From: Zizhuang Deng <sunsetdzz@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: tianjia.zhang@linux.alibaba.com, Zizhuang Deng <sunsetdzz@gmail.com>
Subject: [PATCH] lib/mpi: add the return value check of kcalloc
Date: Thu, 30 Dec 2021 10:51:59 +0800 [thread overview]
Message-ID: <20211230025159.460218-1-sunsetdzz@gmail.com> (raw)
Add the return value check of kcalloc to avoid potential
NULL ptr dereference.
Signed-off-by: Zizhuang Deng <sunsetdzz@gmail.com>
---
lib/mpi/mpi-mod.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/lib/mpi/mpi-mod.c b/lib/mpi/mpi-mod.c
index 47bc59edd4ff..6fd6900f0798 100644
--- a/lib/mpi/mpi-mod.c
+++ b/lib/mpi/mpi-mod.c
@@ -41,6 +41,10 @@ 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);
ctx->m_copied = 1;
--
2.25.1
next reply other threads:[~2021-12-30 2:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-30 2:51 Zizhuang Deng [this message]
2021-12-30 6:41 ` [PATCH] lib/mpi: add the return value check of kcalloc Tianjia Zhang
2021-12-30 6:45 ` Tianjia Zhang
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