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BUG: KASAN: slab-out-of-bounds in dtInsertEntry+0xdc8/0x1178 fs/jfs/jfs_dtree.c:3623
Read of size 1 at addr ffff00011d097ab0 by task syz-executor.2/16386

CPU: 1 PID: 16386 Comm: syz-executor.2 Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x174/0x514 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
 dtInsertEntry+0xdc8/0x1178 fs/jfs/jfs_dtree.c:3623
 dtInsert+0x964/0x54f4 fs/jfs/jfs_dtree.c:891
 jfs_create+0x698/0xa04 fs/jfs/namei.c:137
 lookup_open fs/namei.c:3496 [inline]
 open_last_lookups fs/namei.c:3565 [inline]
 path_openat+0xfb4/0x2830 fs/namei.c:3795
 do_filp_open+0x1bc/0x3cc fs/namei.c:3825
 do_sys_openat2+0x124/0x1b8 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_openat fs/open.c:1435 [inline]
 __se_sys_openat fs/open.c:1430 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1430
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

Allocated by task 16386:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x70/0x84 mm/kasan/generic.c:626
 unpoison_slab_object mm/kasan/common.c:314 [inline]
 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:340
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3813 [inline]
 slab_alloc_node mm/slub.c:3860 [inline]
 kmem_cache_alloc_lru+0x1e0/0x48c mm/slub.c:3879
 alloc_inode_sb include/linux/fs.h:3019 [inline]
 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105
 alloc_inode fs/inode.c:260 [inline]
 iget_locked+0x168/0x7a8 fs/inode.c:1278
 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:1663
 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:1784
 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:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

The buggy address belongs to the object at ffff00011d096f00
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 752 bytes to the right of
 allocated 2240-byte region [ffff00011d096f00, ffff00011d0977c0)

The buggy address belongs to the physical page:
page:000000004ebaa7d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff00011d090000 pfn:0x15d090
head:000000004ebaa7d4 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff0000cb12c401
ksm flags: 0x5ffc00000000840(slab|head|node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 05ffc00000000840 ffff0000c4bab8c0 fffffc00037caa00 dead000000000003
raw: ffff00011d090000 00000000800d000c 00000001ffffffff ffff0000cb12c401
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff00011d097980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff00011d097a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff00011d097a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                     ^
 ffff00011d097b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff00011d097b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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