assertion failed: block_start != EXTENT_MAP_HOLE, in fs/btrfs/extent_io.c:1721
------------[ cut here ]------------
kernel BUG at fs/btrfs/extent_io.c:1721!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5335 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:submit_one_sector fs/btrfs/extent_io.c:1721 [inline]
RIP: 0010:extent_writepage_io+0x1070/0x11a0 fs/btrfs/extent_io.c:1826
Code: 27 fd 90 0f 0b e8 d0 6f c6 fd 48 c7 c7 20 c6 17 8c 48 c7 c6 40 dd 17 8c 48 c7 c2 a0 c6 17 8c b9 b9 06 00 00 e8 a1 ad 27 fd 90 <0f> 0b e8 a9 6f c6 fd 48 89 ef 48 c7 c6 00 ce 17 8c e8 aa 0c 28 fd
RSP: 0018:ffffc9000e7ce0c0 EFLAGS: 00010246
RAX: 000000000000004e RBX: ffffea000151b1c8 RCX: 7bb6caedef876200
RDX: ffffc90020001000 RSI: 00000000000736bb RDI: 00000000000736bc
RBP: ffffea000151b1c0 R08: ffffc9000e7cde47 R09: 1ffff92001cf9bc8
R10: dffffc0000000000 R11: fffff52001cf9bc9 R12: 0000000000001000
R13: dffffc0000000000 R14: ffff8880531abe18 R15: fffffffffffffffd
FS:  00007f5b50def6c0(0000) GS:ffff88808c815000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5b44dff000 CR3: 0000000042cbd000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 extent_writepage fs/btrfs/extent_io.c:1936 [inline]
 extent_write_cache_pages fs/btrfs/extent_io.c:2593 [inline]
 btrfs_writepages+0x17a1/0x28b0 fs/btrfs/extent_io.c:2725
 do_writepages+0x338/0x560 mm/page-writeback.c:2571
 filemap_writeback mm/filemap.c:387 [inline]
 filemap_fdatawrite_range+0x1ef/0x2f0 mm/filemap.c:412
 btrfs_start_ordered_extent_nowriteback+0x305/0x6e0 fs/btrfs/ordered-data.c:-1
 btrfs_start_ordered_extent fs/btrfs/ordered-data.h:203 [inline]
 btrfs_page_mkwrite+0x853/0x1a40 fs/btrfs/file.c:1935
 do_page_mkwrite+0x147/0x310 mm/memory.c:3684
 wp_page_shared mm/memory.c:4085 [inline]
 do_wp_page+0x1973/0x4c70 mm/memory.c:4304
 handle_pte_fault mm/memory.c:6395 [inline]
 __handle_mm_fault mm/memory.c:6517 [inline]
 handle_mm_fault+0x1490/0x3080 mm/memory.c:6686
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x1678/0x2720 mm/gup.c:1428
 __get_user_pages_locked mm/gup.c:1692 [inline]
 __gup_longterm_locked+0x115b/0x15c0 mm/gup.c:2476
 gup_fast_fallback+0x1d8c/0x20e0 mm/gup.c:3209
 iov_iter_extract_user_pages lib/iov_iter.c:1763 [inline]
 iov_iter_extract_pages+0x369/0x5f0 lib/iov_iter.c:1826
 iov_iter_extract_bvecs+0xb1/0x920 lib/iov_iter.c:1917
 bio_iov_iter_get_pages+0x352/0x940 block/bio.c:1266
 blkdev_iov_iter_get_pages block/fops.c:49 [inline]
 __blkdev_direct_IO+0x656/0xf30 block/fops.c:219
 blkdev_direct_IO+0x122e/0x17a0 block/fops.c:435
 blkdev_read_iter+0x223/0x420 block/fops.c:814
 aio_read+0x33a/0x4d0 fs/aio.c:1656
 __io_submit_one fs/aio.c:-1 [inline]
 io_submit_one+0x774/0x13d0 fs/aio.c:2106
 __do_sys_io_submit fs/aio.c:2165 [inline]
 __se_sys_io_submit+0x195/0x340 fs/aio.c:2135
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5b4ff9de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5b50deefe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007f5b50226090 RCX: 00007f5b4ff9de59
RDX: 00002000000000c0 RSI: 00000000000000ca RDI: 00007f5b50dce000
RBP: 00007f5b50033e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5b50226128 R14: 00007f5b50226090 R15: 00007fff9523fce8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:submit_one_sector fs/btrfs/extent_io.c:1721 [inline]
RIP: 0010:extent_writepage_io+0x1070/0x11a0 fs/btrfs/extent_io.c:1826
Code: 27 fd 90 0f 0b e8 d0 6f c6 fd 48 c7 c7 20 c6 17 8c 48 c7 c6 40 dd 17 8c 48 c7 c2 a0 c6 17 8c b9 b9 06 00 00 e8 a1 ad 27 fd 90 <0f> 0b e8 a9 6f c6 fd 48 89 ef 48 c7 c6 00 ce 17 8c e8 aa 0c 28 fd
RSP: 0018:ffffc9000e7ce0c0 EFLAGS: 00010246
RAX: 000000000000004e RBX: ffffea000151b1c8 RCX: 7bb6caedef876200
RDX: ffffc90020001000 RSI: 00000000000736bb RDI: 00000000000736bc
RBP: ffffea000151b1c0 R08: ffffc9000e7cde47 R09: 1ffff92001cf9bc8
R10: dffffc0000000000 R11: fffff52001cf9bc9 R12: 0000000000001000
R13: dffffc0000000000 R14: ffff8880531abe18 R15: fffffffffffffffd
FS:  00007f5b50def6c0(0000) GS:ffff88808c815000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5b44dff000 CR3: 0000000042cbd000 CR4: 0000000000352ef0