path: root/tools
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authorMatt Fleming <matt.fleming@intel.com>2012-02-28 13:37:24 +0000
committerH. Peter Anvin <hpa@zytor.com>2012-02-28 10:23:02 -0800
commit92f42c50f227ad228f815a8f4eec872524dae3a5 (patch)
treef8fee9407ef1614ee81d27b1c4ec0efe8b41cb48 /tools
parentd40f833630a1299fd377408dc8d8fac370d621b0 (diff)
x86, efi: Fix endian issues and unaligned accesses
We may need to convert the endianness of the data we read from/write to 'buf', so let's use {get,put}_unaligned_le32() to do that. Failure to do so can result in accessing invalid memory, leading to a segfault. Stephen Rothwell noticed this bug while cross-building an x86_64 allmodconfig kernel on PowerPC. We need to read from and write to 'buf' a byte at a time otherwise it's possible we'll perform an unaligned access, which can lead to bus errors when cross-building an x86 kernel on risc architectures. Cc: H. Peter Anvin <hpa@zytor.com> Cc: Nick Bowler <nbowler@elliptictech.com> Tested-by: Stephen Rothwell <sfr@canb.auug.org.au> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Link: http://lkml.kernel.org/r/1330436245-24875-6-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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