[libvirt] [PATCH] Fix dbus message reading code on big endian hosts

From: "Daniel P. Berrange" <berrange@redhat.com> The way we were casting small (<32bit) integers was broken on big endian hosts, causing stack smashing. This was detected in the test suite either by test failures due to incorrect results, or by libc/gcc abort'ing with its stack canary triggered. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- tests/virdbustest.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tests/virdbustest.c b/tests/virdbustest.c index fb241ee..61de937 100644 --- a/tests/virdbustest.c +++ b/tests/virdbustest.c @@ -54,8 +54,8 @@ static int testMessageSimple(const void *args ATTRIBUTE_UNUSED) int ret = -1; unsigned char in_byte = 200, out_byte = 0; int in_bool = true, out_bool = false; - int in_int16 = 12000, out_int16 = 0; - unsigned int in_uint16 = 32000, out_uint16 = 0; + short in_int16 = 0xfefe, out_int16 = 0; + unsigned short in_uint16 = 32000, out_uint16 = 0; int in_int32 = 100000000, out_int32 = 0; unsigned int in_uint32 = 200000000, out_uint32 = 0; long long in_int64 = 1000000000000, out_int64 = 0; @@ -232,8 +232,8 @@ static int testMessageStruct(const void *args ATTRIBUTE_UNUSED) int ret = -1; unsigned char in_byte = 200, out_byte = 0; int in_bool = true, out_bool = false; - int in_int16 = 12000, out_int16 = 0; - unsigned int in_uint16 = 32000, out_uint16 = 0; + short in_int16 = 12000, out_int16 = 0; + unsigned short in_uint16 = 32000, out_uint16 = 0; int in_int32 = 100000000, out_int32 = 0; unsigned int in_uint32 = 200000000, out_uint32 = 0; long long in_int64 = 1000000000000, out_int64 = 0; -- 1.8.1.4

On Mon, Jul 29, 2013 at 05:30:48PM +0100, Daniel P. Berrange wrote:
From: "Daniel P. Berrange" <berrange@redhat.com>
The way we were casting small (<32bit) integers was broken on big endian hosts, causing stack smashing. This was detected in the test suite either by test failures due to incorrect results, or by libc/gcc abort'ing with its stack canary triggered.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- tests/virdbustest.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
Opps, I missed a chunk of the patch. Ignore this & see v2 instead. Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
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Daniel P. Berrange