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BUG: KASAN: slab-out-of-bounds in ciCompare fs/jfs/jfs_dtree.c:3416 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x12e0/0x1f88 fs/jfs/jfs_dtree.c:645
Read of size 1 at addr ffff0000dd4bfd74 by task syz.4.237/7534

CPU: 0 UID: 0 PID: 7534 Comm: syz.4.237 Not tainted 6.15.0-rc2-syzkaller-gc72692105976 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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:408 [inline]
 print_report+0x198/0x550 mm/kasan/report.c:521
 kasan_report+0xd8/0x138 mm/kasan/report.c:634
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 ciCompare fs/jfs/jfs_dtree.c:3416 [inline]
 dtSearch+0x12e0/0x1f88 fs/jfs/jfs_dtree.c:645
 jfs_lookup+0x164/0x39c fs/jfs/namei.c:1461
 __lookup_slow+0x258/0x37c fs/namei.c:1807
 lookup_slow+0x60/0x84 fs/namei.c:1824
 walk_component+0x280/0x36c fs/namei.c:2128
 lookup_last fs/namei.c:2626 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2650
 filename_lookup+0x204/0x51c fs/namei.c:2679
 user_path_at+0x50/0x74 fs/namei.c:3085
 do_mount fs/namespace.c:4216 [inline]
 __do_sys_mount fs/namespace.c:4430 [inline]
 __se_sys_mount fs/namespace.c:4407 [inline]
 __arm64_sys_mount+0x4bc/0x5d0 fs/namespace.c:4407
 __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 7534:
 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:4151 [inline]
 slab_alloc_node mm/slub.c:4200 [inline]
 kmem_cache_alloc_lru_noprof+0x258/0x414 mm/slub.c:4219
 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105
 alloc_inode+0x68/0x19c fs/inode.c:346
 iget_locked+0x184/0x7ec fs/inode.c:1439
 jfs_iget+0x30/0x378 fs/jfs/inode.c:29
 jfs_fill_super+0x748/0xba0 fs/jfs/super.c:547
 get_tree_bdev_flags+0x38c/0x494 fs/super.c:1636
 get_tree_bdev+0x2c/0x3c fs/super.c:1659
 jfs_get_tree+0x28/0x38 fs/jfs/super.c:635
 vfs_get_tree+0x90/0x28c fs/super.c:1759
 do_new_mount+0x278/0x900 fs/namespace.c:3879
 path_mount+0x590/0xe04 fs/namespace.c:4206
 do_mount fs/namespace.c:4219 [inline]
 __do_sys_mount fs/namespace.c:4430 [inline]
 __se_sys_mount fs/namespace.c:4407 [inline]
 __arm64_sys_mount+0x4f4/0x5d0 fs/namespace.c:4407
 __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 ffff0000dd4beea0
 which belongs to the cache jfs_ip of size 2232
The buggy address is located 1564 bytes to the right of
 allocated 2232-byte region [ffff0000dd4beea0, ffff0000dd4bf758)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11d4b8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff0000d0851101
flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000040 ffff0000c4c80140 dead000000000122 0000000000000000
raw: 0000000000000000 00000000000d000d 00000000f5000000 ffff0000d0851101
head: 05ffc00000000040 ffff0000c4c80140 dead000000000122 0000000000000000
head: 0000000000000000 00000000000d000d 00000000f5000000 ffff0000d0851101
head: 05ffc00000000003 fffffdffc3752e01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000dd4bfc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000dd4bfc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000dd4bfd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff0000dd4bfd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000dd4bfe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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