ERROR: (device loop3): remounting filesystem as read-only
==================================================================
BUG: KASAN: slab-out-of-bounds in jfs_readdir+0x1484/0x37bc fs/jfs/jfs_dtree.c:2894
Read of size 1 at addr ffff0000ebc43755 by task syz.3.4/6411

CPU: 0 PID: 6411 Comm: syz.3.4 Not tainted 6.10.0-rc6-syzkaller-g8a03d70c27fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x198/0x538 mm/kasan/report.c:488
 kasan_report+0xd8/0x138 mm/kasan/report.c:601
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 jfs_readdir+0x1484/0x37bc fs/jfs/jfs_dtree.c:2894
 wrap_directory_iterator+0xa8/0xf4 fs/readdir.c:67
 shared_jfs_readdir+0x30/0x40 fs/jfs/namei.c:1540
 iterate_dir+0x4b8/0x640 fs/readdir.c:110
 __do_sys_getdents64 fs/readdir.c:409 [inline]
 __se_sys_getdents64 fs/readdir.c:394 [inline]
 __arm64_sys_getdents64+0x1c4/0x4a0 fs/readdir.c:394
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

Allocated by task 6411:
 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:565
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4002 [inline]
 kmem_cache_alloc_lru_noprof+0x1c4/0x354 mm/slub.c:4021
 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105
 alloc_inode fs/inode.c:261 [inline]
 iget_locked+0x168/0x7a8 fs/inode.c:1280
 jfs_iget+0x30/0x364 fs/jfs/inode.c:29
 jfs_fill_super+0x644/0x9f0 fs/jfs/super.c:580
 mount_bdev+0x1d4/0x2a0 fs/super.c:1659
 jfs_do_mount+0x44/0x58 fs/jfs/super.c:670
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662
 vfs_get_tree+0x90/0x288 fs/super.c:1780
 do_new_mount+0x278/0x900 fs/namespace.c:3352
 path_mount+0x590/0xe04 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3875
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

The buggy address belongs to the object at ffff0000ebc42e40
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 85 bytes to the right of
 allocated 2240-byte region [ffff0000ebc42e40, ffff0000ebc43700)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12bc40
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff0000c2ae3c01
flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 05ffc00000000040 ffff0000c3d9cb40 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000001ffffefff ffff0000c2ae3c01
head: 05ffc00000000040 ffff0000c3d9cb40 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000001ffffefff ffff0000c2ae3c01
head: 05ffc00000000003 fffffdffc3af1001 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000ebc43600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000ebc43680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000ebc43700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                 ^
 ffff0000ebc43780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000ebc43800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
ERROR: (device loop3): jfs_readdir: JFS:Dtree error: ino = 2, bn=0, index = 0

ERROR: (device loop3): __get_metapage: using a discarded metapage