INFO: task syz-executor.4:6139 blocked for more than 143 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:22424 pid:6139  ppid:3573   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:1371 [inline]
 handle_page_fault arch/x86/mm/fault.c:1462 [inline]
 exc_page_fault+0x26f/0x660 arch/x86/mm/fault.c:1518
 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