BTRFS info (device loop2): using free space tree
BTRFS info (device loop2): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor.0 (13978)
INFO: task kworker/u4:0:4505 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:0 D26048 4505 2 0x80000000
Workqueue: writeback wb_workfn (flush-7:5)
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
__mutex_lock_common kernel/locking/mutex.c:1016 [inline]
__mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
f2fs_balance_fs+0x709/0xd80 fs/f2fs/segment.c:512
f2fs_write_inode+0x500/0x600 fs/f2fs/inode.c:630
write_inode fs/fs-writeback.c:1244 [inline]
__writeback_single_inode+0x733/0x11d0 fs/fs-writeback.c:1442
writeback_sb_inodes+0x537/0xef0 fs/fs-writeback.c:1647
F2FS-fs (loop3): invalid crc value
F2FS-fs (loop3): Found nat_bits in checkpoint
__writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1716
wb_writeback+0x841/0xcc0 fs/fs-writeback.c:1822
F2FS-fs (loop3): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix.
wb_check_old_data_flush fs/fs-writeback.c:1924 [inline]
wb_do_writeback fs/fs-writeback.c:1977 [inline]
wb_workfn+0x8ba/0x1250 fs/fs-writeback.c:2006
process_one_work+0x864/0x1570 kernel/workqueue.c:2153
F2FS-fs (loop3): Mounted with checkpoint version = 48b305e4
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Showing all locks held in the system:
3 locks held by kworker/u4:2/33:
1 lock held by khungtaskd/1571:
#0: 00000000a5d520e7 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7803:
#0: 000000002e52220d (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
4 locks held by kworker/u4:0/4505:
#0: 0000000065cefaf8 ((wq_completion)"writeback"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
#1: 000000006cfaa175 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
#2: 000000006da858e6 (&type->s_umount_key#59){++++}, at: trylock_super+0x1d/0x100 fs/super.c:412
#3: 000000004e083a2f (&sbi->gc_mutex){+.+.}, at: f2fs_balance_fs+0x709/0xd80 fs/f2fs/segment.c:512
3 locks held by syz-executor.5/5516:
1 lock held by syz-executor.3/14070:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x991/0xe60 kernel/hung_task.c:287
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 33 Comm: kworker/u4:2 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: netns cleanup_net
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline]
RIP: 0010:write_comp_data+0xf/0x70 kernel/kcov.c:122
Code: 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 c0 df 01 00 <65> 8b 05 7a 59 9f 7e a9 00 01 1f 00 75 4f 8b 86 60 13 00 00 83 f8
RSP: 0018:ffff8880b50efae0 EFLAGS: 00000246
RAX: ffff8880b50da1c0 RBX: 0000000000000001 RCX: ffffffff83771e23
RDX: 0000000000000001 RSI: ffff8880b50da1c0 RDI: 0000000000000005
RBP: ffffffff88b3e120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff88b3e0e0 R14: 000000000000000a R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f73c000 CR3: 000000009ccc0000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_preemption_disabled+0x33/0x280 lib/smp_processor_id.c:15
rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline]
rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025
rcu_read_unlock include/linux/rcupdate.h:677 [inline]
inet_twsk_purge+0x6f6/0x7c0 net/ipv4/inet_timewait_sock.c:298
ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156
cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554
process_one_work+0x864/0x1570 kernel/workqueue.c:2153
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415