INFO: task syz-executor.4:24723 blocked for more than 143 seconds.
      Not tainted 6.3.0-syzkaller-00436-g173ea743bf7a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:25000 pid:24723 ppid:5018   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5307 [inline]
 __schedule+0x173b/0x4630 kernel/sched/core.c:6625
 schedule+0xc3/0x180 kernel/sched/core.c:6701
 io_schedule+0x8c/0x100 kernel/sched/core.c:8887
 folio_wait_bit_common+0x86c/0x12b0 mm/filemap.c:1301
 btrfs_page_mkwrite+0x42d/0xc90 fs/btrfs/inode.c:8153
 do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
 wp_page_shared mm/memory.c:3274 [inline]
 do_wp_page+0x501/0x3640 mm/memory.c:3356
 handle_pte_fault mm/memory.c:4941 [inline]
 __handle_mm_fault mm/memory.c:5065 [inline]
 handle_mm_fault+0x23a0/0x51c0 mm/memory.c:5211
 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline]
 handle_page_fault arch/x86/mm/fault.c:1498 [inline]
 exc_page_fault+0x5b1/0x7c0 arch/x86/mm/fault.c:1554
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f19b542bde9
RSP: 002b:00007fff70b05670 EFLAGS: 00010246
RAX: 0000000020000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000555555e7c2e8
RBP: 00007fff70b05768 R08: 0000000000000000 R09: 0000000000000000
R10: 00007f19b5005b48 R11: 0000000000066622 R12: 0000000000227472
R13: 00007fff70b05790 R14: 00007fff70b057b0 R15: 0000000000000032
 </TASK>
INFO: task syz-executor.4:24725 blocked for more than 144 seconds.
      Not tainted 6.3.0-syzkaller-00436-g173ea743bf7a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:23560 pid:24725 ppid:5018   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5307 [inline]
 __schedule+0x173b/0x4630 kernel/sched/core.c:6625
 schedule+0xc3/0x180 kernel/sched/core.c:6701
 wait_on_state fs/btrfs/extent-io-tree.c:707 [inline]
 wait_extent_bit+0x50c/0x670 fs/btrfs/extent-io-tree.c:751
 lock_extent+0x1ce/0x280 fs/btrfs/extent-io-tree.c:1742
 btrfs_page_mkwrite+0x554/0xc90 fs/btrfs/inode.c:8163
 do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
 wp_page_shared mm/memory.c:3274 [inline]
 do_wp_page+0x501/0x3640 mm/memory.c:3356
 handle_pte_fault mm/memory.c:4941 [inline]
 __handle_mm_fault mm/memory.c:5065 [inline]
 handle_mm_fault+0x23a0/0x51c0 mm/memory.c:5211
 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline]
 handle_page_fault arch/x86/mm/fault.c:1498 [inline]
 exc_page_fault+0x5b1/0x7c0 arch/x86/mm/fault.c:1554
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:rep_movs_alternative+0x33/0xb0 arch/x86/lib/copy_user_64.S:56
Code: 46 83 f9 08 73 21 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 <48> 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb
RSP: 0018:ffffc90015dff550 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 00007fffffffefc8 RCX: 0000000000000038
RDX: 0000000000000000 RSI: ffffc90015dff600 RDI: 00000000200005e0
RBP: ffffc90015dff6b0 R08: dffffc0000000000 R09: fffff52002bbfec7
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000038
R13: ffffc90015dff600 R14: ffffc90015dff600 R15: 00000000200005e0
 copy_user_generic arch/x86/include/asm/uaccess_64.h:31 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:52 [inline]
 _copy_to_user+0xf0/0x130 lib/usercopy.c:41
 copy_to_user include/linux/uaccess.h:169 [inline]
 fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:144
 emit_last_fiemap_cache fs/btrfs/extent_io.c:3036 [inline]
 extent_fiemap+0x1bf9/0x2150 fs/btrfs/extent_io.c:3563
 btrfs_fiemap+0x178/0x1e0 fs/btrfs/inode.c:7835
 ioctl_fiemap fs/ioctl.c:219 [inline]
 do_vfs_ioctl+0x19ba/0x2b10 fs/ioctl.c:810
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl+0x81/0x160 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f19b548c169
RSP: 002b:00007f19b6138168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f19b55abf80 RCX: 00007f19b548c169
RDX: 00000000200005c0 RSI: 00000000c020660b RDI: 0000000000000004
RBP: 00007f19b54e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff70b0562f R14: 00007f19b6138300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
 #0: ffffffff8cf256b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
 #0: 
ffffffff8cf25a70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
 #0: ffffffff8cf254e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:3/46:
1 lock held by udevd/4429:
2 locks held by getty/4726:
 #0: ffff88802ce94098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
2 locks held by kworker/1:5/5066:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
 #1: ffffc900050a7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
7 locks held by kworker/u4:8/5300:
3 locks held by kworker/1:11/5485:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
 #1: ffffc90005e67d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
 #2: ffffffff8cf2abb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
 #2: ffffffff8cf2abb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:992
6 locks held by kworker/u4:9/6168:
3 locks held by kworker/0:24/7944:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
 #1: ffffc90016b7fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
 #2: ffffffff8cf2abb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
 #2: ffffffff8cf2abb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:992
9 locks held by kworker/u4:4/4587:
2 locks held by kworker/0:16/24362:
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
 #1: ffffc90006867d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
3 locks held by syz-executor.4/24723:
 #0: ffff88802637ed98 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 #0: ffff88802637ed98 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1348 [inline]
 #0: ffff88802637ed98 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1498 [inline]
 #0: ffff88802637ed98 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18e/0x7c0 arch/x86/mm/fault.c:1554
 #1: ffff88807e6e2558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
 #2: ffff88803502f440 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x425/0xc90 fs/btrfs/inode.c:8152
4 locks held by syz-executor.4/24725:
 #0: ffff88803502f5b8 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
 #0: ffff88803502f5b8 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: btrfs_inode_lock+0x60/0xd0 fs/btrfs/inode.c:169
 #1: ffff88802637ed98 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 #1: ffff88802637ed98 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1348 [inline]
 #1: ffff88802637ed98 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1498 [inline]
 #1: ffff88802637ed98 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18e/0x7c0 arch/x86/mm/fault.c:1554
 #2: ffff88807e6e2558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
 #3: ffff88803502f440 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x425/0xc90 fs/btrfs/inode.c:8152
1 lock held by syz-executor.3/26885:
2 locks held by syz-executor.3/26886:
 #0: ffff88814b4a4460 (sb_writers#4){.+.+}-{0:0}, at: do_sendfile+0x5fb/0xff0 fs/read_write.c:1253
 #1: ffff888023fc0e08 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #1: ffff888023fc0e08 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: ext4_dio_write_iter fs/ext4/file.c:534 [inline]
 #1: ffff888023fc0e08 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: ext4_file_write_iter+0x5d5/0x1930 fs/ext4/file.c:708

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-syzkaller-00436-g173ea743bf7a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xec2/0xf00 kernel/hung_task.c:379
 kthread+0x2b2/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5003 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-00436-g173ea743bf7a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:memset_orig+0x3a/0xac arch/x86/lib/memset_64.S:69
Code: 01 01 01 01 01 48 0f af c1 41 89 f9 41 83 e1 07 75 6c 48 89 d1 48 c1 e9 06 74 35 0f 1f 44 00 00 48 ff c9 48 89 07 48 89 47 08 <48> 89 47 10 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89
RSP: 0018:ffffc900048febd8 EFLAGS: 00000247
RAX: 0000000000000000 RBX: ffff88807b1a3a80 RCX: 0000000000000000
RDX: 0000000000000060 RSI: 0000000000000000 RDI: ffffc900048fec40
RBP: dffffc0000000000 R08: dffffc0000000000 R09: 0000000000000000
R10: ffffc900048fec40 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffffff81788a40 R14: ffffc900048fec40 R15: 0000000000000000
FS:  0000555555ae8400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb5fd9f6000 CR3: 0000000042d70000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __unwind_start+0x36/0x720 arch/x86/kernel/unwind_orc.c:663
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xdf/0x140 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769
 slab_alloc_node mm/slub.c:3452 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x11f/0x2e0 mm/slub.c:3476
 alloc_extent_state+0x25/0x2e0 fs/btrfs/extent-io-tree.c:146
 __set_extent_bit+0x1a0/0x1ab0 fs/btrfs/extent-io-tree.c:998
 set_extent_bit+0x42/0x60 fs/btrfs/extent-io-tree.c:1193
 set_extent_dirty fs/btrfs/extent-io-tree.h:181 [inline]
 btrfs_update_block_group+0x6b6/0xb40 fs/btrfs/block-group.c:3528
 do_free_extent_accounting fs/btrfs/extent-tree.c:2857 [inline]
 __btrfs_free_extent+0x1398/0x2ef0 fs/btrfs/extent-tree.c:3189
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1954 [inline]
 __btrfs_run_delayed_refs+0x10c6/0x4100 fs/btrfs/extent-tree.c:2017
 btrfs_run_delayed_refs+0x2f9/0x480 fs/btrfs/extent-tree.c:2148
 commit_cowonly_roots+0x670/0x860 fs/btrfs/transaction.c:1318
 btrfs_commit_transaction+0x13d5/0x3440 fs/btrfs/transaction.c:2411
 sync_filesystem+0x1c0/0x220 fs/sync.c:66
 generic_shutdown_super+0x6f/0x340 fs/super.c:473
 kill_anon_super+0x3b/0x60 fs/super.c:1107
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2133
 deactivate_locked_super+0xa4/0x110 fs/super.c:331
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc8d708d5d7
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffccf6c2518 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc8d708d5d7
RDX: 00007ffccf6c25ea RSI: 000000000000000a RDI: 00007ffccf6c25e0
RBP: 00007ffccf6c25e0 R08: 00000000ffffffff R09: 00007ffccf6c23b0
R10: 0000555555ae9873 R11: 0000000000000246 R12: 00007fc8d70e6cdc
R13: 00007ffccf6c36a0 R14: 0000555555ae9810 R15: 00007ffccf6c36e0
 </TASK>