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atomic_open(): be paranoid about may_open() return value

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It should never return positives; however, with Linux S&M crowd
involved, no bogosity is impossible.  Results would be unpleasant...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-04-27 15:47:45 -04:00
parent 0fb1ea0933
commit b3d58eaffb
1 changed files with 2 additions and 0 deletions
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2
fs/namei.c
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@ -2920,6 +2920,8 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
acc_mode = 0; acc_mode = 0;
} }
error = may_open(&file->f_path, acc_mode, open_flag); error = may_open(&file->f_path, acc_mode, open_flag);
if (WARN_ON(error > 0))
error = -EINVAL;
out: out:
dput(dentry); dput(dentry);
return error; return error;