[PATCH 1/1] lib: sbi_ecall_base: add check for function parameter pointers

[qinhaijun at eswincomputing.com]

From: haijun qin <qinhaijun at eswincomputing.com>

When a null pointer is passed in by mistake, the program will
enter the trap, so the check for the pointer is added.

Signed-off-by: haijun qin <qinhaijun at eswincomputing.com>
---
 lib/sbi/sbi_ecall_base.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/sbi/sbi_ecall_base.c b/lib/sbi/sbi_ecall_base.c
index 786d2ac..3d4a367 100644
--- a/lib/sbi/sbi_ecall_base.c
+++ b/lib/sbi/sbi_ecall_base.c
@@ -39,6 +39,9 @@ static int sbi_ecall_base_handler(unsigned long extid, unsigned long funcid,
 {
 	int ret = 0;
 
+	if(out_val == NULL)
+		return SBI_EINVALID_ADDR;
+
 	switch (funcid) {
 	case SBI_EXT_BASE_GET_SPEC_VERSION:
 		*out_val = (SBI_ECALL_VERSION_MAJOR <<
-- 
2.17.1