powerpc: If kexec_build_elf_info() fails return immediately from elf64_load()

Uninitialized local variable "elf_info" would be passed to
kexec_free_elf_info() if kexec_build_elf_info() returns an error
in elf64_load().

If kexec_build_elf_info() returns an error, return the error
immediately.

Signed-off-by: Lakshmi Ramasubramanian <[email protected]>
Reported-by: Dan Carpenter <[email protected]>
Reviewed-by: Michael Ellerman <[email protected]>
Signed-off-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: nramas

arch/powerpc/kexec/elf_64.c

@@ -45,7 +45,7 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
 
 	ret = kexec_build_elf_info(kernel_buf, kernel_len, &ehdr, &elf_info);
 	if (ret)
-		goto out;
+		return ERR_PTR(ret);
 
 	if (image->type == KEXEC_TYPE_CRASH) {
 		/* min & max buffer values for kdump case */