From nobody Sat Apr 4 01:50:13 2026 Received: from out162-62-58-216.mail.qq.com (out162-62-58-216.mail.qq.com [162.62.58.216]) (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 9B97436DA00; Sat, 21 Mar 2026 06:08:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=162.62.58.216 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774073301; cv=none; b=dZSQl+6SD9vau7UlgJMEsWDo0bPW7TmsvGxdjruJjX4vDN+JqdDWbIwx8zfOKFOC3b+X6GQnhYkYI4OB8t26+MJerHZxmUr9QaLjB4oKIb2KnSHeG+JghuFUHhY0Kb1cHDpampjFeW0JahatSJSYxKBQ8/Ud1eHk6dyTOQUPUgM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774073301; c=relaxed/simple; bh=pgIlPL14lAnVW+YSZJDMXBIFV0kir0ycWCGLJWO77CE=; h=Message-ID:From:To:Cc:Subject:Date:MIME-Version; b=HGvHUTP/ZS2ovdPIfh2aCfOFnB5jjEjbsPrV+gQnW5anJL9i0w4ra+r6ZGTR0jU9dgJwWj1oG13b5B8FCjDhxVnLycnjovhWk4ZKZmmIivs6nqODNflLbFGJpoUECqHAz2BhSZ3ex4WWRMrsFTyp6yKntjpEzMPWIhrbolQOzeA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com; spf=pass smtp.mailfrom=qq.com; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b=pq0QvCyL; arc=none smtp.client-ip=162.62.58.216 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qq.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b="pq0QvCyL" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1774073287; bh=K3F2Fq+dzbKSIPEcVrdMJMJaRex6Laz1laLkkj3l/f4=; h=From:To:Cc:Subject:Date; b=pq0QvCyLeeL+HyY0HxzzarSHLxXSmr0CMa3/YsbGW4Dq5lmKCEjqzRNc5jP4pAszk hTokhH9tQrehlEfUFvj60MGJ1Okptaws4KvUSDzRdKl8r9pHvwiMCAMMaZ/gqmpy9p ujlR5Es5t+V/TVfj+jgMwzUoDas3a+tY1CjDKJbY= Received: from localhost.localdomain ([120.229.96.134]) by newxmesmtplogicsvrszb51-1.qq.com (NewEsmtp) with SMTP id 2032F495; Sat, 21 Mar 2026 14:08:03 +0800 X-QQ-mid: xmsmtpt1774073283t6n3yd780 Message-ID: X-QQ-XMAILINFO: No7DFzN00JnRK+3nHNCZ3sG9RlxPCPphizHL/svxJINlYejD94FScBNxpOtrAw xhRd3X69NkwqDTHju3wSc2jp7Qn4BWdDoXcmThgG0YW5fAkjfoo2DFmitukM+NBW9a9eJydX7ouR DiM4mMYVLQ16phBW65MZkOjkZfRlus/m8VkpBX9tbQDg7BvV2eylwP36iTbNIJHGnUSbj+lO0IJp 35ytfRHYqnFwY7sn1V0XYiowo2y8SkdUlx9UhScUCW50hsGqHNj8lDGmOSD1TZNMIHfqTxr8B+qs SHmwlYsZiaMABupgfhSeyIDMsTCIyBuR0avHZmu7iwP4yQUa7paEq//aDdCvIkopKN0RnJCSEDMe 5qy0VOozTKqzTNaNHJKMsdiqOpRqHBH8r14A+xEH8fshnWbUCHUC8UCsUhUaGHWu90enkfgi6qlq gQxxrtKqY+AJSdY/71098HzPkJqVyQyTUDv537Ycn1y67Nb0iindZT0xpi2ZaejXz15TOhk9i6e0 upB2IJH5cRdeInKG2sA//D4T/1SDX1RfOMMGXf3pTcyv7gbEGPhzh2+x/d/xNcSzZeFLIRFHN1X6 VKLo83nWn56jKdnHNU6OJPgwWuWzjCXeLbtRCNsnX4OsqVkE/b/refYfGsb91jzmA8aYOauAvZLq 9Xzw659ffJRxOEDdVkKJBEnfs7LeW6/4GNGavwAd//usRrBhShzoB4AxnwRkXp+qFHcwds4vxvzD pPgVLGVXqw/2rsc4NOT6ANp1ONYAD46dfUKc3oEgKncoyl1EnFUs/wr1n5zVMf6Dz0W6fyOMY4kM tNZM9QcUX9MyAWo7r0RdD3h9MFzFZtTHnT3rDaNvNHKXaYn+s0govgaikzw426UB/NnSQfBAeuN/ KOLiWsIqnfnJ16oyofLaiZ/BxOYYSWTlGihw4crvHMcDN3J2jg+M55/p2K3ToC6rlHhlWvK0E5zv lAtSGbWv4B4m5CnINnViLVm0eG+T/n7jcVUvlpWiALA2yZmyiVKJ4SJYSLvE78SPTzWJUMhftkc4 uUuSN+C+3k268Ifkvh66okWjKBCHFtltwFHRWphQ== X-QQ-XMRINFO: NyFYKkN4Ny6FuXrnB5Ye7Aabb3ujjtK+gg== From: Weixie Cui <523516579@qq.com> To: ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org, Weixie Cui Subject: [PATCH bpf] bpf: propagate kvmemdup_bpfptr errors from bpf_prog_verify_signature Date: Sat, 21 Mar 2026 14:08:00 +0800 X-OQ-MSGID: <20260321060800.52699-1-523516579@qq.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Weixie Cui kvmemdup_bpfptr() returns -EFAULT when the user pointer cannot be copied, and -ENOMEM on allocation failure. The error path always returned -ENOMEM, misreporting bad addresses as out-of-memory. Return PTR_ERR(sig) so user space gets the correct errno. Signed-off-by: Weixie Cui Acked-by: Jiri Olsa --- kernel/bpf/syscall.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 274039e36465..51ade3cde8bb 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -2832,7 +2832,7 @@ static int bpf_prog_verify_signature(struct bpf_prog = *prog, union bpf_attr *attr sig =3D kvmemdup_bpfptr(usig, attr->signature_size); if (IS_ERR(sig)) { bpf_key_put(key); - return -ENOMEM; + return PTR_ERR(sig); } =20 bpf_dynptr_init(&sig_ptr, sig, BPF_DYNPTR_TYPE_LOCAL, 0, --=20 2.39.5 (Apple Git-154)