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    Subject[PATCH 5.15 346/846] lib/mpi: Add the return value check of kcalloc()
    Date
    From: Zizhuang Deng <sunsetdzz@gmail.com>

    [ 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>
    ---
    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


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