[lkcd-devel] [patch 3/4] Check KL_DUMP_HEADER in kl_dumptask

[Bernhard W. <bw...@su...>]

In kdump dumps, there's no KL_DUMP_HEADER. Check it before to prevent a crash.


Signed-off-by: Bernhard Walle <bw...@su...>

---
 lib/libklib/kl_dump.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/lib/libklib/kl_dump.c
+++ b/lib/libklib/kl_dump.c
@@ -1175,8 +1175,12 @@ kl_dumptask(void)
 {
 	if ((KL_ARCH == KL_ARCH_S390) || (KL_ARCH == KL_ARCH_S390X)) {
 		return((kaddr_t)NULL);
+	} else if (KL_DUMP_HEADER) {
+		return((kaddr_t)KL_DUMP_HEADER->current_task);
+	} else {
+		/* TODO: implement other ways to get the current task for kdump */
+		return((kaddr_t)NULL);
 	}
-	return((kaddr_t)KL_DUMP_HEADER->current_task);
 }
 
 /*

--