diff mbox series

[bpf-next,v4,1/3] bpf, net: validate struct_ops when updating value.

Message ID 20240224223418.526631-2-thinker.li@gmail.com (mailing list archive)
State Accepted
Commit 73e4f9e615d7b99f39663d4722dc73e8fa5db5f9
Delegated to: BPF
Headers show
Series Allow struct_ops maps with a large number of programs | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1053 this patch: 1053
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 12 maintainers not CCed: pabeni@redhat.com jolsa@kernel.org daniel@iogearbox.net john.fastabend@gmail.com edumazet@google.com yonghong.song@linux.dev sdf@google.com dsahern@kernel.org kuba@kernel.org eddyz87@gmail.com kpsingh@kernel.org haoluo@google.com
netdev/build_clang success Errors and warnings before: 1066 this patch: 1066
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1070 this patch: 1070
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 31 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
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Commit Message

Kui-Feng Lee Feb. 24, 2024, 10:34 p.m. UTC 
Perform all validations when updating values of struct_ops maps. Doing
validation in st_ops->reg() and st_ops->update() is not necessary anymore.
However, tcp_register_congestion_control() has been called in various
places. It still needs to do validations.

Cc: netdev@vger.kernel.org
Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
---
 kernel/bpf/bpf_struct_ops.c | 11 ++++++-----
 net/ipv4/tcp_cong.c         |  6 +-----
 2 files changed, 7 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/kernel/bpf/bpf_struct_ops.c b/kernel/bpf/bpf_struct_ops.c
index a6019087b467..07e554c191d1 100644
--- a/kernel/bpf/bpf_struct_ops.c
+++ b/kernel/bpf/bpf_struct_ops.c
@@ -672,13 +672,14 @@  static long bpf_struct_ops_map_update_elem(struct bpf_map *map, void *key,
 		*(unsigned long *)(udata + moff) = prog->aux->id;
 	}
 
+	if (st_ops->validate) {
+		err = st_ops->validate(kdata);
+		if (err)
+			goto reset_unlock;
+	}
+
 	if (st_map->map.map_flags & BPF_F_LINK) {
 		err = 0;
-		if (st_ops->validate) {
-			err = st_ops->validate(kdata);
-			if (err)
-				goto reset_unlock;
-		}
 		arch_protect_bpf_trampoline(st_map->image, PAGE_SIZE);
 		/* Let bpf_link handle registration & unregistration.
 		 *
diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c
index 1b34050a7538..28ffcfbeef14 100644
--- a/net/ipv4/tcp_cong.c
+++ b/net/ipv4/tcp_cong.c
@@ -146,11 +146,7 @@  EXPORT_SYMBOL_GPL(tcp_unregister_congestion_control);
 int tcp_update_congestion_control(struct tcp_congestion_ops *ca, struct tcp_congestion_ops *old_ca)
 {
 	struct tcp_congestion_ops *existing;
-	int ret;
-
-	ret = tcp_validate_congestion_control(ca);
-	if (ret)
-		return ret;
+	int ret = 0;
 
 	ca->key = jhash(ca->name, sizeof(ca->name), strlen(ca->name));