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fs-util: extra chase_symlink() safety check on "path" parameter

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It's not clear what an empty "path" is even supposed to mean, hence
refuse.
This commit is contained in:
Lennart Poettering 2018-01-17 12:00:12 +01:00
parent b1bfb84804
commit a49424af6a
1 changed files with 3 additions and 0 deletions
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3
src/basic/fs-util.c
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@ -637,6 +637,9 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
if ((flags & (CHASE_NONEXISTENT|CHASE_OPEN)) == (CHASE_NONEXISTENT|CHASE_OPEN))
return -EINVAL;
if (isempty(path))
return -EINVAL;
/* This is a lot like canonicalize_file_name(), but takes an additional "root" parameter, that allows following
* symlinks relative to a root directory, instead of the root of the host.
*