Package: apt
Version: 0.6.44
Tags: patch
The current version of `apt' causes unaligned accesses whenever
running "apt-get update". On ia64 Linux, this typically shows up as
messages of the form:
http(22944): unaligned access to 0x60000000000062dd, ip=0x20000000000a6e01
The problem comes from transform_sha256, which assumes that the input
data is 32-bit aligned (or that misaligned access are "cheap"). The
patch below fixes the problem by open-coding the ntohl() call and
combining it with a byte-by-byte load of the 32-bit word.
--david
--- apt-0.6.44/apt-pkg/contrib/sha256.cc 2006-03-29 18:01:29.000000000
-0700
+++ apt-0.6.44-fixed/apt-pkg/contrib/sha256.cc 2006-05-15 13:49:00.000000000
-0600
@@ -61,7 +61,10 @@
static inline void LOAD_OP(int I, u32 *W, const u8 *input)
{
- W[I] = ntohl( ((u32*)(input))[I] );
+ W[I] = ( ((u32) input[I + 0] << 24)
+ | ((u32) input[I + 1] << 16)
+ | ((u32) input[I + 2] << 8)
+ | ((u32) input[I + 3]));
}
static inline void BLEND_OP(int I, u32 *W)
--
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