REISERFS warning: green-16003 errcatch_is_left_mergeable: Invalid item type observed, run fsck ASAP
REISERFS warning: green-16003 errcatch_is_left_mergeable: Invalid item type observed, run fsck ASAP
==================================================================
BUG: KASAN: slab-use-after-free in reiserfs_release_objectid+0x454/0x63c fs/reiserfs/objectid.c:165
Read of size 8188 at addr ffff0000c47db050 by task syz.3.102/7978

CPU: 0 UID: 0 PID: 7978 Comm: syz.3.102 Not tainted 6.11.0-rc3-syzkaller-00156-gd7a5aa4b3c00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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:93 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x178/0x518 mm/kasan/report.c:488
 kasan_report+0xd8/0x138 mm/kasan/report.c:601
 kasan_check_range+0x254/0x294 mm/kasan/generic.c:189
 __asan_memmove+0x3c/0x84 mm/kasan/shadow.c:94
 reiserfs_release_objectid+0x454/0x63c fs/reiserfs/objectid.c:165
 remove_save_link+0x2a0/0x460 fs/reiserfs/super.c:542
 reiserfs_evict_inode+0x300/0x3ec fs/reiserfs/inode.c:91
 evict+0x418/0x894 fs/inode.c:704
 iput_final fs/inode.c:1838 [inline]
 iput+0x74c/0x830 fs/inode.c:1864
 dentry_unlink_inode+0x3a0/0x4e0 fs/dcache.c:407
 __dentry_kill+0x178/0x5e8 fs/dcache.c:610
 dput+0x1b8/0x290 fs/dcache.c:852
 ovl_check_rename_whiteout fs/overlayfs/super.c:592 [inline]
 ovl_make_workdir fs/overlayfs/super.c:691 [inline]
 ovl_get_workdir+0xa0c/0x142c fs/overlayfs/super.c:814
 ovl_fill_super+0x1004/0x2e40 fs/overlayfs/super.c:1382
 vfs_get_super fs/super.c:1280 [inline]
 get_tree_nodev+0xb4/0x144 fs/super.c:1299
 ovl_get_tree+0x28/0x38 fs/overlayfs/params.c:637
 vfs_get_tree+0x90/0x288 fs/super.c:1800
 do_new_mount+0x278/0x900 fs/namespace.c:3472
 path_mount+0x590/0xe04 fs/namespace.c:3799
 do_mount fs/namespace.c:3812 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount fs/namespace.c:3997 [inline]
 __arm64_sys_mount+0x45c/0x5a8 fs/namespace.c:3997
 __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+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 physical page:
page: refcount:2 mapcount:0 mapping:0000000070e6c2d2 index:0x10 pfn:0x1047db
memcg:ffff0000c092c000
aops:def_blk_aops ino:700003 dentry name:""
flags: 0x5ffc0000001412c(referenced|uptodate|lru|active|private|mappedtodisk|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc0000001412c fffffdffc35aea88 fffffdffc39557c8 ffff0000c054e488
raw: 0000000000000010 ffff0000d9ee2e80 00000002ffffffff ffff0000c092c000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000c47dbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000c47dbf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000c47dc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff0000c47dc080: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb
 ffff0000c47dc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
overlayfs: upper fs does not support RENAME_WHITEOUT.
overlayfs: failed to set xattr on upper
overlayfs: ...falling back to redirect_dir=nofollow.
overlayfs: ...falling back to index=off.
overlayfs: ...falling back to uuid=null.