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BUG: KASAN: slab-out-of-bounds in ciCompare fs/jfs/jfs_dtree.c:3696 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x12c0/0x1f34 fs/jfs/jfs_dtree.c:644
Read of size 1 at addr ffff0000e8a8da14 by task syz.0.200/5246

CPU: 0 PID: 5246 Comm: syz.0.200 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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
 __asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306
 ciCompare fs/jfs/jfs_dtree.c:3696 [inline]
 dtSearch+0x12c0/0x1f34 fs/jfs/jfs_dtree.c:644
 jfs_lookup+0x164/0x39c fs/jfs/namei.c:1459
 __lookup_slow+0x250/0x388 fs/namei.c:1663
 lookup_slow+0x60/0x84 fs/namei.c:1680
 walk_component+0x394/0x4cc fs/namei.c:1976
 link_path_walk+0x5a0/0xc38
 path_parentat fs/namei.c:2502 [inline]
 __filename_parentat+0x1d4/0x5b8 fs/namei.c:2526
 filename_parentat fs/namei.c:2544 [inline]
 filename_create+0xf0/0x468 fs/namei.c:3816
 do_mkdirat+0xac/0x610 fs/namei.c:4080
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4103
 __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

Allocated by task 0:
(stack is not available)

The buggy address belongs to the object at ffff0000e8a8d340
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 1748 bytes inside of
 2240-byte region [ffff0000e8a8d340, ffff0000e8a8dc00)
The buggy address belongs to the page:
page:000000004f8e761f refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000e8a88000 pfn:0x128a88
head:000000004f8e761f order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000e97bbc01
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c6166a80
raw: ffff0000e8a88000 00000000800d000a 00000001ffffffff ffff0000e97bbc01
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e8a8d900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000e8a8d980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000e8a8da00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                         ^
 ffff0000e8a8da80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000e8a8db00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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