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 8529A25785D; Fri, 3 Jul 2026 11:50:47 +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=1783079448; cv=none; b=t6kKHVxXpyT/a8+ZGi6u8XSpgd6ApVrvroWZLtQ66urvQvjH5stDeCTNA3uFvAUvme+ZMzyrCQPJAGEVNbvskY6xHSMDCGH3BHy63KA1gs7cajmmTl8S9vtutiGfk0TgDqSTGasD1TbFbmUC38fl6+T6hcHjIB/n8/472p4OH9Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783079448; c=relaxed/simple; bh=o1B2PiD7Dcjro3AZUtHdlmXGHnIGf5m1awLr6Wj1acE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VljfsWHTX6710CkXDb729ndZ+9K528BglvdewPxgRql/M1qsz5pIvuDm1TKwwuakniKvTi0gu8T7wZFf37IMSRIVg1fXzFUvlqMPy88EL/cZMiUU29KcsmvnBHc1OLDIKlBJmJFBmhAMsZ3ANiK9vgv3T6eV6N5CzwOY9VAXIQI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LE8FeGLl; 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="LE8FeGLl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6932F1F000E9; Fri, 3 Jul 2026 11:50:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783079447; bh=uOkmul1W1VL2+7L25PolcRw2cNoza+fUstOlngHhH3A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=LE8FeGLlALS5DVoWjr2xy9pUxfvQg5zfOjOXMIIiTzTDUWoreR7xnNysN7hKTgBL0 Ufy+BvzwbhBtfG75M53njtS1JkYiylFfp//5lrv/3fswAfghTOEV2YrhCxmYuomSYc tI4ESVOiqIevB689PdYmMn8s2u6PIRxeJOUImINAkoGke/JxxNBcQgWeGRPoJunTmk +KIfaBfnS8g+FdagXfj0kjoecNm3y1t9fuZiJZu5wBTr7rxa/oqsxeeXJP6CROCkiN kCl/9UxB5jGE7lVkMwaGoiozxK0L8DbJtgnt/Dtkt9BprRVzMnTeGhD8hvxAD8NEAT jQDwnLEPaJoAw== From: Jiri Olsa To: Oleg Nesterov , Peter Zijlstra , Ingo Molnar , Masami Hiramatsu , Andrii Nakryiko Cc: bpf@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: [PATCHv6 07/13] libbpf: Detect uprobe syscall with new error Date: Fri, 3 Jul 2026 13:49:11 +0200 Message-ID: <20260703114917.238144-8-jolsa@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260703114917.238144-1-jolsa@kernel.org> References: <20260703114917.238144-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In the previous optimized uprobe fix we changed the syscall error used for its detection from ENXIO to EPROTO. Changing related probe_uprobe_syscall detection check. Acked-by: Andrii Nakryiko Fixes: 05738da0efa1 ("libbpf: Add uprobe syscall feature detection") Signed-off-by: Jiri Olsa --- tools/lib/bpf/features.c | 4 ++-- tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/lib/bpf/features.c b/tools/lib/bpf/features.c index b7e388f99d0b..e5641fa60163 100644 --- a/tools/lib/bpf/features.c +++ b/tools/lib/bpf/features.c @@ -577,10 +577,10 @@ static int probe_ldimm64_full_range_off(int token_fd) static int probe_uprobe_syscall(int token_fd) { /* - * If kernel supports uprobe() syscall, it will return -ENXIO when called + * If kernel supports uprobe() syscall, it will return -EPROTO when called * from the outside of a kernel-generated uprobe trampoline. */ - return syscall(__NR_uprobe) < 0 && errno == ENXIO; + return syscall(__NR_uprobe) < 0 && errno == EPROTO; } #else static int probe_uprobe_syscall(int token_fd) diff --git a/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c b/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c index 955a37751b52..c944136252c6 100644 --- a/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c @@ -762,7 +762,7 @@ static void test_uprobe_error(void) long err = syscall(__NR_uprobe); ASSERT_EQ(err, -1, "error"); - ASSERT_EQ(errno, ENXIO, "errno"); + ASSERT_EQ(errno, EPROTO, "errno"); } static void __test_uprobe_syscall(void) -- 2.54.0