INFO: task syz-executor.0:10587 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc7-syzkaller-00136-g6a66fdd29ea1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:23560 pid:10587 ppid:5131   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:ffffc900162d74d0 EFLAGS: 00050202
RAX: ffffffff84304601 RBX: 00007fffffffefc8 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffffc900162d7580 RDI: 00000000200000e0
RBP: ffffc900162d7628 R08: 0000000000000000 R09: fffff52002c5aeb7
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000038
R13: ffffc900162d7580 R14: 00000000200000e0 R15: ffffc900162d7580
 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: 0033:0x7f75dc88c169
RSP: 002b:00007f75dd6a3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f75dc9abf80 RCX: 00007f75dc88c169
RDX: 00000000200000c0 RSI: 00000000c020660b RDI: 0000000000000005
RBP: 00007f75dc8e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe60c81a5f R14: 00007f75dd6a3300 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
4 locks held by kauditd/27:
1 lock held by khungtaskd/28:
 #0: ffffffff8cf253a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4744:
 #0: ffff88802ae88098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
5 locks held by syz-executor.4/5103:
2 locks held by syz-executor.2/5104:
 #0: ffff88802f47c0e0 (&type->s_umount_key#58){++++}-{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:293 [inline]
 #1: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:989
2 locks held by kworker/0:6/5198:
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
 #1: ffffc900047ffd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
3 locks held by kworker/0:18/6499:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
 #1: ffffc9000335fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
 #2: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
 #2: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:989
2 locks held by kworker/u4:15/6692:
 #0: ffff8880b983be98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:539
 #1: ffff8880274fdab0 (&mm->cid_lock#2){....}-{2:2}, at: mm_cid_get kernel/sched/sched.h:3280 [inline]
 #1: ffff8880274fdab0 (&mm->cid_lock#2){....}-{2:2}, at: switch_mm_cid kernel/sched/sched.h:3302 [inline]
 #1: ffff8880274fdab0 (&mm->cid_lock#2){....}-{2:2}, at: prepare_task_switch kernel/sched/core.c:5117 [inline]
 #1: ffff8880274fdab0 (&mm->cid_lock#2){....}-{2:2}, at: context_switch kernel/sched/core.c:5258 [inline]
 #1: ffff8880274fdab0 (&mm->cid_lock#2){....}-{2:2}, at: __schedule+0x12e4/0x4630 kernel/sched/core.c:6625
3 locks held by kworker/u4:17/6694:
 #0: ffff8880b983be98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:539
 #1: ffff88807a10bfb0 (&mm->cid_lock#2){....}-{2:2}, at: mm_cid_get kernel/sched/sched.h:3280 [inline]
 #1: ffff88807a10bfb0 (&mm->cid_lock#2){....}-{2:2}, at: switch_mm_cid kernel/sched/sched.h:3302 [inline]
 #1: ffff88807a10bfb0 (&mm->cid_lock#2){....}-{2:2}, at: prepare_task_switch kernel/sched/core.c:5117 [inline]
 #1: ffff88807a10bfb0 (&mm->cid_lock#2){....}-{2:2}, at: context_switch kernel/sched/core.c:5258 [inline]
 #1: ffff88807a10bfb0 (&mm->cid_lock#2){....}-{2:2}, at: __schedule+0x12e4/0x4630 kernel/sched/core.c:6625
 #2: ffff88801e5f38d8 (&lo->lo_work_lock){..-.}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:375 [inline]
 #2: ffff88801e5f38d8 (&lo->lo_work_lock){..-.}-{2:2}, at: loop_process_work+0x1d71/0x2220 drivers/block/loop.c:1926
2 locks held by kworker/u4:1/7537:
 #0: ffff8880b983be98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:539
 #1: ffff88807c15dab0 (&mm->cid_lock#2){....}-{2:2}, at: mm_cid_get kernel/sched/sched.h:3280 [inline]
 #1: ffff88807c15dab0 (&mm->cid_lock#2){....}-{2:2}, at: switch_mm_cid kernel/sched/sched.h:3302 [inline]
 #1: ffff88807c15dab0 (&mm->cid_lock#2){....}-{2:2}, at: prepare_task_switch kernel/sched/core.c:5117 [inline]
 #1: ffff88807c15dab0 (&mm->cid_lock#2){....}-{2:2}, at: context_switch kernel/sched/core.c:5258 [inline]
 #1: ffff88807c15dab0 (&mm->cid_lock#2){....}-{2:2}, at: __schedule+0x12e4/0x4630 kernel/sched/core.c:6625
4 locks held by syz-executor.0/10587:
 #0: ffff88802f88e308 (&sb->s_type->i_mutex_key#24){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
 #0: ffff88802f88e308 (&sb->s_type->i_mutex_key#24){++++}-{3:3}, at: btrfs_inode_lock+0x60/0xd0 fs/btrfs/inode.c:169
 #1: ffff88801e0d5b98 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 #1: ffff88801e0d5b98 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault arch/x86/mm/fault.c:1348 [inline]
 #1: ffff88801e0d5b98 (&mm->mmap_lock){++++}-{3:3}, at: handle_page_fault arch/x86/mm/fault.c:1498 [inline]
 #1: ffff88801e0d5b98 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18e/0x7c0 arch/x86/mm/fault.c:1554
 #2: ffff88802282e558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600 mm/memory.c:2925
 #3: ffff88802f88e190 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x425/0xc90 fs/btrfs/inode.c:8152
3 locks held by syz-executor.0/12420:
 #0: ffff88802ae90460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write_file+0x5e/0x1f0 fs/namespace.c:438
 #1: ffff88802f87d440 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #1: ffff88802f87d440 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: vfs_fileattr_set+0x139/0xd40 fs/ioctl.c:681
 #2: ffff88802ae92b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ind_migrate+0x258/0x760 fs/ext4/migrate.c:624
4 locks held by syz-executor.4/12424:

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc7-syzkaller-00136-g6a66fdd29ea1 #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: 12437 Comm: syz-executor.0 Not tainted 6.3.0-rc7-syzkaller-00136-g6a66fdd29ea1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:stack_trace_consume_entry+0x0/0x280 kernel/stacktrace.c:83
Code: 00 e9 5a ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 7b ff ff ff 48 89 df e8 cc d6 67 00 e9 6e ff ff ff e8 42 14 26 09 66 90 <f3> 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 89 fb 48
RSP: 0018:ffffc9000390f658 EFLAGS: 00000286
RAX: ffffffff81f33839 RBX: ffffc9000390f660 RCX: ffffffff8f92e000
RDX: ffffffff8fa8cf01 RSI: ffffffff81f33839 RDI: ffffc9000390f740
RBP: ffffc9000390f6f0 R08: ffffc9000390fef8 R09: ffffc9000390f6b0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888027823a80
R13: ffffffff81786950 R14: ffffc9000390f740 R15: 0000000000000000
FS:  0000555556fb7400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc94db0e800 CR3: 000000004b112000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 arch_stack_walk+0x105/0x140 arch/x86/kernel/stacktrace.c:27
 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_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 __do_kmalloc_node mm/slab_common.c:967 [inline]
 __kmalloc+0xb9/0x230 mm/slab_common.c:980
 kmalloc include/linux/slab.h:584 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
 tomoyo_encode+0x26f/0x530 security/tomoyo/realpath.c:80
 tomoyo_path_perm+0x39f/0x700 security/tomoyo/file.c:831
 tomoyo_path_symlink+0xde/0x120 security/tomoyo/tomoyo.c:211
 security_path_symlink+0xdd/0x130 security/security.c:1212
 do_symlinkat+0x12d/0x610 fs/namei.c:4422
 __do_sys_symlinkat fs/namei.c:4440 [inline]
 __se_sys_symlinkat fs/namei.c:4437 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4437
 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: 0033:0x7fc94da8baa7
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 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:00007ffd9f6a23c8 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc94da8baa7
RDX: 00007fc94dae7d4d RSI: 00000000ffffff9c RDI: 00007ffd9f6a2490
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd9f6a2260
R10: 00007ffd9f6a2117 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd9f6a2490
 </TASK>