loop5: detected capacity change from 0 to 32768
==================================================================
BUG: KASAN: slab-out-of-bounds in dtCompare fs/jfs/jfs_dtree.c:3333 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x12e4/0x1b28 fs/jfs/jfs_dtree.c:650
Read of size 1 at addr ffff0000f69e4058 by task syz.5.227/5492

CPU: 1 PID: 5492 Comm: syz.5.227 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 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+0xf8/0x160 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+0xa8/0x100 mm/kasan/report.c:524
 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
 dtCompare fs/jfs/jfs_dtree.c:3333 [inline]
 dtSearch+0x12e4/0x1b28 fs/jfs/jfs_dtree.c:650
 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1459
 lookup_one_qstr_excl+0x108/0x230 fs/namei.c:1613
 filename_create+0x1cc/0x39c fs/namei.c:3885
 do_mkdirat+0xa8/0x3e0 fs/namei.c:4129
 __do_sys_mkdirat fs/namei.c:4154 [inline]
 __se_sys_mkdirat fs/namei.c:4152 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 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 ffff0000f69e3780
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 24 bytes to the right of
 2240-byte region [ffff0000f69e3780, ffff0000f69e4040)

The buggy address belongs to the physical page:
page:000000006b8d84f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1369e0
head:000000006b8d84f5 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000e7fad601
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c6c51080
raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000e7fad601
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f69e3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f69e3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000f69e4000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                    ^
 ffff0000f69e4080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f69e4100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
ERROR: (device loop5): dtSearch: stack overrun!

ERROR: (device loop5): 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 loop5): 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