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fs: ocfs2: check status values 

[ Upstream commit 1b13a7030504da9d379270675166342e7039817c ]

Fix CVE: CVE-2023-52590

Test return values before overwriting.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Link: https://lkml.kernel.org/r/20231009141111.149858-1-artem.chernyshev@red-soft.ru
Signed-off-by: Artem Chernyshev <artem.chernyshev@red-soft.ru>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Haisu Wang <haisuwang@tencent.com>
This commit is contained in:
Artem Chernyshev 2023-10-09 17:11:11 +03:00 committed by frankjpliu
parent fb20ce3c46
commit 4ceddcf55b
2 changed files with 12 additions and 0 deletions
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8
fs/ocfs2/namei.c
View File

@ -1597,6 +1597,10 @@ static int ocfs2_rename(struct mnt_idmap *idmap,
if (update_dot_dot) {
status = ocfs2_update_entry(old_inode, handle,
&old_inode_dot_dot_res, new_dir);
if (status < 0) {
mlog_errno(status);
goto bail;
}
drop_nlink(old_dir);
if (new_inode) {
drop_nlink(new_inode);
@ -1636,6 +1640,10 @@ static int ocfs2_rename(struct mnt_idmap *idmap,
INODE_CACHE(old_dir),
old_dir_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto bail;
}
fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
ocfs2_set_links_count(fe, old_dir->i_nlink);
ocfs2_journal_dirty(handle, old_dir_bh);

4
fs/ocfs2/quota_local.c
View File

@ -1240,6 +1240,10 @@ int ocfs2_create_local_dquot(struct dquot *dquot)
&od->dq_local_phys_blk,
&pcount,
NULL);
if (status < 0) {
mlog_errno(status);
goto out;
}
/* Initialize dquot structure on disk */
status = ocfs2_local_write_dquot(dquot);