[COMMITTED] Fix comments in _dl_dst_count and _dl_dst_substitute.
Commit Message
DJ Delorie <dj@redhat.com> pointed out some obvious comment mistakes
in the DST changes. Thanks DJ!
---
The comments in _dl_dst_count is adjusted to match what the code does
which is count DSTs from the start of the string. With the removal of
DL_DST_COUNT we no longer accept an input that starts at the first $.
In _dl_dst_substitute we adjust the comment to indicate that both
conditions must be true for the SUID/SGID $ORIGIN exception.
---
ChangeLog | 3 +++
elf/dl-load.c | 14 ++++++++------
2 files changed, 11 insertions(+), 6 deletions(-)
@@ -1,5 +1,8 @@
2018-06-12 Carlos O'Donell <carlos@redhat.com>
+ * elf/dl-load (_dl_dst_substitute): Correct comment.
+ (_dl_dst_count): Likewise.
+
* nptl/pthread_mutex_timedlock.c (__pthread_mutex_timedlock): Call
lll_futex_timed_wait.
@@ -219,11 +219,11 @@ is_dst (const char *input, const char *ref)
return rlen;
}
-/* INPUT is the start of a DST sequence at the first '$' occurrence.
- If there is a DST we call into _dl_dst_count to count the number of
- DSTs. We count all known DSTs regardless of __libc_enable_secure;
- the caller is responsible for enforcing the security of the
- substitution rules (usually _dl_dst_substitute). */
+/* INPUT should be the start of a path e.g DT_RPATH or name e.g.
+ DT_NEEDED. The return value is the number of known DSTs found. We
+ count all known DSTs regardless of __libc_enable_secure; the caller
+ is responsible for enforcing the security of the substitution rules
+ (usually _dl_dst_substitute). */
size_t
_dl_dst_count (const char *input)
{
@@ -292,7 +292,9 @@ _dl_dst_substitute (struct link_map *l, const char *input, char *result)
* $ORIGIN appears as the first path element, and is
the only string in the path or is immediately
followed by a path separator and the rest of the
- path.
+ path,
+
+ and ...
* The path is rooted in a trusted directory.