EXT2-fs (loop4): error: ext2_valid_block_bitmap: Invalid block bitmap - block_group = 0, block = 252
EXT2-fs (loop4): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1, count = 1
==================================================================
BUG: KASAN: use-after-free in arch_test_bit include/asm-generic/bitops/non-atomic.h:118 [inline]
BUG: KASAN: use-after-free in test_bit_le include/asm-generic/bitops/le.h:85 [inline]
BUG: KASAN: use-after-free in ext2_valid_block_bitmap+0x10c/0x2e0 fs/ext2/balloc.c:88
Read of size 8 at addr ffff00010baa1ff8 by task syz-executor.4/4820

CPU: 1 PID: 4820 Comm: syz-executor.4 Not tainted 5.15.153-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309
 arch_test_bit include/asm-generic/bitops/non-atomic.h:118 [inline]
 test_bit_le include/asm-generic/bitops/le.h:85 [inline]
 ext2_valid_block_bitmap+0x10c/0x2e0 fs/ext2/balloc.c:88
 read_block_bitmap+0x294/0x340 fs/ext2/balloc.c:154
 ext2_free_blocks+0x280/0xa38 fs/ext2/balloc.c:515
 ext2_free_data fs/ext2/inode.c:1130 [inline]
 ext2_free_branches+0x38c/0x3c4 fs/ext2/inode.c:1178
 ext2_free_branches+0x180/0x3c4 fs/ext2/inode.c:1169
 __ext2_truncate_blocks+0x93c/0xd00 fs/ext2/inode.c:1244
 ext2_setsize fs/ext2/inode.c:1314 [inline]
 ext2_setattr+0x658/0x904 fs/ext2/inode.c:1692
 notify_change+0xa34/0xcf8 fs/attr.c:505
 do_truncate+0x1c0/0x28c fs/open.c:65
 handle_truncate fs/namei.c:3265 [inline]
 do_open fs/namei.c:3612 [inline]
 path_openat+0x20e8/0x26f0 fs/namei.c:3742
 do_filp_open+0x1a8/0x3b4 fs/namei.c:3769
 do_sys_openat2+0x128/0x3d8 fs/open.c:1211
 do_sys_open fs/open.c:1227 [inline]
 __do_sys_openat fs/open.c:1243 [inline]
 __se_sys_openat fs/open.c:1238 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1238
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the page:
page:000000006daaaaed refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14baa1
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc00042ea848 fffffc00042ea848 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff00010baa1e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff00010baa1f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff00010baa1f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                                ^
 ffff00010baa2000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff00010baa2080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
EXT2-fs (loop4): error: ext2_valid_block_bitmap: Invalid block bitmap - block_group = 0, block = 0
EXT2-fs (loop4): error: ext2_free_blocks: Freeing blocks in system zones - Block = 3, count = 1
EXT2-fs (loop4): error: ext2_free_blocks: Freeing blocks in system zones - Block = 2, count = 1