INFO: task syz-executor.1:2731 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:23280 pid:2731  tgid:2731  ppid:5085   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 io_schedule+0x8c/0x100 kernel/sched/core.c:8998
 folio_wait_bit_common+0x881/0x12b0 mm/filemap.c:1273
 btrfs_page_mkwrite+0x4a4/0xd10 fs/btrfs/inode.c:8148
 do_page_mkwrite+0x197/0x470 mm/memory.c:2944
 wp_page_shared mm/memory.c:3339 [inline]
 do_wp_page+0x1d07/0x4d40 mm/memory.c:3479
 handle_pte_fault mm/memory.c:5055 [inline]
 __handle_mm_fault mm/memory.c:5180 [inline]
 handle_mm_fault+0x1b1c/0x6680 mm/memory.c:5345
 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline]
 handle_page_fault arch/x86/mm/fault.c:1507 [inline]
 exc_page_fault+0x456/0x870 arch/x86/mm/fault.c:1563
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f024505ddab
RSP: 002b:00007ffe72238688 EFLAGS: 00010202
RAX: 0000000020000180 RBX: 00007ffe72238798 RCX: 0000000000737562
RDX: 0000000000000006 RSI: 0000000075622f2e RDI: 0000000020000180
RBP: 0000000000000048 R08: 00007f0245000000 R09: 00007f02451ac12c
R10: 00007f0244c0b1c8 R11: 0000000000000246 R12: 00007f0244c0b1c8
R13: fffffffffffffffe R14: 00007f0244c00000 R15: 00007f0244c0b1d0
 </TASK>
INFO: task syz-executor.1:2732 blocked for more than 144 seconds.
      Not tainted 6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:21808 pid:2732  tgid:2731  ppid:5085   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
 rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
 inode_lock include/linux/fs.h:802 [inline]
 btrfs_inode_lock+0x4d/0xd0 fs/btrfs/inode.c:378
 btrfs_buffered_write+0x230/0x1380 fs/btrfs/file.c:1204
 btrfs_do_write_iter+0x2bb/0x1190 fs/btrfs/file.c:1687
 do_iter_readv_writev+0x330/0x4a0
 do_iter_write+0x1f6/0x8d0 fs/read_write.c:860
 iter_file_splice_write+0x86d/0x1010 fs/splice.c:736
 do_splice_from fs/splice.c:933 [inline]
 direct_splice_actor+0xea/0x1c0 fs/splice.c:1142
 splice_direct_to_actor+0x376/0x9e0 fs/splice.c:1088
 do_splice_direct+0x2ac/0x3f0 fs/splice.c:1194
 do_sendfile+0x62c/0x1000 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f024507cd29
RSP: 002b:00007f0245e3d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f02451abf80 RCX: 00007f024507cd29
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000008
RBP: 00007f02450c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f02451abf80 R15: 00007ffe722385a8
 </TASK>
INFO: task syz-executor.1:2830 blocked for more than 145 seconds.
      Not tainted 6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:23480 pid:2830  tgid:2731  ppid:5085   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 wait_extent_bit fs/btrfs/extent-io-tree.c:799 [inline]
 lock_extent+0x69d/0x850 fs/btrfs/extent-io-tree.c:1843
 btrfs_page_mkwrite+0x5bd/0xd10 fs/btrfs/inode.c:8158
 do_page_mkwrite+0x197/0x470 mm/memory.c:2944
 wp_page_shared mm/memory.c:3339 [inline]
 do_wp_page+0x1d07/0x4d40 mm/memory.c:3479
 handle_pte_fault mm/memory.c:5055 [inline]
 __handle_mm_fault mm/memory.c:5180 [inline]
 handle_mm_fault+0x1b1c/0x6680 mm/memory.c:5345
 do_user_addr_fault arch/x86/mm/fault.c:1415 [inline]
 handle_page_fault arch/x86/mm/fault.c:1507 [inline]
 exc_page_fault+0x2ad/0x870 arch/x86/mm/fault.c:1563
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:rep_movs_alternative+0x33/0x70 arch/x86/lib/copy_user_64.S:58
Code: 40 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:ffffc90016c87550 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 0000000020000218 RCX: 0000000000000038
RDX: 0000000000000000 RSI: ffffc90016c87600 RDI: 00000000200001e0
RBP: ffffc90016c876b0 R08: ffffc90016c87637 R09: 1ffff92002d90ec6
R10: dffffc0000000000 R11: fffff52002d90ec7 R12: 0000000000000038
R13: ffffc90016c87600 R14: 00000000200001e0 R15: ffffc90016c87600
 copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:133 [inline]
 _copy_to_user+0x86/0xa0 lib/usercopy.c:41
 copy_to_user include/linux/uaccess.h:191 [inline]
 fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:145
 emit_last_fiemap_cache fs/btrfs/extent_io.c:2511 [inline]
 extent_fiemap+0x1b9c/0x1fe0 fs/btrfs/extent_io.c:3038
 btrfs_fiemap+0x178/0x1e0 fs/btrfs/inode.c:7830
 ioctl_fiemap fs/ioctl.c:220 [inline]
 do_vfs_ioctl+0x19ea/0x2b40 fs/ioctl.c:811
 __do_sys_ioctl fs/ioctl.c:869 [inline]
 __se_sys_ioctl+0x81/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f024507cd29
RSP: 002b:00007f0245e1c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f02451ac050 RCX: 00007f024507cd29
RDX: 00000000200001c0 RSI: 00000000c020660b RDI: 0000000000000008
RBP: 00007f02450c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f02451ac050 R15: 00007ffe722385a8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 #0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:2/42:
 #0: ffff888012c71938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
 #0: ffff888012c71938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
 #1: ffff8880b9828808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
2 locks held by getty/4808:
 #0: ffff88802ae300a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.4/5093:
5 locks held by syz-executor.0/5094:
2 locks held by kworker/1:5/5152:
 #0: ffff888012c72938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
 #0: ffff888012c72938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
 #1: ffffc900047f7d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
 #1: ffffc900047f7d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
3 locks held by syz-executor.1/2731:
 #0: ffff8880296b4658 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:663 [inline]
 #0: ffff8880296b4658 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x2f6/0x6f0 mm/memory.c:5501
 #1: ffff888078748510 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x197/0x470 mm/memory.c:2944
 #2: ffff88803ca56a28 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x49c/0xd10 fs/btrfs/inode.c:8147
2 locks held by syz-executor.1/2732:
 #0: ffff888078748418 (sb_writers#13){.+.+}-{0:0}, at: do_sendfile+0x607/0x1000 fs/read_write.c:1253
 #1: ffff88803ca56ba0 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
 #1: ffff88803ca56ba0 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: btrfs_inode_lock+0x4d/0xd0 fs/btrfs/inode.c:378
4 locks held by syz-executor.1/2830:
 #0: ffff88803ca56ba0 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
 #0: ffff88803ca56ba0 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: btrfs_inode_lock+0x60/0xd0 fs/btrfs/inode.c:370
 #1: ffff888012c6a7a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
 #1: ffff888012c6a7a0 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5372 [inline]
 #1: ffff888012c6a7a0 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2d0 mm/memory.c:5432
 #2: ffff888078748510 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x197/0x470 mm/memory.c:2944
 #3: ffff88803ca56a28 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x49c/0xd10 fs/btrfs/inode.c:8147
2 locks held by syz-executor.4/5652:

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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+0x198/0x310 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xfaf/0xff0 kernel/hung_task.c:379
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5648 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:arch_exit_to_user_mode arch/x86/include/asm/entry-common.h:95 [inline]
RIP: 0010:__exit_to_user_mode kernel/entry/common.c:135 [inline]
RIP: 0010:irqentry_exit_to_user_mode+0x22/0x50 kernel/entry/common.c:311
Code: e8 93 0c 00 00 eb a1 90 66 0f 1f 00 90 e8 b6 ad 61 f6 90 90 e8 bf 54 7d f6 e8 aa f0 54 f6 90 66 90 66 90 0f 00 2d 3c 48 54 00 <f3> 0f 1e fa e8 e5 c4 ff ff 48 8b 3c 24 e9 8c f1 ff ff f3 0f 1e fa
RSP: 0000:ffffc90015827ef0 EFLAGS: 00000046
RAX: c7e771a697c01400 RBX: 0000000000000000 RCX: ffffffff925d0303
RDX: dffffc0000000000 RSI: ffffffff8b6ab6e0 RDI: ffffffff8bbde520
RBP: 0000000000000000 R08: ffffffff8f00c42f R09: 1ffffffff1e01885
R10: dffffc0000000000 R11: fffffbfff1e01886 R12: ffff88807b950000
R13: 0000000000000004 R14: 0000000000000254 R15: ffffc90015827f58
FS:  00007f62812ff6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f62772f1000 CR3: 00000000256a0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 exc_page_fault+0x587/0x870 arch/x86/mm/fault.c:1566
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f6280628836
Code: f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007f62812fe520 EFLAGS: 00010206
RAX: 00000000008f1001 RBX: 00007f62812fe5c0 RCX: 0000000000000068
RDX: 0000000000000015 RSI: 0000000000000001 RDI: 00007f62812fe660
RBP: 0000000000000102 R08: 00007f6276a00000 R09: 00000000008f1000
R10: 0000000000000000 R11: 00007f62812fe5d0 R12: 0000000000000001
R13: 00007f62806eb780 R14: 0000000000000000 R15: 00007f62812fe660
 </TASK>