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SUSE:SLE-12-SP2:GA
xen.2142
56bb3f45-hvmloader-fix-scratch_alloc-to-avoid-o...
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File 56bb3f45-hvmloader-fix-scratch_alloc-to-avoid-overlaps.patch of Package xen.2142
# Commit 4ab3ac074cb1f101f42e02103fa263a1f4f422b5 # Date 2016-02-10 14:46:45 +0100 # Author Anthony PERARD <anthony.perard@citrix.com> # Committer Jan Beulich <jbeulich@suse.com> hvmloader: fix scratch_alloc to avoid overlaps scratch_alloc() set scratch_start to the last byte of the current allocation. The value of scratch_start is then reused as is (if it is already aligned) in the next allocation. This result in a potential reuse of the last byte of the previous allocation. Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> --- a/tools/firmware/hvmloader/util.c +++ b/tools/firmware/hvmloader/util.c @@ -450,7 +450,7 @@ void *scratch_alloc(uint32_t size, uint3 if ( align < 16 ) align = 16; - s = (scratch_start + align - 1) & ~(align - 1); + s = (scratch_start + align) & ~(align - 1); e = s + size - 1; BUG_ON(e < s);
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