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authorStanislav Fomichev <sdf@google.com>2019-07-15 18:39:53 +0200
committerDaniel Borkmann <daniel@iogearbox.net>2019-07-15 23:15:53 +0200
commitd4ecfeb15494ec261fef2d25d96eecba66f0b182 (patch)
tree88d1e6879448ca54b57b7ad17dfa3dc0753d0c3f /net
parentbpf: rename bpf_ctx_wide_store_ok to bpf_ctx_wide_access_ok (diff)
downloadlinux-d4ecfeb15494ec261fef2d25d96eecba66f0b182.tar.xz
linux-d4ecfeb15494ec261fef2d25d96eecba66f0b182.zip
bpf: allow wide aligned loads for bpf_sock_addr user_ip6 and msg_src_ip6
Add explicit check for u64 loads of user_ip6 and msg_src_ip6 and update the comment. Cc: Yonghong Song <yhs@fb.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/filter.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/net/core/filter.c b/net/core/filter.c
index c5983ddb1a9f..0f6854ccf894 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -6884,9 +6884,19 @@ static bool sock_addr_is_valid_access(int off, int size,
case bpf_ctx_range(struct bpf_sock_addr, msg_src_ip4):
case bpf_ctx_range_till(struct bpf_sock_addr, msg_src_ip6[0],
msg_src_ip6[3]):
- /* Only narrow read access allowed for now. */
if (type == BPF_READ) {
bpf_ctx_record_field_size(info, size_default);
+
+ if (bpf_ctx_wide_access_ok(off, size,
+ struct bpf_sock_addr,
+ user_ip6))
+ return true;
+
+ if (bpf_ctx_wide_access_ok(off, size,
+ struct bpf_sock_addr,
+ msg_src_ip6))
+ return true;
+
if (!bpf_ctx_narrow_access_ok(off, size, size_default))
return false;
} else {