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From 4aecf8a2d3962d962da1e2f98b0bb3b84a8ae536 Mon Sep 17 00:00:00 2001
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From: Jakub Hrozek <jhrozek@redhat.com>
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Date: Thu, 23 Feb 2017 20:55:05 +0100
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Subject: [PATCH 18/36] UTIL: Add SAFEALIGN_COPY_UINT8_CHECK
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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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This macro will be used later in the KCM code
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Reviewed-by: Michal Židek <mzidek@redhat.com>
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Reviewed-by: Simo Sorce <simo@redhat.com>
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---
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src/util/util_safealign.h | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/src/util/util_safealign.h b/src/util/util_safealign.h
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index 0d9a579cdbfafc30bf2d0a6ad2651c71428ebd93..57f04a17d4a38300b959c1593d756b351ebd89e8 100644
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--- a/src/util/util_safealign.h
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+++ b/src/util/util_safealign.h
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@@ -130,6 +130,12 @@ safealign_memcpy(void *dest, const void *src, size_t n, size_t *counter)
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safealign_memcpy(dest, src, srclen, pctr); \
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} while(0)
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+#define SAFEALIGN_COPY_UINT8_CHECK(dest, src, len, pctr) do { \
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+ if ((*(pctr) + sizeof(uint8_t)) > (len) || \
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+ SIZE_T_OVERFLOW(*(pctr), sizeof(uint8_t))) { return EINVAL; } \
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+ safealign_memcpy(dest, src, sizeof(uint8_t), pctr); \
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+} while(0)
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+
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/* Aliases for backward compatibility. */
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#define SAFEALIGN_SET_VALUE SAFEALIGN_SETMEM_VALUE
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#define SAFEALIGN_SET_INT64 SAFEALIGN_SETMEM_INT64
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--
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2.9.3
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