The last iu->buf will leak if ib_dma_mapping_error() fails.

Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
V2: new patch to address memory leaking
---
 drivers/infiniband/ulp/rtrs/rtrs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs.c b/drivers/infiniband/ulp/rtrs/rtrs.c
index 4bf9d868cc52..3696f367ff51 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs.c
@@ -37,8 +37,10 @@ struct rtrs_iu *rtrs_iu_alloc(u32 iu_num, size_t size, gfp_t gfp_mask,
 			goto err;
 
 		iu->dma_addr = ib_dma_map_single(dma_dev, iu->buf, size, dir);
-		if (ib_dma_mapping_error(dma_dev, iu->dma_addr))
+		if (ib_dma_mapping_error(dma_dev, iu->dma_addr)) {
+			kfree(iu->buf);
 			goto err;
+		}
 
 		iu->cqe.done  = done;
 		iu->size      = size;
-- 
2.29.2

On Sun, Apr 23, 2023 at 3:27 AM Li Zhijian <lizhijian@fujitsu.com> wrote:
>
> The last iu->buf will leak if ib_dma_mapping_error() fails.
>
> Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Yes, as guoqing suggested, please add the Fixes tag.
Acked-by: Jack Wang <jinpu.wang@ionos.com>
> ---
> V2: new patch to address memory leaking
> ---
>  drivers/infiniband/ulp/rtrs/rtrs.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/ulp/rtrs/rtrs.c b/drivers/infiniband/ulp/rtrs/rtrs.c
> index 4bf9d868cc52..3696f367ff51 100644
> --- a/drivers/infiniband/ulp/rtrs/rtrs.c
> +++ b/drivers/infiniband/ulp/rtrs/rtrs.c
> @@ -37,8 +37,10 @@ struct rtrs_iu *rtrs_iu_alloc(u32 iu_num, size_t size, gfp_t gfp_mask,
>                         goto err;
>
>                 iu->dma_addr = ib_dma_map_single(dma_dev, iu->buf, size, dir);
> -               if (ib_dma_mapping_error(dma_dev, iu->dma_addr))
> +               if (ib_dma_mapping_error(dma_dev, iu->dma_addr)) {
> +                       kfree(iu->buf);
>                         goto err;
> +               }
>
>                 iu->cqe.done  = done;
>                 iu->size      = size;
> --
> 2.29.2
>

On 4/23/23 09:26, Li Zhijian wrote:
> The last iu->buf will leak if ib_dma_mapping_error() fails.

Fixes: c0894b3ea69d("RDMA/rtrs: core: lib functions shared between 
client and server modules")

> Signed-off-by: Li Zhijian<lizhijian@fujitsu.com>
> ---
> V2: new patch to address memory leaking
> ---
>   drivers/infiniband/ulp/rtrs/rtrs.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/ulp/rtrs/rtrs.c b/drivers/infiniband/ulp/rtrs/rtrs.c
> index 4bf9d868cc52..3696f367ff51 100644
> --- a/drivers/infiniband/ulp/rtrs/rtrs.c
> +++ b/drivers/infiniband/ulp/rtrs/rtrs.c
> @@ -37,8 +37,10 @@ struct rtrs_iu *rtrs_iu_alloc(u32 iu_num, size_t size, gfp_t gfp_mask,
>   			goto err;
>   
>   		iu->dma_addr = ib_dma_map_single(dma_dev, iu->buf, size, dir);
> -		if (ib_dma_mapping_error(dma_dev, iu->dma_addr))
> +		if (ib_dma_mapping_error(dma_dev, iu->dma_addr)) {
> +			kfree(iu->buf);
>   			goto err;
> +		}
>   
>   		iu->cqe.done  = done;
>   		iu->size      = size;

Good catch, Acked-by: Guoqing Jiang <guoqing.jiang@linux.dev>

Thanks,
Guoqing