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authorTuo Li <islituo@gmail.com>2021-09-03 00:50:14 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-03 19:58:09 +0300
commit6c85c2c728193d19d6a908ae9fb312d0325e65ca (patch)
treec9e1a1bca9f17dee45f1db3d0442ad6d75fefc2a /fs/ocfs2
parent2f566394467c86c3c89022013a99aa2d9d4a0208 (diff)
downloadlinux-6c85c2c728193d19d6a908ae9fb312d0325e65ca.tar.xz
ocfs2: quota_local: fix possible uninitialized-variable access in ocfs2_local_read_info()
A memory block is allocated through kmalloc(), and its return value is assigned to the pointer oinfo. However, oinfo->dqi_gqinode is not initialized but it is accessed in: iput(oinfo->dqi_gqinode); To fix this possible uninitialized-variable access, assign NULL to oinfo->dqi_gqinode, and add ocfs2_qinfo_lock_res_init() behind the assignment in ocfs2_local_read_info(). Remove ocfs2_qinfo_lock_res_init() in ocfs2_global_read_info(). Link: https://lkml.kernel.org/r/20210804031832.57154-1-islituo@gmail.com Signed-off-by: Tuo Li <islituo@gmail.com> Reported-by: TOTE Robot <oslab@tsinghua.edu.cn> 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: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/quota_global.c1
-rw-r--r--fs/ocfs2/quota_local.c2
2 files changed, 2 insertions, 1 deletions
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index eda83487c9ec..f033de733adb 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -357,7 +357,6 @@ int ocfs2_global_read_info(struct super_block *sb, int type)
}
oinfo->dqi_gi.dqi_sb = sb;
oinfo->dqi_gi.dqi_type = type;
- ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
oinfo->dqi_gqi_bh = NULL;
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index b1a8b046f4c2..0e4b16d4c037 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -702,6 +702,8 @@ static int ocfs2_local_read_info(struct super_block *sb, int type)
info->dqi_priv = oinfo;
oinfo->dqi_type = type;
INIT_LIST_HEAD(&oinfo->dqi_chunk);
+ oinfo->dqi_gqinode = NULL;
+ ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
oinfo->dqi_rec = NULL;
oinfo->dqi_lqi_bh = NULL;
oinfo->dqi_libh = NULL;