From dd827abe296fe4249b2f8c9b95f72f814ea8348c Mon Sep 17 00:00:00 2001
From: Zizhuang Deng <sunsetdzz@gmail.com>
Date: Thu, 30 Dec 2021 15:03:31 +0800
Subject: [PATCH] lib/mpi: Add the return value check of kcalloc()
Git-commit: dd827abe296fe4249b2f8c9b95f72f814ea8348c
Patch-mainline: v5.17-rc1
References: git-fixes
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@gmail.com>
Reviewed-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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 47bc59edd4ff..54fcc01564d9 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);
--
2.31.1