From 7694a7de22c53a312ea98960fcafc6ec62046531 Mon Sep 17 00:00:00 2001 From: Jiasheng Jiang Date: Fri, 31 Dec 2021 17:33:15 +0800 Subject: RDMA/uverbs: Check for null return of kmalloc_array Because of the possible failure of the allocation, data might be NULL pointer and will cause the dereference of the NULL pointer later. Therefore, it might be better to check it and return -ENOMEM. Fixes: 6884c6c4bd09 ("RDMA/verbs: Store the write/write_ex uapi entry points in the uverbs_api") Link: https://lore.kernel.org/r/20211231093315.1917667-1-jiasheng@iscas.ac.cn Signed-off-by: Jiasheng Jiang Reviewed-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/core/uverbs_uapi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/infiniband/core/uverbs_uapi.c b/drivers/infiniband/core/uverbs_uapi.c index 2f2c7646fce1..a02916a3a79c 100644 --- a/drivers/infiniband/core/uverbs_uapi.c +++ b/drivers/infiniband/core/uverbs_uapi.c @@ -447,6 +447,9 @@ static int uapi_finalize(struct uverbs_api *uapi) uapi->num_write_ex = max_write_ex + 1; data = kmalloc_array(uapi->num_write + uapi->num_write_ex, sizeof(*uapi->write_methods), GFP_KERNEL); + if (!data) + return -ENOMEM; + for (i = 0; i != uapi->num_write + uapi->num_write_ex; i++) data[i] = &uapi->notsupp_method; uapi->write_methods = data; -- cgit