loop1: detected capacity change from 0 to 32768
==================================================================
BUG: KASAN: slab-out-of-bounds in dtCompare fs/jfs/jfs_dtree.c:3629 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x12e4/0x1b28 fs/jfs/jfs_dtree.c:650
Read of size 1 at addr ffff0000e939c078 by task syz.1.220/5306

CPU: 1 PID: 5306 Comm: syz.1.220 Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x78/0x30c mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xec/0x15c mm/kasan/report.c:451
 __asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306
 dtCompare fs/jfs/jfs_dtree.c:3629 [inline]
 dtSearch+0x12e4/0x1b28 fs/jfs/jfs_dtree.c:650
 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1459
 lookup_open fs/namei.c:3440 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0xfbc/0x26e4 fs/namei.c:3739
 do_filp_open+0x164/0x330 fs/namei.c:3769
 do_sys_openat2+0x128/0x3d8 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1280
 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Allocated by task 0:
(stack is not available)

The buggy address belongs to the object at ffff0000e939b780
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 56 bytes to the right of
 2240-byte region [ffff0000e939b780, ffff0000e939c040)
The buggy address belongs to the page:
page:0000000020eec2f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x129398
head:0000000020eec2f8 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000c969e101
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c61e8c00
raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000c969e101
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e939bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000e939bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000e939c000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                                ^
 ffff0000e939c080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000e939c100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
ERROR: (device loop1): dtSearch: stack overrun!

ERROR: (device loop1): 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