Blame SOURCES/0004-lib-Don-t-leak-errno-from-_hivex_recode-function.patch
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From 1d90ea86a0ac6c5863597880b33a18755aff819c Mon Sep 17 00:00:00 2001
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From: "Richard W.M. Jones" <rjones@redhat.com>
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Date: Thu, 20 Nov 2014 21:37:19 +0000
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Subject: [PATCH 04/16] lib: Don't leak errno from _hivex_recode function.
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If iconv returns E2BIG, that's an internal indication for us, and not
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an error. Don't leak the errno up to the user, as happened here:
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https://www.redhat.com/archives/libguestfs/2014-November/msg00140.html
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Thanks Nicolas Ecarnot.
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(cherry picked from commit 4b3c3cd2b3d8d34601979feeb1390fddd442ab04)
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---
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lib/utf16.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/lib/utf16.c b/lib/utf16.c
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index f4299f2..3b54b01 100644
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--- a/lib/utf16.c
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+++ b/lib/utf16.c
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@@ -59,6 +59,10 @@ _hivex_recode (const char *input_encoding, const char *input, size_t input_len,
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if (r == (size_t) -1) {
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if (errno == E2BIG) {
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int err = errno;
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+ /* Reset errno here because we don't want to accidentally
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+ * return E2BIG to a library caller.
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+ */
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+ errno = 0;
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size_t prev = outalloc;
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/* Try again with a larger output buffer. */
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free (out);
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--
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1.8.3.1
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