loop0: detected capacity change from 0 to 32768
==================================================================
BUG: KASAN: slab-out-of-bounds in dtCompare fs/jfs/jfs_dtree.c:3345 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x13a8/0x1d00 fs/jfs/jfs_dtree.c:650
Read of size 1 at addr ffff0000fe8c5bd8 by task syz.0.113/7243

CPU: 1 UID: 0 PID: 7243 Comm: syz.0.113 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
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+0xa8/0x238 mm/kasan/report.c:378
 print_report+0x68/0x84 mm/kasan/report.c:482
 kasan_report+0xb0/0x110 mm/kasan/report.c:595
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 dtCompare fs/jfs/jfs_dtree.c:3345 [inline]
 dtSearch+0x13a8/0x1d00 fs/jfs/jfs_dtree.c:650
 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1461
 lookup_one_qstr_excl+0x10c/0x2fc fs/namei.c:1697
 filename_create+0x1cc/0x32c fs/namei.c:4140
 do_symlinkat+0xbc/0x360 fs/namei.c:4749
 __do_sys_symlinkat fs/namei.c:4772 [inline]
 __se_sys_symlinkat fs/namei.c:4769 [inline]
 __arm64_sys_symlinkat+0x9c/0xb4 fs/namei.c:4769
 __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 7243:
 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:330 [inline]
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:356
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4191 [inline]
 slab_alloc_node mm/slub.c:4240 [inline]
 kmem_cache_alloc_lru_noprof+0x23c/0x3ec mm/slub.c:4259
 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105
 alloc_inode+0x68/0x19c fs/inode.c:346
 new_inode+0x2c/0x130 fs/inode.c:1145
 ialloc+0x54/0x78c fs/jfs/jfs_inode.c:48
 jfs_create+0x170/0x8c4 fs/jfs/namei.c:92
 lookup_open fs/namei.c:3708 [inline]
 open_last_lookups fs/namei.c:3807 [inline]
 path_openat+0x12d8/0x2c40 fs/namei.c:4043
 do_filp_open+0x18c/0x36c fs/namei.c:4073
 do_sys_openat2+0x11c/0x1b4 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __arm64_sys_openat+0x120/0x158 fs/open.c:1461
 __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 ffff0000fe8c52f8
 which belongs to the cache jfs_ip of size 2232
The buggy address is located 40 bytes to the right of
 allocated 2232-byte region [ffff0000fe8c52f8, ffff0000fe8c5bb0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13e8c0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff0000f5260101
flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000040 ffff0000c491e780 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000f5260101
head: 05ffc00000000040 ffff0000c491e780 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000f5260101
head: 05ffc00000000003 fffffdffc3fa3001 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000fe8c5a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000fe8c5b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000fe8c5b80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
                                                    ^
 ffff0000fe8c5c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000fe8c5c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
ERROR: (device loop0): dtSearch: stack overrun!

ERROR: (device loop0): remounting filesystem as read-only
btstack dump:
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
jfs_lookup: dtSearch returned -5