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lib/mpi: Add the return value check of kcalloc()

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[ Upstream commit dd827abe296fe4249b2f8c9b95f72f814ea8348c ]

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

Fixes: a8ea8bdd9d ("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>
This commit is contained in:
Zizhuang Deng 2021-12-30 15:03:31 +08:00 committed by Greg Kroah-Hartman
parent e801f81cee
commit 9defd7d4c0
1 changed files with 2 additions and 0 deletions
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lib/mpi/mpi-mod.c
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@ -40,6 +40,8 @@ mpi_barrett_t mpi_barrett_init(MPI m, int copy)
mpi_normalize(m); mpi_normalize(m);
ctx = kcalloc(1, sizeof(*ctx), GFP_KERNEL); ctx = kcalloc(1, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return NULL;
if (copy) { if (copy) {
ctx->m = mpi_copy(m); ctx->m = mpi_copy(m);