tree 13a78e254014c947cdeabc83cb3f1e20a0458e06
parent e18a71faae081d075c8d3ec559aa68a59295c739
author Sourabh Jain <sourabhjain@linux.ibm.com> 1770699936 +0530
committer Simon Horman <horms@kernel.org> 1771344459 +0000

ppc64: Reserve FDT memory for full elfcorehdr memory size

With --hotplug support, extra memory is added to elfcorehdr kexec
segment to accommodate additional resources during memory hotplug
events. However, the FDT is not updated with the same size, which
can lead to elfcorehdr corruption in the kdump kernel.

Fix this by updating the elfcorehdr size in the FDT memory
reservation entry to use its actual memsz instead of the current
buffer size.

Fixes: b8408c95e7c0 ("powerpc/kexec_load: add hotplug support")
Cc: Shivang Upadhyay <shivangu@linux.ibm.com>
Cc: Simon Horman <horms@kernel.org>
Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Signed-off-by: Simon Horman <horms@kernel.org>