read_mapping_page failed!
ERROR: (device loop4): txAbort: 
==================================================================
BUG: KASAN: slab-out-of-bounds in dtSplitPage+0xd00/0x27e8 fs/jfs/jfs_dtree.c:-1
Read of size 1 at addr ffff0000f665c0b5 by task syz.4.5/4463

CPU: 0 PID: 4463 Comm: syz.4.5 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
 dtSplitPage+0xd00/0x27e8 fs/jfs/jfs_dtree.c:-1
 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline]
 dtInsert+0xc0c/0x55ac fs/jfs/jfs_dtree.c:871
 jfs_mkdir+0x5a4/0x8b4 fs/jfs/namei.c:270
 vfs_mkdir+0x314/0x4d4 fs/namei.c:4114
 do_mkdirat+0x1b4/0x3e0 fs/namei.c:4139
 __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

Allocated by task 4463:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x43c mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc_lru+0x1b0/0x298 mm/slub.c:3390
 alloc_inode_sb include/linux/fs.h:3245 [inline]
 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105
 alloc_inode fs/inode.c:261 [inline]
 iget_locked+0x178/0x7c4 fs/inode.c:1373
 jfs_iget+0x30/0x374 fs/jfs/inode.c:29
 jfs_lookup+0x198/0x32c fs/jfs/namei.c:1467
 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 ffff0000f665b780
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 117 bytes to the right of
 2240-byte region [ffff0000f665b780, ffff0000f665c040)

The buggy address belongs to the physical page:
page:00000000c400f8fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x136658
head:00000000c400f8fd order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000cc8bc701
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c6fd8d80
raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000cc8bc701
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f665bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000f665c000: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff0000f665c080: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
                                     ^
 ffff0000f665c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000f665c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
find_entry called with index = 0
read_mapping_page failed!
ERROR: (device loop4): txAbort: 

ERROR: (device loop4): __get_metapage: using a discarded metapage