ((wq_completion)loop3){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff88803fa42938 ((wq_completion)loop3){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff88803fa42938 ((wq_completion)loop3){+.+.}-{0:0}, at: process_one_work+0x86d/0x1820 kernel/workqueue.c:2361
#1: ffffc90014c57da8 ((work_completion)(&worker->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1820 kernel/workqueue.c:2365
#2: ffff888016636460 (sb_writers#5){.+.+}-{0:0}, at: process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
#3: ffff888083b3c7a0 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#3: ffff888083b3c7a0 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: generic_file_write_iter+0x92/0x350 mm/filemap.c:4083
2 locks held by syz-executor.4/12236:
#0: ffff8880221fb9e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x100 fs/file.c:1046
#1: ffff88802bd28460 (sb_writers#3){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
1 lock held by syz-executor.2/12237:
#0: ffff8880278ce0e0 (&type->s_umount_key#50/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.2.0-syzkaller-13277-g2eb29d59ddf0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x316/0x3e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x33f/0x460 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+0xe94/0x11e0 kernel/hung_task.c:379
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x40/0x50 drivers/acpi/processor_idle.c:112