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Re: [Xen-devel] xen/arm: Crash when allocating memory for ACPI table (Was Re: Design doc of adding ACPI support for arm64 on Xen - version 2)

On 2015/8/14 22:53, Julien Grall wrote:
On 14/08/15 15:49, Shannon Zhao wrote:
Ok, so it's likely a memory corruption. You need to check the bound you
ara using when copying the data to the guest or from the ACPI in
general. Or maybe you just didn't allocate enough space.

But it fails at the xzalloc_bytes itself. not at copy function.

Because the previous copy may have overwritten the metadata of the
memory allocator...

If those metadata are corrupted, xalloc_bytes we act weirdly such as
crashing Xen.

Ok, will check it. Thanks.


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