diff options
| author | Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2021-12-31 17:33:15 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-11 15:23:31 +0100 |
| commit | 7646a340b25bb68cfb6d2e087a608802346d0f7b (patch) | |
| tree | e74a355d647cd112dabcde8f09c717b938a3c815 /drivers/infiniband | |
| parent | 5eb5d9c6591d7e58f32088ef848503a4a947fc46 (diff) | |
RDMA/uverbs: Check for null return of kmalloc_array
commit 7694a7de22c53a312ea98960fcafc6ec62046531 upstream.
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 <jiasheng@iscas.ac.cn>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/uverbs_uapi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_uapi.c b/drivers/infiniband/core/uverbs_uapi.c index 00c547887132..818699b855c5 100644 --- a/drivers/infiniband/core/uverbs_uapi.c +++ b/drivers/infiniband/core/uverbs_uapi.c @@ -450,6 +450,9 @@ 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; |