INFO: task syz-executor.0:5801 blocked for more than 143 seconds.
      Not tainted 6.1.94-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:23936 pid:5801  ppid:3575   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 wait_on_state fs/btrfs/extent-io-tree.c:709 [inline]
 wait_extent_bit+0x423/0x570 fs/btrfs/extent-io-tree.c:742
 lock_extent+0x17a/0x200 fs/btrfs/extent-io-tree.c:1657
 btrfs_page_mkwrite+0x550/0xc90 fs/btrfs/inode.c:8602
 do_page_mkwrite+0x1a1/0x5f0 mm/memory.c:2992
 wp_page_shared+0x164/0x380 mm/memory.c:3341
 handle_pte_fault mm/memory.c:5031 [inline]
 __handle_mm_fault mm/memory.c:5155 [inline]
 handle_mm_fault+0x2525/0x5340 mm/memory.c:5276
 do_user_addr_fault arch/x86/mm/fault.c:1340 [inline]
 handle_page_fault arch/x86/mm/fault.c:1431 [inline]
 exc_page_fault+0x26f/0x620 arch/x86/mm/fault.c:1487
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_short_string+0xd/0x40 arch/x86/lib/copy_user_64.S:233
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:ffffc900060b74d0 EFLAGS: 00050202
RAX: ffffffff84386601 RBX: 00007fffffffefc8 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffffc900060b7580 RDI: 00000000200002a0
RBP: ffffc900060b7638 R08: 0000000000000000 R09: fffff52000c16eb7
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000038
R13: ffffc900060b7580 R14: 00000000200002a0 R15: ffffc900060b7580
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
 _copy_to_user+0xe9/0x130 lib/usercopy.c:41
 copy_to_user include/linux/uaccess.h:169 [inline]
 fiemap_fill_next_extent+0x231/0x410 fs/ioctl.c:144
 emit_fiemap_extent+0x259/0x400 fs/btrfs/extent_io.c:3561
 extent_fiemap+0xf49/0x1ff0 fs/btrfs/extent_io.c:4056
 btrfs_fiemap+0x174/0x1e0 fs/btrfs/inode.c:8274
 ioctl_fiemap fs/ioctl.c:219 [inline]
 do_vfs_ioctl+0x18e9/0x2a90 fs/ioctl.c:810