==================================================================
BUG: KASAN: slab-out-of-bounds in addressPXD fs/jfs/jfs_types.h:80 [inline]
BUG: KASAN: slab-out-of-bounds in dtReadFirst+0x3f0/0xa1c fs/jfs/jfs_dtree.c:3107
Read of size 4 at addr ffff0000f277adb8 by task syz.2.120/7006

CPU: 0 UID: 0 PID: 7006 Comm: syz.2.120 Not tainted 6.13.0-rc2-syzkaller-g2e7aff49b5da #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:484 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x198/0x538 mm/kasan/report.c:489
 kasan_report+0xd8/0x138 mm/kasan/report.c:602
 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380
 addressPXD fs/jfs/jfs_types.h:80 [inline]
 dtReadFirst+0x3f0/0xa1c fs/jfs/jfs_dtree.c:3107
 jfs_readdir+0x584/0x3030 fs/jfs/jfs_dtree.c:2820
 wrap_directory_iterator+0xa8/0xf4 fs/readdir.c:65
 shared_jfs_readdir+0x30/0x40 fs/jfs/namei.c:1540
 iterate_dir+0x408/0x648 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:403 [inline]
 __se_sys_getdents64 fs/readdir.c:389 [inline]
 __arm64_sys_getdents64+0x1c0/0x490 fs/readdir.c:389
 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

The buggy address belongs to the object at ffff0000f277a4e0
 which belongs to the cache jfs_ip of size 2232
The buggy address is located 32 bytes to the right of
 allocated 2232-byte region [ffff0000f277a4e0, ffff0000f277ad98)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x132778
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff000100c29401
flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000040 ffff0000c47e9280 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000001f5000000 ffff000100c29401
head: 05ffc00000000040 ffff0000c47e9280 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000001f5000000 ffff000100c29401
head: 05ffc00000000003 fffffdffc3c9de01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f277ac80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f277ad00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000f277ad80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                        ^
 ffff0000f277ae00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f277ae80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
ERROR: (device loop2): dtReadFirst: btstack overrun

ERROR: (device loop2): 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