jfs_create: dtSearch returned -17
==================================================================
BUG: KASAN: slab-out-of-bounds in dtInsertEntry+0xb0c/0xf60 fs/jfs/jfs_dtree.c:4063
Read of size 4 at addr ffff0000f2a3c04c by task syz.1.1127/8757

CPU: 1 PID: 8757 Comm: syz.1.1127 Not tainted 5.15.189-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_load4_noabort+0x44/0x50 mm/kasan/report_generic.c:308
 dtInsertEntry+0xb0c/0xf60 fs/jfs/jfs_dtree.c:4063
 dtSplitPage+0x1cb4/0x2888 fs/jfs/jfs_dtree.c:1596
 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline]
 dtInsert+0xbdc/0x55dc fs/jfs/jfs_dtree.c:871
 jfs_mkdir+0x5a4/0x8b4 fs/jfs/namei.c:270
 vfs_mkdir+0x314/0x4d4 fs/namei.c:4065
 do_mkdirat+0x1bc/0x508 fs/namei.c:4090
 __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+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 8748:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 __kasan_slab_alloc+0x8c/0xcc mm/kasan/common.c:467
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x74/0x408 mm/slab.h:519
 slab_alloc_node mm/slub.c:3220 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x1e0/0x3e4 mm/slub.c:3233
 jfs_alloc_inode+0x24/0x60 fs/jfs/super.c:105
 alloc_inode fs/inode.c:261 [inline]
 iget_locked+0x178/0x710 fs/inode.c:1308
 jfs_iget+0x30/0x374 fs/jfs/inode.c:29
 jfs_lookup+0x198/0x32c fs/jfs/namei.c:1467
 __lookup_slow+0x24c/0x380 fs/namei.c:1663
 lookup_slow+0x5c/0x80 fs/namei.c:1680
 walk_component+0x2b0/0x3a8 fs/namei.c:1976
 lookup_last fs/namei.c:2431 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2455
 filename_lookup+0x180/0x414 fs/namei.c:2484
 user_path_at_empty+0x5c/0x1a0 fs/namei.c:2883
 user_path_at include/linux/namei.h:57 [inline]
 __do_sys_chdir fs/open.c:490 [inline]
 __se_sys_chdir fs/open.c:484 [inline]
 __arm64_sys_chdir+0xb4/0x26c fs/open.c:484
 __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

The buggy address belongs to the object at ffff0000f2a3b780
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 12 bytes to the right of
 2240-byte region [ffff0000f2a3b780, ffff0000f2a3c040)
The buggy address belongs to the page:
page:00000000e81d9fbe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x132a38
head:00000000e81d9fbe order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000ea5bcb01
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c6d1ea80
raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000ea5bcb01
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f2a3bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000f2a3bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000f2a3c000: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                              ^
 ffff0000f2a3c080: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
 ffff0000f2a3c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
find_entry called with index >= next_index
read_mapping_page failed!
ERROR: (device loop1): txAbort: