REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
REISERFS (device loop0): Using r5 hash to sort names
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
==================================================================
BUG: KASAN: use-after-free in memmove include/linux/string.h:391 [inline]
BUG: KASAN: use-after-free in reiserfs_release_objectid+0x41c/0x710 fs/reiserfs/objectid.c:165
Read of size 14568 at addr ffff88809fe060d0 by task syz-executor348/7985
CPU: 0 PID: 7985 Comm: syz-executor348 Not tainted 4.14.300-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
kasan_report+0x6f/0x80 mm/kasan/report.c:409
memmove+0x20/0x50 mm/kasan/kasan.c:293
memmove include/linux/string.h:391 [inline]
reiserfs_release_objectid+0x41c/0x710 fs/reiserfs/objectid.c:165
remove_save_link+0x1e2/0x380 fs/reiserfs/super.c:542
reiserfs_evict_inode+0x3e7/0x4a0 fs/reiserfs/inode.c:91
evict+0x2c8/0x700 fs/inode.c:554
iput_final fs/inode.c:1523 [inline]
iput+0x458/0x7e0 fs/inode.c:1550
dentry_unlink_inode+0x25c/0x310 fs/dcache.c:387
__dentry_kill+0x320/0x550 fs/dcache.c:591
dentry_kill fs/dcache.c:632 [inline]
dput.part.0+0x4b5/0x710 fs/dcache.c:847
dput+0x1b/0x30 fs/dcache.c:811
SYSC_renameat2 fs/namei.c:4650 [inline]
SyS_renameat2+0x96a/0xad0 fs/namei.c:4535
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
The buggy address belongs to the page:
page:ffffea00027f8180 count:2 mapcount:0 mapping:ffff8880b1d92a68 index:0x10
flags: 0xfff0000001106c(referenced|uptodate|lru|active|private|mappedtodisk)
raw: 00fff0000001106c ffff8880b1d92a68 0000000000000010 00000002ffffffff
raw: ffffea00029fe320 ffffea0002cf8c20 ffff88808cefbf18 ffff88823b3288c0
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff88823b3288c0
Memory state around the buggy address:
ffff88809fe06f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88809fe06f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88809fe07000: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fb fb
^
ffff88809fe07080: fb fb fb fb fb fb fb fb fc fc fc fc fb fb fb fb
ffff88809fe07100: fb fb fb fb fb fb fc fc fc fc fb fb fb fb fb fb
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