Re: [PATCH v2 1/7] xen: use correct end address of kernel for conflict checking

[Jan Beulich]

On 20.08.2024 10:20, Juergen Gross wrote:
> When running as a Xen PV dom0 the kernel is loaded by the hypervisor
> using a different memory map than that of the host. In order to
> minimize the required changes in the kernel, the kernel adapts its
> memory map to that of the host. In order to do that it is checking
> for conflicts of its load address with the host memory map.
> 
> Unfortunately the tested memory range does not include the .brk
> area, which might result in crashes or memory corruption when this
> area does conflict withe the memory map of the host.
> 
> Fix the test by using the _end label instead of __bss_stop.
> 
> Fixes: 808fdb71936c ("xen: check for kernel memory conflicting with memory layout")
> 
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> Tested-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>