30 lines
1001 B
Diff
30 lines
1001 B
Diff
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From 03ea6915c99b9ca0d8ac576e4cfd1c2eca62338c Mon Sep 17 00:00:00 2001
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From: Martin Liska <mliska@suse.cz>
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Date: Mon, 11 Apr 2022 09:14:28 +0200
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Subject: [PATCH] Fix buffer overflow detected with -D_FORTIFY_SOURCE=3.
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Correctly set maximum buffer length for snprintf call.
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Fixes: #5.
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---
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src/sratom.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/src/sratom.c b/src/sratom.c
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index 692257d..b6ba7ed 100644
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--- a/src/sratom.c
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+++ b/src/sratom.c
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@@ -334,10 +334,11 @@ sratom_write(Sratom* sratom,
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new_node = true;
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datatype = serd_node_from_string(SERD_URI, USTR(LV2_MIDI__MidiEvent));
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- uint8_t* str = (uint8_t*)calloc(size * 2 + 1, 1);
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+ size_t strlen = size * 2 + 1;
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+ uint8_t* str = (uint8_t*)calloc(strlen, 1);
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for (uint32_t i = 0; i < size; ++i) {
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snprintf((char*)str + (2 * i),
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- size * 2 + 1,
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+ strlen - (2 * i),
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"%02X",
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(unsigned)*((const uint8_t*)body + i));
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}
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