[v3] mm: BPF OOM

[PATCH bpf-next v3 03/17] libbpf: fix return value on memory allocation failure

Posted by Roman Gushchin 1 week, 5 days ago

bpf_map__attach_struct_ops() returns -EINVAL instead of -ENOMEM
on the memory allocation failure. Fix it.

Fixes: 590a00888250 ("bpf: libbpf: Add STRUCT_OPS support")
Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
---
 tools/lib/bpf/libbpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 0c8bf0b5cce4..46d2762f5993 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -13480,7 +13480,7 @@ struct bpf_link *bpf_map__attach_struct_ops(const struct bpf_map *map)
 
 	link = calloc(1, sizeof(*link));
 	if (!link)
-		return libbpf_err_ptr(-EINVAL);
+		return libbpf_err_ptr(-ENOMEM);
 
 	/* kern_vdata should be prepared during the loading phase. */
 	err = bpf_map_update_elem(map->fd, &zero, map->st_ops->kern_vdata, 0);
-- 
2.52.0

Re: [PATCH bpf-next v3 03/17] libbpf: fix return value on memory allocation failure

Posted by Yafang Shao 1 week, 5 days ago

On Tue, Jan 27, 2026 at 10:53 AM Roman Gushchin
<roman.gushchin@linux.dev> wrote:
>
> bpf_map__attach_struct_ops() returns -EINVAL instead of -ENOMEM
> on the memory allocation failure. Fix it.
>
> Fixes: 590a00888250 ("bpf: libbpf: Add STRUCT_OPS support")
> Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>

Acked-by: Yafang Shao <laoar.shao@gmail.com>

> ---
>  tools/lib/bpf/libbpf.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
> index 0c8bf0b5cce4..46d2762f5993 100644
> --- a/tools/lib/bpf/libbpf.c
> +++ b/tools/lib/bpf/libbpf.c
> @@ -13480,7 +13480,7 @@ struct bpf_link *bpf_map__attach_struct_ops(const struct bpf_map *map)
>
>         link = calloc(1, sizeof(*link));
>         if (!link)
> -               return libbpf_err_ptr(-EINVAL);
> +               return libbpf_err_ptr(-ENOMEM);
>
>         /* kern_vdata should be prepared during the loading phase. */
>         err = bpf_map_update_elem(map->fd, &zero, map->st_ops->kern_vdata, 0);
> --
> 2.52.0
>
>


-- 
Regards
Yafang