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-rw-r--r--kernel/kexec.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 474a84715ea..131b1703936 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;