EXT4-fs (loop4): Remounting filesystem read-only
==================================================================
BUG: KASAN: out-of-bounds in ext4_ext_rm_leaf fs/ext4/extents.c:2735 [inline]
BUG: KASAN: out-of-bounds in ext4_ext_remove_space+0x2149/0x4a60 fs/ext4/extents.c:2957
Read of size 18446744073709551604 at addr ffff88813a087018 by task syz-executor.4/6141

CPU: 0 PID: 6141 Comm: syz-executor.4 Tainted: G        W         5.15.149-syzkaller-00055-g424f92bcbe8f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description+0x87/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:444
 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:2735 [inline]
 ext4_ext_remove_space+0x2149/0x4a60 fs/ext4/extents.c:2957
 ext4_punch_hole+0x794/0xbf0 fs/ext4/inode.c:4119
 ext4_fallocate+0x30c/0x1f10 fs/ext4/extents.c:4711
 vfs_fallocate+0x492/0x570 fs/open.c:309
 ksys_fallocate fs/open.c:332 [inline]
 __do_sys_fallocate fs/open.c:340 [inline]
 __se_sys_fallocate fs/open.c:338 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:338
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f43ab876ee9
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:00007f43aa5ca0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f43ab9ae070 RCX: 00007f43ab876ee9
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f43ab8c347f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001a00 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f43ab9ae070 R15: 00007fff741339c8
 </TASK>

The buggy address belongs to the page:
page:ffffea0004e821c0 refcount:2 mapcount:0 mapping:ffff8881091924d8 index:0x27 pfn:0x13a087
memcg:ffff88810bb28000
aops:def_blk_aops ino:700004
flags: 0x4000000000002036(referenced|uptodate|lru|active|private|zone=1)
raw: 4000000000002036 ffffea0004c14c48 ffffea0004e4cd88 ffff8881091924d8
raw: 0000000000000027 ffff88812ba17dc8 00000002ffffffff ffff88810bb28000
page dumped because: kasan: bad access detected
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 6132, ts 849610598294, free_ts 848231730233
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2610
 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484
 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776
 __alloc_pages_node include/linux/gfp.h:591 [inline]
 alloc_pages_node include/linux/gfp.h:605 [inline]
 alloc_pages include/linux/gfp.h:618 [inline]
 __page_cache_alloc include/linux/pagemap.h:305 [inline]
 pagecache_get_page+0xb18/0xeb0 mm/filemap.c:1946
 find_or_create_page include/linux/pagemap.h:418 [inline]
 grow_dev_page fs/buffer.c:949 [inline]
 grow_buffers fs/buffer.c:1014 [inline]
 __getblk_slow fs/buffer.c:1041 [inline]
 __getblk_gfp+0x21e/0x7c0 fs/buffer.c:1336
 sb_getblk_gfp include/linux/buffer_head.h:368 [inline]
 ext4_ext_grow_indepth fs/ext4/extents.c:1328 [inline]
 ext4_ext_create_new_leaf fs/ext4/extents.c:1429 [inline]
 ext4_ext_insert_extent+0xf7a/0x4b10 fs/ext4/extents.c:2099
 ext4_split_extent_at+0x80e/0x10f0 fs/ext4/extents.c:3253
 ext4_split_extent+0x1bd/0x4e0 fs/ext4/extents.c:3354
 ext4_split_convert_extents fs/ext4/extents.c:3714 [inline]
 ext4_ext_handle_unwritten_extents fs/ext4/extents.c:3876 [inline]
 ext4_ext_map_blocks+0x2147/0x7250 fs/ext4/extents.c:4168
 ext4_map_blocks+0xaa7/0x1e00 fs/ext4/inode.c:646
 _ext4_get_block+0x23b/0x660 fs/ext4/inode.c:793
 ext4_get_block_unwritten+0x2a/0x40 fs/ext4/inode.c:824
 __block_write_begin_int+0x58a/0x1580 fs/buffer.c:2012
 __block_write_begin fs/buffer.c:2062 [inline]
 block_page_mkwrite+0x205/0x270 fs/buffer.c:2525
 ext4_page_mkwrite+0x4c1/0x13a0 fs/ext4/inode.c:6219
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1471 [inline]
 free_pcp_prepare mm/page_alloc.c:1543 [inline]
 free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533
 free_unref_page_list+0x14b/0xa60 mm/page_alloc.c:3670
 release_pages+0x1310/0x1370 mm/swap.c:1009
 __pagevec_release+0x84/0x100 mm/swap.c:1029
 pagevec_release include/linux/pagevec.h:81 [inline]
 shmem_undo_range+0x604/0x1560 mm/shmem.c:965
 shmem_truncate_range mm/shmem.c:1064 [inline]
 shmem_evict_inode+0x215/0x9d0 mm/shmem.c:1146
 evict+0x2a3/0x630 fs/inode.c:587
 iput_final fs/inode.c:1705 [inline]
 iput+0x63b/0x7e0 fs/inode.c:1731
 dentry_unlink_inode+0x34f/0x440 fs/dcache.c:376
 __dentry_kill+0x447/0x660 fs/dcache.c:582
 dentry_kill+0xc0/0x2a0
 dput+0x45/0x80 fs/dcache.c:889
 __fput+0x662/0x910 fs/file_table.c:288
 ____fput+0x15/0x20 fs/file_table.c:308
 task_work_run+0x129/0x190 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0xc48/0x2ca0 kernel/exit.c:878

Memory state around the buggy address:
 ffff88813a086f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88813a086f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88813a087000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                            ^
 ffff88813a087080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88813a087100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
EXT4-fs error (device loop4) in ext4_reserve_inode_write:5820: Corrupt filesystem
EXT4-fs error (device loop4): __ext4_ext_dirty:183: inode #16: comm syz-executor.4: mark_inode_dirty error
EXT4-fs error (device loop4) in ext4_reserve_inode_write:5820: Corrupt filesystem
EXT4-fs error (device loop4): ext4_punch_hole:4132: inode #16: comm syz-executor.4: mark_inode_dirty error