[PATCH 5.16 0415/1039] lib/mpi: Add the return value check of kcalloc()

[Greg Kroah-Hartman]

From: Zizhuang Deng <sunsetdzz@xxxxxxxxx>

[ Upstream commit dd827abe296fe4249b2f8c9b95f72f814ea8348c ]

Add the return value check of kcalloc() to avoid potential
NULL ptr dereference.

Fixes: a8ea8bdd9df9 ("lib/mpi: Extend the MPI library")
Signed-off-by: Zizhuang Deng <sunsetdzz@xxxxxxxxx>
Reviewed-by: Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 lib/mpi/mpi-mod.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/mpi/mpi-mod.c b/lib/mpi/mpi-mod.c
index 47bc59edd4ff9..54fcc01564d9d 100644
--- a/lib/mpi/mpi-mod.c
+++ b/lib/mpi/mpi-mod.c
@@ -40,6 +40,8 @@ mpi_barrett_t mpi_barrett_init(MPI m, int copy)
 
 	mpi_normalize(m);
 	ctx = kcalloc(1, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return NULL;
 
 	if (copy) {
 		ctx->m = mpi_copy(m);
-- 
2.34.1