linux-kernel - [PATCH perf/core 04/11] bpf: Add support to attach uprobe

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250902143504.1224726-5-jolsa@kernel.org>
Date: Tue,  2 Sep 2025 16:34:57 +0200
From: Jiri Olsa <jolsa@...nel.org>
To: Oleg Nesterov <oleg@...hat.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrii Nakryiko <andrii@...nel.org>
Cc: bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	x86@...nel.org,
	Song Liu <songliubraving@...com>,
	Yonghong Song <yhs@...com>,
	John Fastabend <john.fastabend@...il.com>,
	Hao Luo <haoluo@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: [PATCH perf/core 04/11] bpf: Add support to attach uprobe_multi unique uprobe

Adding support to attach unique uprobe through uprobe multi link
interface.

Adding new BPF_F_UPROBE_MULTI_UNIQUE flag that denotes the unique
uprobe creation.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 include/uapi/linux/bpf.h       | 3 ++-
 kernel/trace/bpf_trace.c       | 4 +++-
 tools/include/uapi/linux/bpf.h | 3 ++-
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 233de8677382..3de9eb469fe2 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -1300,7 +1300,8 @@ enum {
  * BPF_TRACE_UPROBE_MULTI attach type to create return probe.
  */
 enum {
-	BPF_F_UPROBE_MULTI_RETURN = (1U << 0)
+	BPF_F_UPROBE_MULTI_RETURN = (1U << 0),
+	BPF_F_UPROBE_MULTI_UNIQUE = (1U << 1),
 };
 
 /* link_create.netfilter.flags used in LINK_CREATE command for
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 3ae52978cae6..0674d5ac7b55 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -3349,7 +3349,7 @@ int bpf_uprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *pr
 		return -EINVAL;
 
 	flags = attr->link_create.uprobe_multi.flags;
-	if (flags & ~BPF_F_UPROBE_MULTI_RETURN)
+	if (flags & ~(BPF_F_UPROBE_MULTI_RETURN|BPF_F_UPROBE_MULTI_UNIQUE))
 		return -EINVAL;
 
 	/*
@@ -3423,6 +3423,8 @@ int bpf_uprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *pr
 
 		uprobes[i].link = link;
 
+		if (flags & BPF_F_UPROBE_MULTI_UNIQUE)
+			uprobes[i].consumer.is_unique = true;
 		if (!(flags & BPF_F_UPROBE_MULTI_RETURN))
 			uprobes[i].consumer.handler = uprobe_multi_link_handler;
 		if (flags & BPF_F_UPROBE_MULTI_RETURN || is_uprobe_session(prog))
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 233de8677382..3de9eb469fe2 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -1300,7 +1300,8 @@ enum {
  * BPF_TRACE_UPROBE_MULTI attach type to create return probe.
  */
 enum {
-	BPF_F_UPROBE_MULTI_RETURN = (1U << 0)
+	BPF_F_UPROBE_MULTI_RETURN = (1U << 0),
+	BPF_F_UPROBE_MULTI_UNIQUE = (1U << 1),
 };
 
 /* link_create.netfilter.flags used in LINK_CREATE command for
-- 
2.51.0