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27 lines
1.1 KiB
Diff
27 lines
1.1 KiB
Diff
From: Michal Čihař <nijel@debian.org>
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Subject: Fix unalligned access to buffer.
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On several architectures (arm, armel, sparc and ia64), unalligned access to
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integers is not allowed. Buffer in this function is not alligned at all and
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attempt to read integer from it causes crash of application on such
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architectures.
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Bug: https://sourceforge.net/tracker/index.php?func=detail&aid=2149388&group_id=122858&atid=694730
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--- a/src/lib/lib.cpp
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+++ b/src/lib/lib.cpp
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@@ -496,9 +496,13 @@
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entries[i].keystr=p;
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len=strlen(p);
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p+=len+1;
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- entries[i].off=g_ntohl(*reinterpret_cast<guint32 *>(p));
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+ /*
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+ * Can not use typecasting here, because *data does not have
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+ * to be alligned and unalligned access fails on some architectures.
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+ */
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+ entries[i].off=((unsigned char)p[0] << 24) | ((unsigned char)p[1] << 16) | ((unsigned char)p[2] << 8) | (unsigned char)p[3];
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p+=sizeof(guint32);
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- entries[i].size=g_ntohl(*reinterpret_cast<guint32 *>(p));
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+ entries[i].size=((unsigned char)p[0] << 24) | ((unsigned char)p[1] << 16) | ((unsigned char)p[2] << 8) | (unsigned char)p[3];
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p+=sizeof(guint32);
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}
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}
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