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BUG: KASAN: slab-out-of-bounds in ciCompare fs/jfs/jfs_dtree.c:3428 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x134c/0x1d00 fs/jfs/jfs_dtree.c:645
Read of size 1 at addr ffff0000f2d8fd74 by task syz.1.355/8848

CPU: 1 UID: 0 PID: 8848 Comm: syz.1.355 Not tainted 6.16.0-rc5-syzkaller-gec4801305969 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xa8/0x254 mm/kasan/report.c:408
 print_report+0x68/0x84 mm/kasan/report.c:521
 kasan_report+0xb0/0x110 mm/kasan/report.c:634
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 ciCompare fs/jfs/jfs_dtree.c:3428 [inline]
 dtSearch+0x134c/0x1d00 fs/jfs/jfs_dtree.c:645
 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1461
 __lookup_slow+0x254/0x378 fs/namei.c:1817
 lookup_slow+0x5c/0x80 fs/namei.c:1834
 walk_component fs/namei.c:2138 [inline]
 link_path_walk+0x790/0xc98 fs/namei.c:2506
 path_openat+0x1cc/0x2c40 fs/namei.c:4051
 do_filp_open+0x18c/0x36c fs/namei.c:4082
 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __arm64_sys_openat+0x120/0x158 fs/open.c:1463
 __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+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Allocated by task 8808:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4148 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 kmem_cache_alloc_lru_noprof+0x23c/0x3ec mm/slub.c:4216
 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105
 alloc_inode+0x68/0x19c fs/inode.c:346
 iget_locked+0x168/0x7b0 fs/inode.c:1439
 jfs_iget+0x30/0x388 fs/jfs/inode.c:29
 jfs_fill_super+0x728/0xb80 fs/jfs/super.c:547
 get_tree_bdev_flags+0x360/0x414 fs/super.c:1681
 get_tree_bdev+0x2c/0x3c fs/super.c:1704
 jfs_get_tree+0x28/0x38 fs/jfs/super.c:635
 vfs_get_tree+0x90/0x28c fs/super.c:1804
 do_new_mount+0x228/0x814 fs/namespace.c:3902
 path_mount+0x5b4/0xde0 fs/namespace.c:4226
 do_mount fs/namespace.c:4239 [inline]
 __do_sys_mount fs/namespace.c:4450 [inline]
 __se_sys_mount fs/namespace.c:4427 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4427
 __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+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

The buggy address belongs to the object at ffff0000f2d8eea0
 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 [ffff0000f2d8eea0, ffff0000f2d8f758)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x132d88
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff0000d18f0401
flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000040 ffff0000c482ca00 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000d18f0401
head: 05ffc00000000040 ffff0000c482ca00 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000d18f0401
head: 05ffc00000000003 fffffdffc3cb6201 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f2d8fc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f2d8fc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000f2d8fd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff0000f2d8fd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f2d8fe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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