INFO: task kworker/u4:12:25481 blocked for more than 143 seconds.
Not tainted 6.2.0-rc6-syzkaller-00258-gdb27c22251e7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:12 state:D stack:20064 pid:25481 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-btrfs-323)
Call Trace:
__schedule+0x13ca/0x43c0
schedule+0xc3/0x190
io_schedule+0x8c/0x100
folio_wait_bit_common+0x7fe/0x1210
extent_writepages+0x8c4/0x1790
do_writepages+0x3a6/0x660
__writeback_single_inode+0x1a9/0x1550
writeback_sb_inodes+0x965/0x13b0
__writeback_inodes_wb+0x11b/0x260
wb_writeback+0x4ef/0x1040
wb_workfn+0xd72/0x1110
process_one_work+0x96c/0x13e0
worker_thread+0xa63/0x1210
kthread+0x270/0x300
ret_from_fork+0x1f/0x30
INFO: task syz-executor.2:4628 blocked for more than 143 seconds.
Not tainted 6.2.0-rc6-syzkaller-00258-gdb27c22251e7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25528 pid:4628 ppid:5099 flags:0x00004004
Call Trace:
__schedule+0x13ca/0x43c0
schedule+0xc3/0x190
io_schedule+0x8c/0x100
folio_wait_bit_common+0x7fe/0x1210
extent_writepages+0x8c4/0x1790
do_writepages+0x3a6/0x660
filemap_fdatawrite_wbc+0x125/0x180
filemap_flush+0x14c/0x1d0
btrfs_release_file+0x117/0x130
__fput+0x3b7/0x890
task_work_run+0x24a/0x300
exit_to_user_mode_loop+0xd1/0xf0
exit_to_user_mode_prepare+0xb1/0x140
syscall_exit_to_user_mode+0x54/0x2d0
do_syscall_64+0x4d/0xc0
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc8e303df7b
RSP: 002b:00007ffc0ca623f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007fc8e303df7b
RDX: 0000001b31f20000 RSI: 0000001b31f23dd8 RDI: 0000000000000004
RBP: 00007fc8e31ad980 R08: 0000000000000000 R09: 00000000f2530024
R10: 00007ffc0cad9080 R11: 0000000000000293 R12: 0000000000152099
R13: 00007ffc0ca624f0 R14: 00007ffc0ca62510 R15: 0000000000000032
INFO: task syz-executor.2:4629 blocked for more than 144 seconds.
Not tainted 6.2.0-rc6-syzkaller-00258-gdb27c22251e7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:23656 pid:4629 ppid:5099 flags:0x00004004
Call Trace:
__schedule+0x13ca/0x43c0
schedule+0xc3/0x190
wait_extent_bit+0x50c/0x6a0
lock_extent+0x1bb/0x270
find_lock_delalloc_range+0x4c9/0x9a0
writepage_delalloc+0x1f1/0x590
__extent_writepage+0x952/0x1840
extent_writepages+0xbc6/0x1790
do_writepages+0x3a6/0x660
filemap_fdatawrite_wbc+0x125/0x180
filemap_fdatawrite_range+0x17b/0x200
start_ordered_ops+0xdb/0x210
btrfs_sync_file+0x450/0x1220
btrfs_do_write_iter+0xccc/0x1270
vfs_write+0x7dd/0xc50
ksys_write+0x17c/0x2a0
do_syscall_64+0x41/0xc0
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc8e308c0c9
RSP: 002b:00007fc8e1bfe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc8e31abf80 RCX: 00007fc8e308c0c9
RDX: 0000000000000128 RSI: 0000000020004400 RDI: 0000000000000006
RBP: 00007fc8e30e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0ca6238f R14: 00007fc8e1bfe300 R15: 0000000000022000
INFO: task syz-executor.2:4699 blocked for more than 144 seconds.
Not tainted 6.2.0-rc6-syzkaller-00258-gdb27c22251e7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25016 pid:4699 ppid:5099 flags:0x00004004
Call Trace:
__schedule+0x13ca/0x43c0
schedule+0xc3/0x190
io_schedule+0x8c/0x100
folio_wait_bit_common+0x7fe/0x1210
btrfs_page_mkwrite+0x41e/0xc90
do_page_mkwrite+0x1a1/0x600
do_wp_page+0x506/0x3270
handle_mm_fault+0x2388/0x51c0
exc_page_fault+0x66a/0x880
asm_exc_page_fault+0x26/0x30
RIP: 0010:copy_user_short_string+0xd/0x40
Code: 74 0a 89 d1 f3 a4 89 c8 0f 01 ca c3 89 d0 0f 01 ca c3 01 ca eb e7 0f 1f 80 00 00 00 00 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 <4c> 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a
RSP: 0018:ffffc90003a8f3b0 EFLAGS: 00050202
RAX: ffffffff8435f301 RBX: 00007fffffffefc8 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffffc90003a8f460 RDI: 0000000020000120
RBP: ffffc90003a8f510 R08: 0000000000000000 R09: fffff52000751e93
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000038
R13: ffffc90003a8f460 R14: 0000000020000120 R15: ffffc90003a8f460
_copy_to_user+0xed/0x130
fiemap_fill_next_extent+0x235/0x410
fiemap_process_hole+0x5d6/0xb40
extent_fiemap+0xe42/0x2100
btrfs_fiemap+0x178/0x1e0
do_vfs_ioctl+0x194f/0x2a40
__se_sys_ioctl+0x81/0x160
do_syscall_64+0x41/0xc0
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc8e308c0c9
RSP: 002b:00007fc8da7dd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc8e31ac050 RCX: 00007fc8e308c0c9
RDX: 0000000020000100 RSI: 00000000c020660b RDI: 0000000000000005
RBP: 00007fc8e30e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0ca6238f R14: 00007fc8da7dd300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cf26e10 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cf27610 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0
1 lock held by khungtaskd/28:
#0: ffffffff8cf26c40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4760:
#0: ffff88814b718098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1630
3 locks held by kworker/u4:10/12842:
3 locks held by kworker/u4:12/25481:
#0: ffff8881451cc938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0
#1: ffffc90004797d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0
#2: ffff88802afe40e0 (&type->s_umount_key#52){++++}-{3:3}, at: trylock_super+0x1f/0xf0
2 locks held by syz-executor.2/4629:
#0: ffff88801d9f19e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x254/0x2f0
#1: ffff88802afe4460 (sb_writers#16){.+.+}-{0:0}, at: vfs_write+0x27f/0xc50
3 locks held by syz-executor.2/4699:
#0: ffff88802a438a18 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18d/0x880
#1: ffff88802afe4558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600
#2: ffff888072ef2ae8 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x416/0xc90
2 locks held by syz-executor.5/4944:
#0: ffff88802afe40e0 (&type->s_umount_key#52){++++}-{3:3}, at: iterate_supers+0xb0/0x1e0
#1: ffff88801f2027d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x26c/0xa60
2 locks held by syz-executor.5/5270:
#0: ffff88802afe40e0 (&type->s_umount_key#52){++++}-{3:3}, at: iterate_supers+0xb0/0x1e0
#1: ffff88801f2027d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x26c/0xa60
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc6-syzkaller-00258-gdb27c22251e7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
dump_stack_lvl+0x1b5/0x2a0
nmi_cpu_backtrace+0x47b/0x500
nmi_trigger_cpumask_backtrace+0x1d3/0x430
watchdog+0xf70/0xfb0
kthread+0x270/0x300
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5158 Comm: kworker/0:3 Not tainted 6.2.0-rc6-syzkaller-00258-gdb27c22251e7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: events_power_efficient gc_worker
RIP: 0010:lock_acquire+0x202/0x600
Code: 9d 98 7e 45 31 c9 f7 c3 00 02 00 00 41 0f 94 c1 48 8b 7c 24 28 44 89 f6 8b 54 24 24 8b 4c 24 20 45 89 f8 6a 00 6a 00 ff 75 10 74 24 50 e8 35 05 00 00 48 83 c4 20 48 c7 c7 a0 98 ea 8a e8 f5
RSP: 0018:ffffc900042af968 EFLAGS: 00000006
RAX: 0000000000000000 RBX: 0000000000000246 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8cf26c40
RBP: ffffc900042afae0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000855f38
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561e60f193c8 CR3: 000000000cc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_acquire+0x2e/0x40
gc_worker+0x28c/0x1440
process_one_work+0x96c/0x13e0
worker_thread+0xa63/0x1210
kthread+0x270/0x300
ret_from_fork+0x1f/0x30