INFO: task syz-executor426:5058 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor426 state:D stack:24192 pid:5058  tgid:5058  ppid:5057   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 wait_extent_bit fs/btrfs/extent-io-tree.c:799 [inline]
 lock_extent+0x657/0x730 fs/btrfs/extent-io-tree.c:1843
 btrfs_page_mkwrite+0x653/0x11e0 fs/btrfs/inode.c:8158
 do_page_mkwrite+0x17a/0x380 mm/memory.c:2944
 wp_page_shared mm/memory.c:3339 [inline]
 do_wp_page+0xaa9/0x36b0 mm/memory.c:3479
 handle_pte_fault mm/memory.c:5055 [inline]
 __handle_mm_fault+0x1d7d/0x3d70 mm/memory.c:5180
 handle_mm_fault+0x47a/0xa10 mm/memory.c:5345
 do_user_addr_fault+0x3d1/0x1000 arch/x86/mm/fault.c:1413
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x5d/0xc0 arch/x86/mm/fault.c:1561
 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 66 2e 0f 1f 84 00 00 00 00 00 66 90 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:ffffc9000335f8d8 EFLAGS: 00050206
RAX: 0000000000000000 RBX: 0000000000000038 RCX: 0000000000000038
RDX: fffff5200066bf32 RSI: ffffc9000335f958 RDI: 00000000200000e0
RBP: 00000000200000e0 R08: 0000000000000000 R09: fffff5200066bf31
R10: ffffc9000335f98f R11: ffffffff915eab48 R12: ffffc9000335f958
R13: 0000000020000118 R14: 0000000000000000 R15: 0000000000000000
 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 lib/usercopy.c:41 [inline]
 _copy_to_user+0xa8/0xb0 lib/usercopy.c:34
 copy_to_user include/linux/uaccess.h:191 [inline]
 fiemap_fill_next_extent+0x232/0x380 fs/ioctl.c:145
 emit_last_fiemap_cache fs/btrfs/extent_io.c:2510 [inline]
 extent_fiemap+0x13e0/0x19f0 fs/btrfs/extent_io.c:3037
 btrfs_fiemap+0xe4/0x160 fs/btrfs/inode.c:7830
 ioctl_fiemap fs/ioctl.c:220 [inline]
 do_vfs_ioctl+0x339/0x1920 fs/ioctl.c:811
 __do_sys_ioctl fs/ioctl.c:869 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x112/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fc5abf0bb19
RSP: 002b:00007fff3dd8de88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020000080 RCX: 00007fc5abf0bb19
RDX: 00000000200000c0 RSI: 00000000c020660b RDI: 0000000000000004
RBP: 00007fc5abf835f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff3dd8dec0
R13: 00007fff3dd8e0e8 R14: 431bde82d7b634db R15: 00007fc5abf5403b
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/28:
 #0: ffffffff8cfa82e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 #0: ffffffff8cfa82e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #0: ffffffff8cfa82e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4810:
 #0: ffff88802618a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900020582f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201
4 locks held by syz-executor426/5058:
 #0: ffff888076afc648 (&sb->s_type->i_mutex_key#15){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
 #0: ffff888076afc648 (&sb->s_type->i_mutex_key#15){++++}-{3:3}, at: btrfs_inode_lock+0xf9/0x100 fs/btrfs/inode.c:370
 #1: ffff88801fdce1e0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
 #1: ffff88801fdce1e0 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5372 [inline]
 #1: ffff88801fdce1e0 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x35/0x580 mm/memory.c:5432
 #2: ffff88807f22a510 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x380 mm/memory.c:2944
 #3: ffff888076afc4d0 (&ei->i_mmap_lock){.+.+}-{3:3}, at: btrfs_page_mkwrite+0x6e4/0x11e0 fs/btrfs/inode.c:8147

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.7.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 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: 4497 Comm: klogd Not tainted 6.7.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:page_ext_get+0x0/0x310 mm/page_ext.c:505
Code: 56 9f f5 ff e9 2f fe ff ff 48 89 df e8 49 9f f5 ff e9 33 ff ff ff 48 89 df e8 3c 9f f5 ff e9 6b ff ff ff 0f 1f 80 00 00 00 00 <66> 0f 1f 00 41 55 41 54 55 53 48 89 fb e8 0e bb 9f ff e8 19 0e 88
RSP: 0018:ffffc900033b73e0 EFLAGS: 00000086
RAX: 0000000007e80198 RBX: ffffea0000861640 RCX: ffffffff81e53aa8
RDX: ffff88807b92c180 RSI: ffffffff81e539fe RDI: ffffea0000861640
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000007e80198 R11: dffffc0000000000 R12: 00000000002420c0
R13: 0000000007e80198 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f3bec764380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e80cefa600 CR3: 000000007b8bd000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __set_page_owner+0x2a/0x60 mm/page_owner.c:194
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1544 [inline]
 get_page_from_freelist+0xa25/0x36d0 mm/page_alloc.c:3312
 __alloc_pages+0x22e/0x2420 mm/page_alloc.c:4568
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 kmem_getpages mm/slab.c:1356 [inline]
 cache_grow_begin+0x99/0x3a0 mm/slab.c:2550
 cache_alloc_refill+0x295/0x3b0 mm/slab.c:2923
 ____cache_alloc mm/slab.c:2999 [inline]
 ____cache_alloc mm/slab.c:2982 [inline]
 __do_cache_alloc mm/slab.c:3182 [inline]
 slab_alloc_node mm/slab.c:3230 [inline]
 kmem_cache_alloc_node+0x3e6/0x4a0 mm/slab.c:3509
 __alloc_skb+0x287/0x330 net/core/skbuff.c:641
 alloc_skb include/linux/skbuff.h:1286 [inline]
 alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331
 sock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780
 unix_dgram_sendmsg+0x464/0x1ca0 net/unix/af_unix.c:1974
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 __sys_sendto+0x255/0x340 net/socket.c:2190
 __do_sys_sendto net/socket.c:2202 [inline]
 __se_sys_sendto net/socket.c:2198 [inline]
 __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f3bec8c69b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc9b6fb768 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3bec8c69b5
RDX: 000000000000003d RSI: 0000560a4d136a70 RDI: 0000000000000003
RBP: 0000560a4d1302c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007f3beca54212 R14: 00007ffc9b6fb868 R15: 0000000000000000
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.016 msecs