INFO: task syz-executor.4:18326 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:22408 pid:18326 ppid:5104   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+0x501/0x3620 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:copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:166
Code: d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 2c 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 0f 01 cb 83 fa 40 72 34 89 d1 <f3> a4 31 c0 0f 01 ca c3 89 ca eb 06 66 0f 1f 44 00 00 83 f8 12 74
RSP: 0018:ffffc90016f57e50 EFLAGS: 00050206
RAX: ffffffff84302a01 RBX: 00007fffffffec00 RCX: 0000000000000400
RDX: 0000000000000400 RSI: ffff888050f71800 RDI: 00000000200003c0
RBP: 00000000200003c0 R08: dffffc0000000000 R09: ffffed100a1ee380
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000400
R13: ffff8880343f8000 R14: 00000000200003c0 R15: ffff888050f71800
 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+0xed/0x130 lib/usercopy.c:41
 copy_to_user include/linux/uaccess.h:169 [inline]
 btrfs_ioctl_balance+0x5d6/0x7c0 fs/btrfs/ioctl.c:3596
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xf1/0x160 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: 0033:0x7f48fb88c169
RSP: 002b:00007f48fc64e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f48fb9abf80 RCX: 00007f48fb88c169
RDX: 00000000200003c0 RSI: 00000000c4009420 RDI: 0000000000000005
RBP: 00007f48fb8e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe022bf43f R14: 00007f48fc64e300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.4:18427 blocked for more than 144 seconds.
      Not tainted 6.3.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:21768 pid:18427 ppid:5104   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
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760
 rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
 inode_lock include/linux/fs.h:758 [inline]
 btrfs_inode_lock+0x4d/0xd0 fs/btrfs/inode.c:177
 btrfs_sync_file+0x43e/0x10b0 fs/btrfs/file.c:1817
 generic_write_sync include/linux/fs.h:2452 [inline]
 btrfs_do_write_iter+0xccc/0x1270 fs/btrfs/file.c:1684
 do_iter_write+0x6ea/0xc50 fs/read_write.c:861
 iter_file_splice_write+0x843/0xfe0 fs/splice.c:778
 do_splice_from fs/splice.c:856 [inline]
 direct_splice_actor+0xe7/0x1c0 fs/splice.c:1022
 splice_direct_to_actor+0x4c4/0xbd0 fs/splice.c:977
 do_splice_direct+0x283/0x3d0 fs/splice.c:1065
 do_sendfile+0x620/0xff0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309
 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: 0033:0x7f48fb88c169
RSP: 002b:00007f48fc62d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f48fb9ac050 RCX: 00007f48fb88c169
RDX: 0000000000000000 RSI: 000000000000000c RDI: 000000000000000b
RBP: 00007f48fb8e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe022bf43f R14: 00007f48fc62d300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.4:18433 blocked for more than 144 seconds.
      Not tainted 6.3.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:22016 pid:18433 ppid:5104   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+0x501/0x3620 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: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:ffffc90016f274d0 EFLAGS: 00050202
RAX: ffffffff84302a01 RBX: 00007fffffffefc8 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffffc90016f27580 RDI: 0000000020000020
RBP: ffffc90016f27628 R08: 0000000000000000 R09: fffff52002de4eb7
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000038
R13: ffffc90016f27580 R14: 0000000020000020 R15: ffffc90016f27580
 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+0xed/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_fiemap_extent+0x242/0x3f0 fs/btrfs/extent_io.c:3002
 extent_fiemap+0xfd1/0x2150 fs/btrfs/extent_io.c:3492
 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: 0033:0x7f48fb88c169
RSP: 002b:00007f48fc60c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f48fb9ac120 RCX: 00007f48fb88c169
RDX: 0000000020000000 RSI: 00000000c020660b RDI: 000000000000000a
RBP: 00007f48fb8e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe022bf43f R14: 00007f48fc60c300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8cf25570 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8cf25d70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
 #0: ffffffff8cf253a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4745:
 #0: ffff888149f29098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
2 locks held by syz-executor.5/5093:
 #0: ffff88808dd7a0e0 (&type->s_umount_key#49){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361
 #1: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
 #1: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:989
1 lock held by syz-executor.0/5116:
 #0: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
 #0: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:989
2 locks held by kworker/0:18/8277:
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
 #1: ffffc90017007d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
5 locks held by syz-executor.4/18326:
 #0: ffff88802c38c460 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write_file+0x5e/0x1f0 fs/namespace.c:438
 #1: ffff8880343f9440 (&fs_info->balance_mutex){+.+.}-{3:3}, at: btrfs_balance+0xbeb/0x1120 fs/btrfs/volumes.c:4397
 #2: ffff88807a49c998 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 #2: ffff88807a49c998 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1348 [inline]
 #2: ffff88807a49c998 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1498 [inline]
 #2: ffff88807a49c998 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18e/0x7c0 arch/x86/mm/fault.c:1554
 #3: ffff88802c38c558 (sb_pagefaults#3){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
 #4: ffff8880736feae8 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x425/0xc90 fs/btrfs/inode.c:8152
2 locks held by syz-executor.4/18427:
 #0: ffff88802c38c460 (sb_writers#17){.+.+}-{0:0}, at: do_sendfile+0x5fb/0xff0 fs/read_write.c:1254
 #1: ffff8880736fec60 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #1: ffff8880736fec60 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: btrfs_inode_lock+0x4d/0xd0 fs/btrfs/inode.c:177
4 locks held by syz-executor.4/18433:
 #0: ffff8880736fec60 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
 #0: ffff8880736fec60 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: btrfs_inode_lock+0x60/0xd0 fs/btrfs/inode.c:169
 #1: ffff88807a49c998 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 #1: ffff88807a49c998 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1348 [inline]
 #1: ffff88807a49c998 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1498 [inline]
 #1: ffff88807a49c998 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18e/0x7c0 arch/x86/mm/fault.c:1554
 #2: ffff88802c38c558 (sb_pagefaults#3){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
 #3: ffff8880736feae8 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x425/0xc90 fs/btrfs/inode.c:8152

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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+0x270/0x300 kernel/kthread.c:376
 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: 6000 Comm: kworker/u4:7 Not tainted 6.3.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:lock_release+0x24/0x9d0 kernel/locking/lockdep.c:5677
Code: ff 0f 1f 44 00 00 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 00 01 00 00 49 89 f5 48 89 7c 24 20 <65> 48 8b 04 25 28 00 00 00 48 89 84 24 e0 00 00 00 49 bf 00 00 00
RSP: 0018:ffffc90015f87920 EFLAGS: 00000282
RAX: ffffffff8a6a539e RBX: 0000000000000001 RCX: ffff888077208000
RDX: 0000000000000000 RSI: ffffffff8a6a5395 RDI: ffffffff8cf253a0
RBP: ffffc90015f87a50 R08: ffffffff8a6a8de2 R09: fffffbfff205b639
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801efd47c0
R13: ffffffff8a6a5395 R14: dffffc0000000000 R15: ffff88801efd47d0
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b562d56be CR3: 000000001cff6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rcu_read_unlock include/linux/rcupdate.h:806 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:771 [inline]
 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:825 [inline]
 batadv_iv_ogm_schedule+0x6e2/0x1010 net/batman-adv/bat_iv_ogm.c:868
 batadv_iv_send_outstanding_bat_ogm_packet+0x6fe/0x810 net/batman-adv/bat_iv_ogm.c:1712
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
 kthread+0x270/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>