+++ /dev/null
-From 8b909e3548706cbebc0a676067b81aadda57f47e Mon Sep 17 00:00:00 2001
-From: Thiago Jung Bauermann <bauerman@linux.ibm.com>
-Date: Wed, 22 May 2019 19:01:58 -0300
-Subject: powerpc/kexec: Fix loading of kernel + initramfs with kexec_file_load()
-
-From: Thiago Jung Bauermann <bauerman@linux.ibm.com>
-
-commit 8b909e3548706cbebc0a676067b81aadda57f47e upstream.
-
-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()")
-Cc: stable@vger.kernel.org # v5.0+
-Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
-Reviewed-by: Dave Young <dyoung@redhat.com>
-Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
----
- arch/powerpc/kernel/kexec_elf_64.c | 6 +++++-
- 1 file changed, 5 insertions(+), 1 deletion(-)
-
---- a/arch/powerpc/kernel/kexec_elf_64.c
-+++ b/arch/powerpc/kernel/kexec_elf_64.c
-@@ -547,6 +547,7 @@ static int elf_exec_load(struct kimage *
- kbuf.memsz = phdr->p_memsz;
- kbuf.buf_align = phdr->p_align;
- kbuf.buf_min = phdr->p_paddr + base;
-+ kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
- ret = kexec_add_buffer(&kbuf);
- if (ret)
- goto out;
-@@ -581,7 +582,8 @@ static void *elf64_load(struct kimage *i
- struct kexec_buf kbuf = { .image = image, .buf_min = 0,
- .buf_max = ppc64_rma_size };
- struct kexec_buf pbuf = { .image = image, .buf_min = 0,
-- .buf_max = ppc64_rma_size, .top_down = true };
-+ .buf_max = ppc64_rma_size, .top_down = true,
-+ .mem = KEXEC_BUF_MEM_UNKNOWN };
-
- ret = build_elf_exec_info(kernel_buf, kernel_len, &ehdr, &elf_info);
- if (ret)
-@@ -606,6 +608,7 @@ static void *elf64_load(struct kimage *i
- kbuf.bufsz = kbuf.memsz = initrd_len;
- kbuf.buf_align = PAGE_SIZE;
- kbuf.top_down = false;
-+ kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
- ret = kexec_add_buffer(&kbuf);
- if (ret)
- goto out;
-@@ -638,6 +641,7 @@ static void *elf64_load(struct kimage *i
- kbuf.bufsz = kbuf.memsz = fdt_size;
- kbuf.buf_align = PAGE_SIZE;
- kbuf.top_down = true;
-+ kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
- ret = kexec_add_buffer(&kbuf);
- if (ret)
- goto out;