==================================================================
BUG: KASAN: slab-out-of-bounds in diWrite+0x928/0x11e4 fs/jfs/jfs_imap.c:753
Read of size 32 at addr ffff0000f5daa570 by task syz.1.14/4478

CPU: 0 PID: 4478 Comm: syz.1.14 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 dump_backtrace+0x1c0/0x1ec arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0xfc mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x258/0x290 mm/kasan/generic.c:189
 memcpy+0x48/0x90 mm/kasan/shadow.c:65
 diWrite+0x928/0x11e4 fs/jfs/jfs_imap.c:753
 txCommit+0x5e0/0x3bf8 fs/jfs/jfs_txnmgr.c:1256
 add_missing_indices+0x6e0/0x9f4 fs/jfs/jfs_dtree.c:2664
 jfs_readdir+0x184c/0x3114 fs/jfs/jfs_dtree.c:3020
 iterate_dir+0x1f0/0x4cc fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x11c/0x320 fs/readdir.c:354
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the object at ffff0000f5daa500
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 112 bytes inside of
 2240-byte region [ffff0000f5daa500, ffff0000f5daadc0)

The buggy address belongs to the physical page:
page:00000000d248c475 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x135da8
head:00000000d248c475 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000c3487f01
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c4dc8600
raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000c3487f01
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f5daa400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000f5daa480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000f5daa500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff0000f5daa580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f5daa600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

 ... Log Wrap ... Log Wrap ... Log Wrap ...


 ... Log Wrap ... Log Wrap ... Log Wrap ...


 ... Log Wrap ... Log Wrap ... Log Wrap ...

ERROR: (device loop1): jfs_readdir: JFS:Dtree error: ino = 2, bn=0, index = 0

ERROR: (device loop1): remounting filesystem as read-only
JFS: Invalid stbl[1] = -128 for inode 2, block = 0