[PATCH] kexec-tools/x86: get_kernel_vaddr_and_size off-by-one fix

Simon Horman horms at verge.net.au
Thu Dec 8 02:04:44 PST 2016

On Thu, Dec 08, 2016 at 10:52:22AM +0800, Dave Young wrote:
> I got below error while tesing kexec -p:
> "Can't find kernel text map area from kcore"
> The case is the pt_load start addr was same as stext_sym. The checking
> code should really be saddr <= stext_sym so that the right pt_load area
> includes stext_sym can be matched.
> This was not reported by people previously because it will fail over to
> use hardcode X86_64__START_KERNEL_map to match the pt_load areas again
> in later code and it sometimes succeeds because of kernel address
> randomization.
> With this change according to my test stext_sym checking can garantee
> falling into right pt_load area if we get correct stext_sym.
> Signed-off-by: Dave Young <dyoung at redhat.com>

Thanks, applied.

More information about the kexec mailing list