==================================================================
BUG: KASAN: slab-out-of-bounds in dtCompare fs/jfs/jfs_dtree.c:3345 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x13a8/0x1d00 fs/jfs/jfs_dtree.c:650
Read of size 1 at addr ffff0000f7924030 by task syz.0.60/7167

CPU: 1 UID: 0 PID: 7167 Comm: syz.0.60 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xa8/0x238 mm/kasan/report.c:378
 print_report+0x68/0x84 mm/kasan/report.c:482
 kasan_report+0xb0/0x110 mm/kasan/report.c:595
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 dtCompare fs/jfs/jfs_dtree.c:3345 [inline]
 dtSearch+0x13a8/0x1d00 fs/jfs/jfs_dtree.c:650
 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1461
 lookup_one_qstr_excl+0x10c/0x2fc fs/namei.c:1697
 filename_create+0x1cc/0x32c fs/namei.c:4140
 do_mkdirat+0xa8/0x4c8 fs/namei.c:4391
 __do_sys_mkdirat fs/namei.c:4416 [inline]
 __se_sys_mkdirat fs/namei.c:4414 [inline]
 __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4414
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

The buggy address belongs to the object at ffff0000f7923750
 which belongs to the cache jfs_ip of size 2232
The buggy address is located 40 bytes to the right of
 allocated 2232-byte region [ffff0000f7923750, ffff0000f7924008)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x137920
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff0000f8f2ea01
flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000040 ffff0000c495b780 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000f8f2ea01
head: 05ffc00000000040 ffff0000c495b780 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000f8f2ea01
head: 05ffc00000000003 fffffdffc3de4801 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f7923f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f7923f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000f7924000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                     ^
 ffff0000f7924080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f7924100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
ERROR: (device loop0): dtSearch: stack overrun!

ERROR: (device loop0): remounting filesystem as read-only
btstack dump:
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
jfs_lookup: dtSearch returned -5
ERROR: (device loop0): dtSearch: stack overrun!

btstack dump:
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
jfs_lookup: dtSearch returned -5