* [PATCH] lib/mpi: potential dereference of null pointer
@ 2021-12-16 7:35 Jiasheng Jiang
0 siblings, 0 replies; only message in thread
From: Jiasheng Jiang @ 2021-12-16 7:35 UTC (permalink / raw)
To: jiasheng; +Cc: linux-kernel
The return value of kcalloc() needs to be checked.
To avoid dereference of null pointer in case of the failure of alloc.
Fixes: a8ea8bdd9df9 ("lib/mpi: Extend the MPI library")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
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);
--
2.25.1
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2021-12-16 7:35 [PATCH] lib/mpi: potential dereference of null pointer Jiasheng Jiang
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