==================================================================
BUG: KASAN: use-after-free in diWrite+0xb48/0x1604 fs/jfs/jfs_imap.c:753
Write of size 32 at addr ffff0000e4135340 by task syz.6.434/6743

CPU: 0 PID: 6743 Comm: syz.6.434 Not tainted 5.15.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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
 kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189
 memcpy+0xb4/0xe8 mm/kasan/shadow.c:66
 diWrite+0xb48/0x1604 fs/jfs/jfs_imap.c:753
 txCommit+0x754/0x55b0 fs/jfs/jfs_txnmgr.c:1255
 add_missing_indices+0x764/0xaa8 fs/jfs/jfs_dtree.c:2959
 jfs_readdir+0x1948/0x3030 fs/jfs/jfs_dtree.c:3315
 iterate_dir+0x1f4/0x4ec
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x1c4/0x4c4 fs/readdir.c:354
 __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:000000007f26f3ab refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x124135
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc0003096908 fffffc0003905d88 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e4135200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e4135280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000e4135300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                           ^
 ffff0000e4135380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e4135400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
non-latin1 character 0xffff found in JFS file name
mount with iocharset=utf8 to access
non-latin1 character 0x163 found in JFS file name
mount with iocharset=utf8 to access