ERROR: (device loop1): dtReadFirst: stbl[0] out of bound
ERROR: (device loop1): remounting filesystem as read-only
==================================================================
BUG: KASAN: slab-out-of-bounds in addressPXD fs/jfs/jfs_types.h:80 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x1560/0x1b28 fs/jfs/jfs_dtree.c:785
Read of size 4 at addr ffff0000d4d41fe0 by task syz.1.142/4895

CPU: 1 PID: 4895 Comm: syz.1.142 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0x100 mm/kasan/report.c:524
 __asan_report_load4_noabort+0x2c/0x38 mm/kasan/report_generic.c:350
 addressPXD fs/jfs/jfs_types.h:80 [inline]
 dtSearch+0x1560/0x1b28 fs/jfs/jfs_dtree.c:785
 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1459
 lookup_open fs/namei.c:3468 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0xfa4/0x2680 fs/namei.c:3788
 do_filp_open+0x174/0x344 fs/namei.c:3818
 do_sys_openat2+0x128/0x3d8 fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1347
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 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 3934:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:53
 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x43c mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x234/0x318 mm/slub.c:3383
 vm_area_dup+0x30/0x1c8 kernel/fork.c:467
 dup_mmap kernel/fork.c:646 [inline]
 dup_mm kernel/fork.c:1546 [inline]
 copy_mm+0x7fc/0x11e0 kernel/fork.c:1595
 copy_process+0x1618/0x3670 kernel/fork.c:2356
 kernel_clone+0x1d8/0x8fc kernel/fork.c:2762
 __do_sys_clone kernel/fork.c:2903 [inline]
 __se_sys_clone kernel/fork.c:2871 [inline]
 __arm64_sys_clone+0x140/0x19c kernel/fork.c:2871
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 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 ffff0000d4d41e58
 which belongs to the cache vm_area_struct of size 152
The buggy address is located 240 bytes to the right of
 152-byte region [ffff0000d4d41e58, ffff0000d4d41ef0)

The buggy address belongs to the physical page:
page:00000000379f92ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x114d41
flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000200 fffffc00036b2f00 dead000000000004 ffff0000c03db680
raw: 0000000000000000 0000000000120012 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d4d41e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc
 ffff0000d4d41f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000d4d41f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                       ^
 ffff0000d4d42000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000d4d42080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
ERROR: (device loop1): dtSearch: stack overrun!

btstack dump:
bn = 0, index = 0
bn = 20, index = 0
bn = 0, index = 0
bn = 20, index = 0
bn = 0, index = 0
bn = 20, index = 0
bn = 0, index = 0
bn = 0, index = 0
jfs_lookup: dtSearch returned -5