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glibc/SOURCES/glibc-rh2047981-8.patch

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commit 832f50be6c9c010e46180d14126bbb81f35e808c
Author: Florian Weimer <fweimer@redhat.com>
Date: Tue Jul 6 13:22:01 2021 +0200
elf: Call free from base namespace on error in dl-libc.c [BZ #27646]
In dlerror_run, free corresponds to the local malloc in the
namespace, but GLRO (dl_catch_error) uses the malloc from the base
namespace. elf/tst-dlmopen-gethostbyname triggers this mismatch,
but it does not crash, presumably because of a fastbin deallocation.
Fixes commit c2059edce20c124d1a99f1a94cc52e83b77a917a ("elf: Use
_dl_catch_error from base namespace in dl-libc.c [BZ #27646]") and
commit b2964eb1d9a6b8ab1250e8a881cf406182da5875 ("dlfcn: Failures
after dlmopen should not terminate process [BZ #24772]").
diff --git a/elf/dl-libc.c b/elf/dl-libc.c
index 3a242d219756dac6..bb6e3378d546b234 100644
--- a/elf/dl-libc.c
+++ b/elf/dl-libc.c
@@ -48,7 +48,7 @@ dlerror_run (void (*operate) (void *), void *args)
?: last_errstring != NULL);
if (result && malloced)
- free ((char *) last_errstring);
+ GLRO (dl_error_free) ((char *) last_errstring);
return result;
}