[PATCH bpf-next v3 2/2] bpf: Check return from set_memory_rox()
Martin KaFai Lau
martin.lau at linux.dev
Fri Mar 15 13:55:28 PDT 2024
On 3/15/24 10:06 AM, Christophe Leroy wrote:
> diff --git a/kernel/bpf/bpf_struct_ops.c b/kernel/bpf/bpf_struct_ops.c
> index 43356faaa057..ca1d9b87c475 100644
> --- a/kernel/bpf/bpf_struct_ops.c
> +++ b/kernel/bpf/bpf_struct_ops.c
> @@ -742,8 +742,11 @@ static long bpf_struct_ops_map_update_elem(struct bpf_map *map, void *key,
> if (err)
> goto reset_unlock;
> }
> - for (i = 0; i < st_map->image_pages_cnt; i++)
> - arch_protect_bpf_trampoline(st_map->image_pages[i], PAGE_SIZE);
> + for (i = 0; i < st_map->image_pages_cnt && !err; i++)
> + err = arch_protect_bpf_trampoline(st_map->image_pages[i], PAGE_SIZE);
> +
> + if (err)
> + goto reset_unlock;
This part does not look right. The "if (err)" check should be inside the for loop.
pw-bot: cr
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