From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 AC45B30B508; Thu, 21 May 2026 15:22:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779376943; cv=none; b=J0L3DPjLTytWUchmWW696zlfxi4nLymzCiZHmf54SfXJ/wjo6cDniXtR1bwPzIT0MIDFWNrylfu7KTJ9C08mssza8m/cukkzO5TLgVUgLqNrD63I1b/6rEztQL57s89RTFCJs7ShBQYquJ40rGTeeMtfMKl4jTHENcZoDdS4rDA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779376943; c=relaxed/simple; bh=grv4WV0k/rmOQBRAzBbRoIpIiMCMRocZDKTENsGZPVc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=OOwvsaLCSaFxUXKG0ln8+ZzcIIdq8N1zSfYIoZqbjI8mRfbHMRrdbg2iMGydbKfh0NJjt0uQknMlb2UXGfIUe5ORqPIbjMlt4512pzAImW28ubPP6VeeGHcKWdSdKrgTGXy17P8Vgt5TaqfAJuhLXEtKOJdqTdTnoI0LdPIcYCM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hcI9OUm7; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hcI9OUm7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55EF81F000E9; Thu, 21 May 2026 15:22:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779376942; bh=bDrs657fJEwFv18I9GfHEiJjBoKDAm0MOhRfhNLzR/M=; h=From:To:Cc:Subject:Date; b=hcI9OUm7Ds3CD1skMz/e9rorlq30ZcvSo/DmIdygQeE6wYH6i4uq3pnuvTZb5jcM2 D/twpdiTiomOtWm6/ouchpy9jwaEFY81T09a5D9a+8tRKcA2zf4fghSkYcTP3r6n4i be9iSlQam7RrAKd+oQFHRsihffTgOsGTySBytQp226+PvfYZ+g4FkRJER5X6CJnNDy +0n0pPZ3hZsfx6RuHh5J14uB4KWX9+H7xGfPlKlxEEydHtzHaPzkdLaH2y7srBM/VD 3yUDwpXYFwogtAfRw/i/Ntv5o+KvymXG40yIlM2JtM2Wz2pmI1WcEu2LJngskoXijN BuwC2HQy0YbGw== From: KP Singh To: bpf@vger.kernel.org, linux-security-module@vger.kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, memxor@gmail.com Subject: [PATCH v2 0/2] gen_loader fixes Date: Thu, 21 May 2026 17:22:15 +0200 Message-ID: <20260521152217.2345235-1-kpsingh@kernel.org> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Fix off-by-one in the signed loader's cleanup jump and reject non-exclusive metadata maps. Patch 1 fixes a pre-existing bug: the cleanup-label offset in emit_signature_match() does not account for the MOV insn emitted before the JMP. Patch 2 adds an exclusivity check so the loader bails if the metadata map lacks excl_prog_hash, preventing stale-hash attacks from concurrent map writers. KP Singh (2): libbpf: fix off-by-one in emit_signature_match jump offset bpf, libbpf: reject non-exclusive metadata maps in the signed loader include/linux/bpf.h | 2 +- tools/lib/bpf/gen_loader.c | 19 +++++++++++++++++-- .../selftests/bpf/progs/verifier_map_ptr.c | 10 ++++++---- 3 files changed, 24 insertions(+), 7 deletions(-) -- 2.53.0