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40 lines
1.4 KiB
Diff
40 lines
1.4 KiB
Diff
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From 44d9e85ef058fbb9981d53218cafdc451afa5535 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz@true.cz>
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Date: Wed, 25 Dec 2019 10:27:59 +0100
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Subject: blobmsg: fix array out of bounds GCC 10 warning
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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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Fixes following warning reported by GCC 10.0.0 20191203:
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blobmsg.c:234:2: error: 'strcpy' offset 6 from the object at 'attr' is out of the bounds of referenced subobject 'name' with type 'uint8_t[0]' {aka 'unsigned char[0]'} at offset 6 [-Werror=array-bounds]
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234 | strcpy((char *) hdr->name, (const char *)name);
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| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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In file included from blobmsg.c:16:
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blobmsg.h:42:10: note: subobject 'name' declared here
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42 | uint8_t name[];
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| ^~~~
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Reported-by: Khem Raj <raj.khem@gmail.com>
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Signed-off-by: Petr Štetiar <ynezz@true.cz>
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---
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blobmsg.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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--- a/blobmsg.c
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+++ b/blobmsg.c
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@@ -246,7 +246,10 @@ blobmsg_new(struct blob_buf *buf, int ty
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attr->id_len |= be32_to_cpu(BLOB_ATTR_EXTENDED);
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hdr = blob_data(attr);
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hdr->namelen = cpu_to_be16(namelen);
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- strcpy((char *) hdr->name, (const char *)name);
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+
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+ memcpy(hdr->name, name, namelen);
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+ hdr->name[namelen] = '\0';
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+
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pad_end = *data = blobmsg_data(attr);
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pad_start = (char *) &hdr->name[namelen];
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if (pad_start < pad_end)
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