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From eecfc44fbd6659ed35719038ecf2b029fe20cfd5 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
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Date: Mon, 25 Nov 2019 16:48:33 +0100
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Subject: [PATCH] Subject: [PATCH] ensure locale_name_on_entry isn't clobbered
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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If the return value of setlocale() is static storage, the call to
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setlocale(LC_NUMERIC, "C"); could overwrite it.
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If the return value of setlocale() is malloced, the call to
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setlocale(LC_NUMERIC, "C"); could free it.
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Either way, we need to copy it. Fixes gh #17054 rt134212
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Petr Písař: Ported to version-0.9924 from perl commit
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bcb1da5c29c3a2534a0e43874974b83c9c8b174c.
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Signed-off-by: Petr Písař <ppisar@redhat.com>
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---
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vutil/vutil.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/vutil/vutil.c b/vutil/vutil.c
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index 5d183a0..69c8351 100644
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--- a/vutil/vutil.c
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+++ b/vutil/vutil.c
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@@ -638,6 +638,8 @@ VER_NV:
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if ( strNE(locale_name_on_entry, "C")
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&& strNE(locale_name_on_entry, "POSIX"))
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{
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+ /* the setlocale() call might free or overwrite the name */
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+ locale_name_on_entry = savepv(locale_name_on_entry);
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setlocale(LC_NUMERIC, "C");
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}
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else { /* This value indicates to the restore code that we didn't
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@@ -661,6 +663,8 @@ VER_NV:
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if ( strNE(locale_name_on_entry, "C")
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&& strNE(locale_name_on_entry, "POSIX"))
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{
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+ /* the setlocale() call might free or overwrite the name */
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+ locale_name_on_entry = savepv(locale_name_on_entry);
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setlocale(LC_NUMERIC, "C");
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}
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else { /* This value indicates to the restore code that we
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@@ -710,6 +714,7 @@ VER_NV:
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if (locale_name_on_entry) {
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setlocale(LC_NUMERIC, locale_name_on_entry);
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+ Safefree(locale_name_on_entry);
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}
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LC_NUMERIC_UNLOCK; /* End critical section */
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@@ -718,6 +723,7 @@ VER_NV:
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if (locale_name_on_entry) {
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setlocale(LC_NUMERIC, locale_name_on_entry);
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+ Safefree(locale_name_on_entry);
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LC_NUMERIC_UNLOCK;
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}
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else if (locale_obj_on_entry == PL_underlying_numeric_obj) {
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--
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2.21.0
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