EXT4-fs error (device loop0): ext4_read_block_bitmap_nowait:476: comm syz-executor.0: Invalid block bitmap block 0 in block_group 0
EXT4-fs (loop0): Remounting filesystem read-only
EXT4-fs error (device loop0) in ext4_mb_clear_bb:5614: Corrupt filesystem
==================================================================
BUG: KASAN: out-of-bounds in ext4_ext_rm_leaf fs/ext4/extents.c:2730 [inline]
BUG: KASAN: out-of-bounds in ext4_ext_remove_space+0x1fbc/0x4e10 fs/ext4/extents.c:2952
Read of size 18446744073709551544 at addr ffff888122b04054 by task syz-executor.0/359

CPU: 0 PID: 359 Comm: syz-executor.0 Not tainted 5.10.194-syzkaller-989230-ga27512601c2d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:452
 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189
 memmove+0x2d/0x70 mm/kasan/shadow.c:54
 ext4_ext_rm_leaf fs/ext4/extents.c:2730 [inline]
 ext4_ext_remove_space+0x1fbc/0x4e10 fs/ext4/extents.c:2952
 ext4_punch_hole+0x720/0xb10 fs/ext4/inode.c:4205
 ext4_fallocate+0x2e8/0x1ca0 fs/ext4/extents.c:4704
 vfs_fallocate+0x492/0x570 fs/open.c:310
 do_vfs_ioctl+0x1686/0x1a30 fs/ioctl.c:732
 __do_sys_ioctl fs/ioctl.c:751 [inline]
 __se_sys_ioctl+0x99/0x190 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f905823dae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f904f9df0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f905835d050 RCX: 00007f905823dae9
RDX: 0000000020000080 RSI: 000000004030582b RDI: 0000000000000004
RBP: 00007f905828947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f905835d050 R15: 00007fff0dc3ce98

The buggy address belongs to the page:
page:ffffea00048ac100 refcount:2 mapcount:0 mapping:ffff88810044ad10 index:0x3a pfn:0x122b04
aops:def_blk_aops ino:0
flags: 0x4000000000002036(referenced|uptodate|lru|active|private)
raw: 4000000000002036 ffffea000430ef48 ffff8881206f3030 ffff88810044ad10
raw: 000000000000003a ffff88811c7861f8 00000002ffffffff ffff8881206ea000
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8881206ea000
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Movable, gfp_mask 0x108c48(GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL|__GFP_MOVABLE), pid 355, ts 41334536843, free_ts 0
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x166/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5346
 __alloc_pages include/linux/gfp.h:544 [inline]
 __alloc_pages_node include/linux/gfp.h:557 [inline]
 alloc_pages_node include/linux/gfp.h:571 [inline]
 alloc_pages include/linux/gfp.h:590 [inline]
 __page_cache_alloc include/linux/pagemap.h:290 [inline]
 pagecache_get_page+0x669/0x950 mm/filemap.c:1848
 find_or_create_page include/linux/pagemap.h:402 [inline]
 grow_dev_page fs/buffer.c:976 [inline]
 grow_buffers fs/buffer.c:1045 [inline]
 __getblk_slow fs/buffer.c:1072 [inline]
 __getblk_gfp+0x221/0x7e0 fs/buffer.c:1370
 sb_getblk_gfp include/linux/buffer_head.h:368 [inline]
 ext4_ext_grow_indepth fs/ext4/extents.c:1325 [inline]
 ext4_ext_create_new_leaf fs/ext4/extents.c:1424 [inline]
 ext4_ext_insert_extent+0xf88/0x4d20 fs/ext4/extents.c:2094
 ext4_ext_map_blocks+0x1b4c/0x6be0 fs/ext4/extents.c:4302
 ext4_map_blocks+0xaa7/0x1ec0 fs/ext4/inode.c:646
 _ext4_get_block+0x21b/0x610 fs/ext4/inode.c:793
 ext4_get_block+0x39/0x50 fs/ext4/inode.c:810
 ext4_block_write_begin+0x61e/0x13b0 fs/ext4/inode.c:1077
 ext4_write_begin+0x6fa/0x1730
 ext4_da_write_begin+0x49d/0xf60 fs/ext4/inode.c:3021
 generic_perform_write+0x2cd/0x570 mm/filemap.c:3506
 ext4_buffered_write_iter+0x482/0x610 fs/ext4/file.c:271
 ext4_file_write_iter+0x193/0x1c80 fs/ext4/file.c:685
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888122b03f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888122b03f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888122b04000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                 ^
 ffff888122b04080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888122b04100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
EXT4-fs error (device loop0): __ext4_get_inode_loc:4426: comm syz-executor.0: Invalid inode table block 0 in block_group 0
EXT4-fs error (device loop0) in ext4_reserve_inode_write:5886: Corrupt filesystem
EXT4-fs error (device loop0): ext4_punch_hole:4218: inode #16: comm syz-executor.0: mark_inode_dirty error