Commit c90e09f7 authored by Jaegeuk Kim's avatar Jaegeuk Kim

f2fs crypto: fix corrupted symlink in encrypted case

In the encrypted symlink case, we should check its corrupted symname after
decrypting it.
Otherwise, we can report -ENOENT incorrectly, if encrypted symname starts with
'\0'.

Cc: stable 4.5+ <stable@vger.kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent fd694733
......@@ -1027,12 +1027,6 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry,
goto errout;
}
/* this is broken symlink case */
if (unlikely(cstr.name[0] == 0)) {
res = -ENOENT;
goto errout;
}
if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) {
/* Symlink data on the disk is corrupted */
res = -EIO;
......@@ -1046,6 +1040,12 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry,
if (res < 0)
goto errout;
/* this is broken symlink case */
if (unlikely(pstr.name[0] == 0)) {
res = -ENOENT;
goto errout;
}
paddr = pstr.name;
/* Null-terminate the name */
......
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