From: Florian Weimer <fweimer@redhat.com>
To: libc-alpha@sourceware.org
Subject: [PATCH] elf: Call free from base namespace on error in dl-libc.c [BZ #27646]
Date: Tue, 06 Jul 2021 13:46:55 +0200 [thread overview]
Message-ID: <87zguzfyvk.fsf@oldenburg.str.redhat.com> (raw)
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]").
---
elf/dl-libc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/elf/dl-libc.c b/elf/dl-libc.c
index a49df22029..ba792e9589 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;
}
next reply other threads:[~2021-07-06 11:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-06 11:46 Florian Weimer [this message]
2021-07-06 11:59 ` Andreas Schwab
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