Dave Young [off-list ref] writes:

On 05/22/19 at 07:01pm, Thiago Jung Bauermann wrote:

quoted

Commit b6664ba42f14 ("s390, kexec_file: drop arch_kexec_mem_walk()")
changed kexec_add_buffer() to skip searching for a memory location if
kexec_buf.mem is already set, and use the address that is there.

In powerpc code we reuse a kexec_buf variable for loading both the kernel
and the initramfs by resetting some of the fields between those uses, but
not mem. This causes kexec_add_buffer() to try to load the kernel at the
same address where initramfs will be loaded, which is naturally rejected:

  # kexec -s -l --initrd initramfs vmlinuz
  kexec_file_load failed: Invalid argument

Setting the mem field before every call to kexec_add_buffer() fixes this
regression.

Fixes: b6664ba42f14 ("s390, kexec_file: drop arch_kexec_mem_walk()")
Signed-off-by: Thiago Jung Bauermann <redacted>
---
 arch/powerpc/kernel/kexec_elf_64.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Reviewed-by: Dave Young <redacted>

Thanks!

-- 
Thiago Jung Bauermann
IBM Linux Technology Center