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ovl: fix error for ovl_fill_super() 

There are some places should return -EINVAL instead of -ENOMEM in
ovl_fill_super().

[Amir] Consistently set error before checking the error condition.

Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Chengguang Xu 2021-03-01 14:19:30 +08:00 committed by Miklos Szeredi
parent 7b279bbfd2
commit d7b49b10d5
1 changed files with 4 additions and 0 deletions
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4
fs/overlayfs/super.c
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@ -1981,6 +1981,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
if (!ofs)
goto out;
err = -ENOMEM;
ofs->creator_cred = cred = prepare_creds();
if (!cred)
goto out_err;
@ -2009,6 +2010,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
if (!splitlower)
goto out_err;
err = -EINVAL;
numlower = ovl_split_lowerdirs(splitlower);
if (numlower > OVL_MAX_STACK) {
pr_err("too many lower directories, limit is %d\n",
@ -2016,6 +2018,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
goto out_err;
}
err = -ENOMEM;
layers = kcalloc(numlower + 1, sizeof(struct ovl_layer), GFP_KERNEL);
if (!layers)
goto out_err;
@ -2042,6 +2045,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
if (ofs->config.upperdir) {
struct super_block *upper_sb;
err = -EINVAL;
if (!ofs->config.workdir) {
pr_err("missing 'workdir'\n");
goto out_err;