From: Lorenz Bauer <lmb@cloudflare.com>
To: andrii@kernel.org, ast@kernel.org, daniel@iogearbox.net
Cc: bpf@vger.kernel.org, kernel-team@cloudflare.com,
Lorenz Bauer <lmb@cloudflare.com>
Subject: [RFC 5/9] bpf: introduce CHECK_ATTR_TAIL
Date: Thu, 14 Oct 2021 15:34:30 +0100 [thread overview]
Message-ID: <20211014143436.54470-7-lmb@cloudflare.com> (raw)
In-Reply-To: <20211014143436.54470-1-lmb@cloudflare.com>
---
kernel/bpf/syscall.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 4e50c0bfdb7d..14c2cfe6ef38 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -719,6 +719,10 @@ int bpf_get_file_flag(int flags)
offsetof(union bpf_attr, CMD##_LAST_FIELD) - \
sizeof(attr->CMD##_LAST_FIELD)) != NULL
+#define CHECK_ATTR_TAIL(attr, field) \
+ (memchr_inv((void *)(attr) + offsetofend(typeof(*attr), field), 0, \
+ sizeof(*(attr)) - offsetofend(typeof(*attr), field)) != NULL ? -EINVAL : 0)
+
/* dst and src must have at least "size" number of bytes.
* Return strlen on success and < 0 on error.
*/
--
2.30.2
next prev parent reply other threads:[~2021-10-14 14:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-14 14:34 [RFC 0/9] uapi/bpf.h for robots Lorenz Bauer
2021-10-14 14:34 ` [RFC 1/9] bpf: name enums used from userspace Lorenz Bauer
2021-10-14 14:34 ` [RFC 2/9] bpf: various constants Lorenz Bauer
2021-10-14 14:43 ` Greg KH
2021-10-14 14:47 ` Lorenz Bauer
2021-10-14 14:56 ` Greg KH
2021-10-14 14:34 ` [RFC 3/9] bpf: move up __bpf_md_ptr Lorenz Bauer
2021-10-14 14:34 ` [RFC 4/9] bpf: name __u64 member of __bpf_md_ptr Lorenz Bauer
2021-10-14 14:34 ` [RFC 5/9] bpf: enum bpf_map_create_attr Lorenz Bauer
2021-10-14 14:34 ` Lorenz Bauer [this message]
2021-10-14 14:34 ` [RFC 6/9] bpf: split map modification structs Lorenz Bauer
2021-10-20 17:13 ` Alexei Starovoitov
2021-10-14 14:34 ` [RFC 6/9] bpf: struct bpf_map_create_attr Lorenz Bauer
2021-10-14 14:34 ` [RFC 7/9] bpf: split get_id and fd_by_id in bpf_attr Lorenz Bauer
2021-10-20 17:15 ` Alexei Starovoitov
2021-10-21 15:59 ` Lorenz Bauer
2021-10-27 18:20 ` Alexei Starovoitov
2021-10-29 14:01 ` Lorenz Bauer
2021-10-14 14:34 ` [RFC 7/9] bpf: split map modification structs Lorenz Bauer
2021-10-14 14:34 ` [RFC 8/9] selftests: sync bpf.h Lorenz Bauer
2021-10-14 14:34 ` [RFC 9/9] libbpf: use new-style syscall args Lorenz Bauer
2021-10-20 17:19 ` Alexei Starovoitov
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