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bpf: Fix compiler warning on info.map_ids for 32bit platform

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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 <kafai@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Cyber Knight <cyberknight755@gmail.com>
This commit is contained in:
Martin KaFai Lau 2017-09-29 10:52:17 -07:00 committed by Richard Raya
parent 937e41cb2e
commit 55562c32df
1 changed files with 1 additions and 1 deletions
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2
kernel/bpf/syscall.c
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@ -1596,7 +1596,7 @@ 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++)