EXT4-fs error (device loop2) in ext4_mb_clear_bb:6645: Corrupt filesystem
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BUG: KASAN: out-of-bounds in ext4_ext_rm_leaf fs/ext4/extents.c:2736 [inline]
BUG: KASAN: out-of-bounds in ext4_ext_remove_space+0x2482/0x4d90 fs/ext4/extents.c:2958
Read of size 18446744073709551508 at addr ffff888030c1a078 by task syz-executor.2/14213

CPU: 1 PID: 14213 Comm: syz-executor.2 Not tainted 6.5.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x163/0x540 mm/kasan/report.c:475
 kasan_report+0x175/0x1b0 mm/kasan/report.c:588
 kasan_check_range+0x27e/0x290 mm/kasan/generic.c:187
 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94
 ext4_ext_rm_leaf fs/ext4/extents.c:2736 [inline]
 ext4_ext_remove_space+0x2482/0x4d90 fs/ext4/extents.c:2958
 ext4_punch_hole+0x7a0/0xc10 fs/ext4/inode.c:3977
 ext4_fallocate+0x311/0x1f90 fs/ext4/extents.c:4706
 vfs_fallocate+0x551/0x6b0 fs/open.c:324
 do_vfs_ioctl+0x22cb/0x2b30 fs/ioctl.c:849
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl+0x81/0x170 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: 0033:0x7fb8fce7cae9
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:00007fb8fdbe80c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb8fcf9c120 RCX: 00007fb8fce7cae9
RDX: 0000000020000080 RSI: 000000004030582b RDI: 0000000000000004
RBP: 00007fb8fcec847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fb8fcf9c120 R15: 00007ffd7d52e978
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0000c30680 refcount:2 mapcount:0 mapping:ffff88814880c200 index:0x2b pfn:0x30c1a
memcg:ffff888016f40000
aops:def_blk_aops ino:700002
flags: 0xfff00000002036(referenced|uptodate|lru|active|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000002036 ffffea0000c10a08 ffff888017383030 ffff88814880c200
raw: 000000000000002b ffff888032d15570 00000002ffffffff ffff888016f40000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 14200, tgid 14199 (syz-executor.2), ts 619260415656, free_ts 618852290845
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1570
 prep_new_page mm/page_alloc.c:1577 [inline]
 get_page_from_freelist+0x31e8/0x3370 mm/page_alloc.c:3221
 __alloc_pages+0x255/0x670 mm/page_alloc.c:4477
 folio_alloc+0x1e/0x60 mm/mempolicy.c:2302
 filemap_alloc_folio+0xde/0x500 mm/filemap.c:979
 __filemap_get_folio+0x323/0xa00 mm/filemap.c:1933
 grow_dev_page fs/buffer.c:1063 [inline]
 grow_buffers fs/buffer.c:1123 [inline]
 __getblk_slow fs/buffer.c:1150 [inline]
 __getblk_gfp+0x218/0x630 fs/buffer.c:1445
 sb_getblk_gfp include/linux/buffer_head.h:376 [inline]
 ext4_ext_grow_indepth fs/ext4/extents.c:1334 [inline]
 ext4_ext_create_new_leaf fs/ext4/extents.c:1435 [inline]
 ext4_ext_insert_extent+0xfe3/0x4e60 fs/ext4/extents.c:2102
 ext4_ext_map_blocks+0x1bdc/0x71d0 fs/ext4/extents.c:4306
 ext4_map_blocks+0xa2f/0x1cb0 fs/ext4/inode.c:621
 _ext4_get_block+0x238/0x6a0 fs/ext4/inode.c:763
 ext4_block_write_begin+0x53d/0x1570 fs/ext4/inode.c:1043
 ext4_write_begin+0x619/0x10b0
 ext4_da_write_begin+0x300/0xa40 fs/ext4/inode.c:2867
 generic_perform_write+0x31b/0x630 mm/filemap.c:3923
 ext4_buffered_write_iter+0xc6/0x350 fs/ext4/file.c:299
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1161 [inline]
 free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2348
 free_unref_page_list+0x596/0x830 mm/page_alloc.c:2489
 release_pages+0x2193/0x2470 mm/swap.c:1042
 __folio_batch_release+0x84/0x100 mm/swap.c:1062
 folio_batch_release include/linux/pagevec.h:83 [inline]
 shmem_undo_range+0x6af/0x1ba0 mm/shmem.c:954
 shmem_truncate_range mm/shmem.c:1049 [inline]
 shmem_evict_inode+0x258/0x9f0 mm/shmem.c:1164
 evict+0x2a4/0x620 fs/inode.c:665
 __dentry_kill+0x436/0x650 fs/dcache.c:607
 dentry_kill+0xbb/0x290
 dput+0x1f3/0x420 fs/dcache.c:913
 __fput+0x628/0x950 fs/file_table.c:392
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86

Memory state around the buggy address:
 ffff888030c19f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888030c19f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888030c1a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                                ^
 ffff888030c1a080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888030c1a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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