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| author | Daniel Borkmann <daniel@iogearbox.net> | 2018-12-13 12:16:31 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-12-13 12:16:32 +0100 |
| commit | 0ad379ffd654aa4348fdffa33aada4c9de76a22e (patch) | |
| tree | da39631926f29fbb7dd194f2b87c949631f5ebe8 /kernel/bpf | |
| parent | Merge branch 'bpf-bpftool-license-update' (diff) | |
| parent | bpf: Remove !func_info and !line_info check from test_btf and bpftool (diff) | |
| download | linux-0ad379ffd654aa4348fdffa33aada4c9de76a22e.tar.xz linux-0ad379ffd654aa4348fdffa33aada4c9de76a22e.zip | |
Merge branch 'bpf-fix-kptr-checks'
Martin KaFai Lau says:
====================
This patch set removes the bpf_dump_raw_ok() guard for the func_info
and line_info during bpf_prog_get_info_by_fd().
====================
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'kernel/bpf')
| -rw-r--r-- | kernel/bpf/syscall.c | 32 |
1 files changed, 12 insertions, 20 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 70fb11106fc2..b7c585838c72 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -2272,33 +2272,25 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog, ulen = info.nr_func_info; info.nr_func_info = prog->aux->func_info_cnt; if (info.nr_func_info && ulen) { - if (bpf_dump_raw_ok()) { - char __user *user_finfo; + char __user *user_finfo; - user_finfo = u64_to_user_ptr(info.func_info); - ulen = min_t(u32, info.nr_func_info, ulen); - if (copy_to_user(user_finfo, prog->aux->func_info, - info.func_info_rec_size * ulen)) - return -EFAULT; - } else { - info.func_info = 0; - } + user_finfo = u64_to_user_ptr(info.func_info); + ulen = min_t(u32, info.nr_func_info, ulen); + if (copy_to_user(user_finfo, prog->aux->func_info, + info.func_info_rec_size * ulen)) + return -EFAULT; } ulen = info.nr_line_info; info.nr_line_info = prog->aux->nr_linfo; if (info.nr_line_info && ulen) { - if (bpf_dump_raw_ok()) { - __u8 __user *user_linfo; + __u8 __user *user_linfo; - user_linfo = u64_to_user_ptr(info.line_info); - ulen = min_t(u32, info.nr_line_info, ulen); - if (copy_to_user(user_linfo, prog->aux->linfo, - info.line_info_rec_size * ulen)) - return -EFAULT; - } else { - info.line_info = 0; - } + user_linfo = u64_to_user_ptr(info.line_info); + ulen = min_t(u32, info.nr_line_info, ulen); + if (copy_to_user(user_linfo, prog->aux->linfo, + info.line_info_rec_size * ulen)) + return -EFAULT; } ulen = info.nr_jited_line_info; |