This fixes a regression introduced in commit
7e740ab2e7be7d83b75513aa406e0b10875f7f9c ("libio: Fix gconv-related
memory leak [BZ #24583]").
__gconv_release_cache is only ever called with heap-allocated
arrays which contain at least one member. The statically allocated
ASCII steps are filtered out by __wcsmbs_close_conv.
+2019-07-25 Florian Weimer <fweimer@redhat.com>
+
+ [BZ #24677]
+ * iconv/gconv_cache.c (__gconv_release_cache): Check reference
+ counter before freeing array.
+
2019-07-24 H.J. Lu <hongjiu.lu@intel.com>
[BZ #24603]
void
__gconv_release_cache (struct __gconv_step *steps, size_t nsteps)
{
- if (gconv_cache != NULL)
- /* The only thing we have to deallocate is the record with the
- steps. */
+ /* The only thing we have to deallocate is the record with the
+ steps. But do not do this if the reference counter is still
+ positive. This can happen if the steps array was cloned by
+ __wcsmbs_clone_conv. (The array elements have separate __counter
+ fields, but they are only out of sync temporarily.) */
+ if (gconv_cache != NULL && steps->__counter == 0)
free (steps);
}