[PATCH] Kexec on panic vmlinux initrd fix

This is a minor bug fix in kexec to resolve the problem of loading panic
kernel with initrd.

o Problem: Loading a capture kenrel fails if initrd is also being loaded.
  This has been observed for vmlinux image for kexec on panic case.

o This patch fixes the problem. In segment location and size verification
  logic, minor correction has been done. Segment memory end (mend) should be
  mstart + memsz - 1. This one byte offset was source of failure for initrd
  loading which was being loaded at hole boundary.

Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/kexec.c b/kernel/kexec.c
index def9c73ec9a6..a0411b3bd54a 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -264,7 +264,7 @@ static int kimage_crash_alloc(struct kimage **rimage, unsigned long entry,
         for (i = 0; i < nr_segments; i++) {
                 unsigned long mstart, mend;
                 mstart = image->segment[i].mem;
-                mend = mstart + image->segment[i].memsz;
+                mend = mstart + image->segment[i].memsz - 1;
                 /* Ensure we are within the crash kernel limits */
                 if ((mstart < crashk_res.start) || (mend > crashk_res.end))
                         goto out;