From: Zizhuang Deng sunsetdzz@gmail.com
stable inclusion from stable-v5.10.94 commit 9defd7d4c084091f8186361574fe6415cb13bbed bugzilla: https://gitee.com/openeuler/kernel/issues/I531X9
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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@gmail.com Reviewed-by: Tianjia Zhang tianjia.zhang@linux.alibaba.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com --- 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);