Merge branch 'master' into for-linus

1 files changed, 4 insertions, 3 deletions

diff --git a/kernel/kexec.c b/kernel/kexec.c
index 474a84715eac..131b1703936f 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1089,9 +1089,10 @@ void crash_kexec(struct pt_regs *regs)
 
 size_t crash_get_memory_size(void)
 {
-        size_t size;
+        size_t size = 0;
         mutex_lock(&kexec_mutex);
-        size = crashk_res.end - crashk_res.start + 1;
+        if (crashk_res.end != crashk_res.start)
+                size = crashk_res.end - crashk_res.start + 1;
         mutex_unlock(&kexec_mutex);
         return size;
 }
@@ -1134,7 +1135,7 @@ int crash_shrink_memory(unsigned long new_size)
 
         free_reserved_phys_range(end, crashk_res.end);
 
-        if (start == end)
+        if ((start == end) && (crashk_res.parent != NULL))
                 release_resource(&crashk_res);
         crashk_res.end = end - 1;