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elf: Call free from base namespace on error in dl-libc.c [BZ #27646]

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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 c2059edce2 ("elf: Use
_dl_catch_error from base namespace in dl-libc.c [BZ #27646]") and
commit b2964eb1d9 ("dlfcn: Failures
after dlmopen should not terminate process [BZ #24772]").
This commit is contained in:
Florian Weimer 2021-07-06 13:22:01 +02:00
parent c8935581de
commit 832f50be6c
1 changed files with 1 additions and 1 deletions
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elf/dl-libc.c
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@ -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;
}