RDX: 0000000020000500 RSI: 00000000200000c0 RDI: 0000000020000040
RBP: 00007ffd3ad9da10 R08: 0000000000000000 R09: 00007ffd3ad9da20
R10: 0000000000000024 R11: 0000000000000246 R12: 0000000000000004
R13: 00007ffd3ad9da50 R14: 00007ffd3ad9da30 R15: 0000000000000000
INFO: task syz-executor850:8095 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.
syz-executor850 D27944  8095   8093 0x00000000
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
 btrfs_tree_lock+0x4fe/0x810 fs/btrfs/locking.c:233
 btrfs_init_new_buffer fs/btrfs/extent-tree.c:8145 [inline]
 btrfs_alloc_tree_block+0x9b1/0x15f0 fs/btrfs/extent-tree.c:8284
 alloc_tree_block_no_bg_flush+0x1b6/0x250 fs/btrfs/ctree.c:1039
 __btrfs_cow_block+0x3c7/0x10a0 fs/btrfs/ctree.c:1094
 btrfs_cow_block+0x276/0x840 fs/btrfs/ctree.c:1557
 btrfs_search_slot+0x66a/0x1ee0 fs/btrfs/ctree.c:2881
 btrfs_update_root+0xc9/0x6b0 fs/btrfs/root-tree.c:134
 commit_fs_roots+0x3b5/0x530 fs/btrfs/transaction.c:1286
 btrfs_commit_transaction+0x8ca/0x2480 fs/btrfs/transaction.c:2178
 btrfs_sync_fs+0x120/0x490 fs/btrfs/super.c:1279
 __sync_filesystem fs/sync.c:39 [inline]
 sync_filesystem+0x1b5/0x250 fs/sync.c:67
 generic_shutdown_super+0x70/0x370 fs/super.c:442
 kill_anon_super+0x36/0x60 fs/super.c:1032
 btrfs_kill_super+0x49/0x550 fs/btrfs/super.c:2221
 deactivate_locked_super+0x94/0x160 fs/super.c:329
 deactivate_super+0x174/0x1a0 fs/super.c:360
 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f4a189bee07
Code: Bad RIP value.
RSP: 002b:00007ffd3ad9c8f8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f4a189bee07
RDX: 00007ffd3ad9c9b9 RSI: 000000000000000a RDI: 00007ffd3ad9c9b0
RBP: 00007ffd3ad9c9b0 R08: 00000000ffffffff R09: 00007ffd3ad9c790
R10: 00005555570c1683 R11: 0000000000000202 R12: 00007ffd3ad9da30
R13: 00005555570c15f0 R14: 00007ffd3ad9c920 R15: 0000000000000001

Showing all locks held in the system:
1 lock held by khungtaskd/1572:
 #0: 00000000e5bded73 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7779:
 #0: 0000000060280a2d (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
3 locks held by syz-executor850/8095:
 #0: 0000000094d51bf5 (&type->s_umount_key#47){+.+.}, at: deactivate_super+0x16c/0x1a0 fs/super.c:359
 #1: 00000000400a96fd (&fs_info->reloc_mutex){+.+.}, at: btrfs_commit_transaction+0x80b/0x2480 fs/btrfs/transaction.c:2120
 #2: 00000000729c1ffc (&fs_info->tree_log_mutex){+.+.}, at: btrfs_commit_transaction+0x8c2/0x2480 fs/btrfs/transaction.c:2176
1 lock held by btrfs-transacti/8125:
 #0: 00000000f0fd5e02 (&fs_info->transaction_kthread_mutex){+.+.}, at: transaction_kthread+0xfa/0x490 fs/btrfs/disk-io.c:1765

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1572 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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: 4694 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:101
Code: 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 <83> fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48
RSP: 0018:ffff8880a0fbfa28 EFLAGS: 00000246
RAX: ffff8880a0fb6600 RBX: dffffc0000000000 RCX: ffffffff816c5cc8
RDX: 0000000000000000 RSI: ffffffff816c36e5 RDI: ffffc90001b2e072
RBP: ffff8880a0fbfb00 R08: 0000000000000000 R09: 0000000000000027
R10: 0000000000000006 R11: 0000000000000000 R12: ffffffff886fb460
R13: ffffed10141f7f62 R14: ffffc90001b2e1e0 R15: 0000000040000000
FS:  00007fe35bb858c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe358ec7000 CR3: 00000000a08cd000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ___bpf_prog_run+0x45/0x4e80 kernel/bpf/core.c:1065