==================================================================
BUG: KASAN: slab-out-of-bounds in jfs_readdir+0x15d0/0x3030 fs/jfs/jfs_dtree.c:2904
Read of size 1 at addr ffff0000fa6ec02d by task syz.3.101/7193

CPU: 0 UID: 0 PID: 7193 Comm: syz.3.101 Not tainted 6.14.0-rc1-syzkaller-g2014c95afece #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (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_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 jfs_readdir+0x15d0/0x3030 fs/jfs/jfs_dtree.c:2904
 wrap_directory_iterator+0xa8/0xf4 fs/readdir.c:65
 shared_jfs_readdir+0x30/0x40 fs/jfs/namei.c:1540
 iterate_dir+0x46c/0x5f4 fs/readdir.c:108
 get_name fs/exportfs/expfs.c:325 [inline]
 exportfs_get_name+0x470/0x578 fs/exportfs/expfs.c:36
 reconnect_one fs/exportfs/expfs.c:142 [inline]
 reconnect_path+0x214/0x69c fs/exportfs/expfs.c:222
 exportfs_decode_fh_raw+0x274/0x5a4 fs/exportfs/expfs.c:485
 do_handle_to_path+0xa0/0x198 fs/fhandle.c:257
 handle_to_path fs/fhandle.c:385 [inline]
 do_handle_open+0x880/0xb10 fs/fhandle.c:403
 __do_sys_open_by_handle_at fs/fhandle.c:443 [inline]
 __se_sys_open_by_handle_at fs/fhandle.c:434 [inline]
 __arm64_sys_open_by_handle_at+0x80/0x94 fs/fhandle.c:434
 __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

Allocated by task 7175:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:562
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_lru_noprof+0x258/0x414 mm/slub.c:4183
 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105
 alloc_inode+0x68/0x19c fs/inode.c:336
 new_inode_pseudo fs/inode.c:1174 [inline]
 new_inode+0x30/0x16c fs/inode.c:1193
 ialloc+0x58/0x78c fs/jfs/jfs_inode.c:48
 jfs_create+0x190/0xa18 fs/jfs/namei.c:92
 lookup_open fs/namei.c:3651 [inline]
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x13ec/0x2b1c fs/namei.c:3986
 do_filp_open+0x1e8/0x404 fs/namei.c:4016
 do_sys_openat2+0x124/0x1b8 fs/open.c:1427
 do_sys_open fs/open.c:1442 [inline]
 __do_sys_openat fs/open.c:1458 [inline]
 __se_sys_openat fs/open.c:1453 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1453
 __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 ffff0000fa6eb750
 which belongs to the cache jfs_ip of size 2232
The buggy address is located 37 bytes to the right of
 allocated 2232-byte region [ffff0000fa6eb750, ffff0000fa6ec008)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13a6e8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff0000f6b77b01
flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000040 ffff0000c4630280 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000f6b77b01
head: 05ffc00000000040 ffff0000c4630280 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000f6b77b01
head: 05ffc00000000003 fffffdffc3e9ba01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000fa6ebf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000fa6ebf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000fa6ec000: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                  ^
 ffff0000fa6ec080: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000fa6ec100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
ERROR: (device loop3): jfs_readdir: JFS:Dtree error: ino = 2, bn=0, index = 0

ERROR: (device loop3): remounting filesystem as read-only