From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from www62.your-server.de (www62.your-server.de [213.133.104.62]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BFBF83DA5A7 for ; Tue, 15 Sep 2026 15:07:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.133.104.62 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789484874; cv=none; b=FBL7GvM4sb6Twul+YG0biqXti5TR91r3VVIw8m5PkOTN5MPXU7gmiHZbC22gJlZWM5SZ7p/x4VZL+aetCK4AkxrFTcjgew0qA0RDvIs32vG+PWfQuEvJVrsSt/7emmkbvPY1kNxgG6nt6X+SyMmaUVT7LoFG14rKTBsXqViWrF8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789484874; c=relaxed/simple; bh=nMsJNuf9XWtalCrixrvyPx5t3/GfgVCbQiBRWTTkMp8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Aon7aWOEwcRGCPdGCpTXE3kYkjOKJ4mJjX3dxMoDbpI/SOWoY8VhgT1J+NLEYZpNLOPcZ6UTkXM2DN83SX5TPSI0CbGI/47el/PpYNmZ3jEFmNe4F/f2KwFZ9O9KSZq5l/kKSzmwS0ujtACx666W8Ax/bw0OE7PRwjaRwLBiRAc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=iogearbox.net; spf=pass smtp.mailfrom=iogearbox.net; dkim=pass (2048-bit key) header.d=iogearbox.net header.i=@iogearbox.net header.b=Vg+9z78a; arc=none smtp.client-ip=213.133.104.62 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=iogearbox.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iogearbox.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=iogearbox.net header.i=@iogearbox.net header.b="Vg+9z78a" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=iogearbox.net; s=default2302; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID; bh=rYsuvLVpC9w9s4SQi4rT3invNRRiMstvKaxqXpbT0rU=; b=Vg+9z78aaY8HBwxbwqRUROxWs9 Efr9F5HSLDwN/x8kqYAX4gEERHX1lla0/VIk/B3UXD64XEdXfSURSxJt9Bce8iTJOmdrhSbjTbbhZ GFy6BSLpDWcVlluj5kEOdeqzIXUp/2BXxktBDjbbvz5DMcRZGEASX1qlNsCc8Ivif7j+tGNKYrcHD 5iDgLiQg6h/o3LUbQqfxobJgqXBzxXInUNLwUc0H/Nq4cJzl/av35MFCFBhYZ90EhKjLuUfbCpqzn JD4ff2p5lBzrKheQRM3pAMWxO8oRkjoa09+jxE66dHTA6+yNjNkr8eYRbRVS6erkPC3G4DV5JUduN TXA69YJw==; Received: from localhost ([127.0.0.1]) by www62.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.96.2) (envelope-from ) id 1x6Ul7-0007KW-0O; Tue, 15 Sep 2026 17:07:45 +0200 From: Daniel Borkmann To: alexei.starovoitov@gmail.com Cc: brauner@kernel.org, dwindsor@gmail.com, john.fastabend@gmail.com, memxor@gmail.com, kpsingh@kernel.org, matt@bobrowski.net, bpf@vger.kernel.org Subject: [PATCH bpf-next 5/8] bpf, lsm: Mark the BPF LSM hook overrides noinline Date: Tue, 15 Sep 2026 17:07:36 +0200 Message-ID: <20260915150739.284189-6-daniel@iogearbox.net> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260915150739.284189-1-daniel@iogearbox.net> References: <20260915150739.284189-1-daniel@iogearbox.net> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Virus-Scanned: Clear (ClamAV 1.4.3/28124/Tue Sep 15 08:27:28 2026) The stubs that bpf_lsm_proto.c overrides are generated as: #define LSM_HOOK(RET, DEFAULT, NAME, ...) \ __weak noinline RET bpf_lsm_##NAME(__VA_ARGS__) \ { \ return DEFAULT; \ } Mark the overrides noinline as well so they hold up the same contract as the stubs they replace. Signed-off-by: Daniel Borkmann --- kernel/bpf/bpf_lsm_proto.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/kernel/bpf/bpf_lsm_proto.c b/kernel/bpf/bpf_lsm_proto.c index 4a776df76cbb..b81179ae2e08 100644 --- a/kernel/bpf/bpf_lsm_proto.c +++ b/kernel/bpf/bpf_lsm_proto.c @@ -13,8 +13,8 @@ * explicitly enforces that BPF LSM programs check for NULL before attempting to * dereference it. */ -int bpf_lsm_mmap_file(struct file *file__nullable, unsigned long reqprot, - unsigned long prot, unsigned long flags) +noinline int bpf_lsm_mmap_file(struct file *file__nullable, unsigned long reqprot, + unsigned long prot, unsigned long flags) { return 0; } @@ -25,10 +25,10 @@ int bpf_lsm_mmap_file(struct file *file__nullable, unsigned long reqprot, * suffix marks it as PTR_MAYBE_NULL. BPF LSM programs have to check before * dereferencing them or handing them to bpf_inode_init_xattr(). */ -int bpf_lsm_inode_init_security(struct inode *inode, struct inode *dir, - const struct qstr *qstr__nullable, - struct xattr *xattrs__nullable, - int *xattr_count) +noinline int bpf_lsm_inode_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr__nullable, + struct xattr *xattrs__nullable, + int *xattr_count) { return -EOPNOTSUPP; } -- 2.43.0