From: Martin KaFai Lau Date: Fri, 29 Sep 2017 17:52:17 +0000 (-0700) Subject: bpf: Fix compiler warning on info.map_ids for 32bit platform X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=721e08dad17e226ef68819d0a23dc53c25fe8ea5;p=linux.git bpf: Fix compiler warning on info.map_ids for 32bit platform This patch uses u64_to_user_ptr() to cast info.map_ids to a userspace ptr. It also tags the user_map_ids with '__user' for sparse check. Fixes: cb4d2b3f03d8 ("bpf: Add name, load_time, uid and map_ids to bpf_prog_info") Signed-off-by: Martin KaFai Lau Acked-by: Daniel Borkmann Signed-off-by: David S. Miller --- diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 11a7f82a55d19..b927da66f653f 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -1405,7 +1405,7 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog, info.nr_map_ids = prog->aux->used_map_cnt; ulen = min_t(u32, info.nr_map_ids, ulen); if (ulen) { - u32 *user_map_ids = (u32 *)info.map_ids; + u32 __user *user_map_ids = u64_to_user_ptr(info.map_ids); u32 i; for (i = 0; i < ulen; i++)