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BUG: KASAN: slab-out-of-bounds in ciCompare fs/jfs/jfs_dtree.c:3398 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x12c0/0x1f34 fs/jfs/jfs_dtree.c:644
Read of size 1 at addr ffff0000e0ddb734 by task syz.3.165/5100

CPU: 1 PID: 5100 Comm: syz.3.165 Not tainted 6.1.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x174/0x4c0 mm/kasan/report.c:395
 kasan_report+0xd4/0x130 mm/kasan/report.c:495
 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
 ciCompare fs/jfs/jfs_dtree.c:3398 [inline]
 dtSearch+0x12c0/0x1f34 fs/jfs/jfs_dtree.c:644
 jfs_lookup+0x164/0x39c fs/jfs/namei.c:1459
 lookup_one_qstr_excl+0x108/0x230 fs/namei.c:1605
 filename_create+0x230/0x468 fs/namei.c:3879
 do_mkdirat+0xac/0x510 fs/namei.c:4123
 __do_sys_mkdirat fs/namei.c:4148 [inline]
 __se_sys_mkdirat fs/namei.c:4146 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4146
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 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 5100:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x458 mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc_lru+0x1ac/0x2f8 mm/slub.c:3429
 alloc_inode_sb include/linux/fs.h:3193 [inline]
 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105
 alloc_inode fs/inode.c:261 [inline]
 iget_locked+0x170/0x708 fs/inode.c:1330
 jfs_iget+0x30/0x364 fs/jfs/inode.c:29
 jfs_fill_super+0x644/0x9f0 fs/jfs/super.c:580
 mount_bdev+0x274/0x370 fs/super.c:1443
 jfs_do_mount+0x44/0x58 fs/jfs/super.c:670
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
 vfs_get_tree+0x90/0x274 fs/super.c:1573
 do_new_mount+0x278/0x8fc fs/namespace.c:3051
 path_mount+0x590/0xe5c fs/namespace.c:3381
 do_mount fs/namespace.c:3394 [inline]
 __do_sys_mount fs/namespace.c:3602 [inline]
 __se_sys_mount fs/namespace.c:3579 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3579
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 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 ffff0000e0ddae40
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 52 bytes to the right of
 2240-byte region [ffff0000e0ddae40, ffff0000e0ddb700)

The buggy address belongs to the physical page:
page:00000000fa8af4c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x120dd8
head:00000000fa8af4c1 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000d2c03601
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c7490f00
raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000d2c03601
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e0ddb600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e0ddb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000e0ddb700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                     ^
 ffff0000e0ddb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e0ddb800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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