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authorKees Cook <keescook@chromium.org>2017-07-13 00:35:58 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-13 02:26:02 +0300
commite2ae8ab4b571e2e4094a28acb60649bc2732c67f (patch)
tree37ef8802e03e3e416be96534618a718833287d0e /kernel/kexec_file.c
parent3e2c044a54e6b6373606f8ffad42a4a0759fcf3d (diff)
downloadlinux-e2ae8ab4b571e2e4094a28acb60649bc2732c67f.tar.xz
kexec_file: adjust declaration of kexec_purgatory
Defining kexec_purgatory as a zero-length char array upsets compile time size checking. Since this is built on a per-arch basis, define it as an unsized char array (like is done for other similar things, e.g. linker sections). This silences the warning generated by the future CONFIG_FORTIFY_SOURCE, which did not like the memcmp() of a "0 byte" array. This drops the __weak and uses an extern instead, since both users define kexec_purgatory. Link: http://lkml.kernel.org/r/1497903987-21002-4-git-send-email-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Daniel Micay <danielmicay@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kexec_file.c')
-rw-r--r--kernel/kexec_file.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index c8f7f77e9fa9..9f48f4412297 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -26,13 +26,6 @@
#include <linux/vmalloc.h>
#include "kexec_internal.h"
-/*
- * Declare these symbols weak so that if architecture provides a purgatory,
- * these will be overridden.
- */
-char __weak kexec_purgatory[0];
-size_t __weak kexec_purgatory_size = 0;
-
static int kexec_calculate_store_digests(struct kimage *image);
/* Architectures can provide this probe function */