diff options
| author |   Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2021-12-31 17:33:15 +0800 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2022-01-05 14:16:53 -0400 |
| commit | 7694a7de22c53a312ea98960fcafc6ec62046531 (patch) | |
| tree | c87578d9438dc2b1f653ac90ec6e0927f49f7c9c /drivers/infiniband/core/uverbs_uapi.c | |
| parent | Revert "RDMA/mlx5: Fix releasing unallocated memory in dereg MR flow" (diff) | |
| download | linux-dev-7694a7de22c53a312ea98960fcafc6ec62046531.tar.xz linux-dev-7694a7de22c53a312ea98960fcafc6ec62046531.zip | |
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 <jiasheng@iscas.ac.cn>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/core/uverbs_uapi.c')
| -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 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; |