From 1d90ea86a0ac6c5863597880b33a18755aff819c Mon Sep 17 00:00:00 2001 From: "Richard W.M. Jones" Date: Thu, 20 Nov 2014 21:37:19 +0000 Subject: [PATCH 04/15] lib: Don't leak errno from _hivex_recode function. If iconv returns E2BIG, that's an internal indication for us, and not an error. Don't leak the errno up to the user, as happened here: https://www.redhat.com/archives/libguestfs/2014-November/msg00140.html Thanks Nicolas Ecarnot. (cherry picked from commit 4b3c3cd2b3d8d34601979feeb1390fddd442ab04) --- lib/utf16.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/utf16.c b/lib/utf16.c index f4299f2..3b54b01 100644 --- a/lib/utf16.c +++ b/lib/utf16.c @@ -59,6 +59,10 @@ _hivex_recode (const char *input_encoding, const char *input, size_t input_len, if (r == (size_t) -1) { if (errno == E2BIG) { int err = errno; + /* Reset errno here because we don't want to accidentally + * return E2BIG to a library caller. + */ + errno = 0; size_t prev = outalloc; /* Try again with a larger output buffer. */ free (out); -- 1.8.3.1