From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 1872F254AF8; Fri, 2 May 2025 12:43:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746189792; cv=none; b=Tw34LRd0T4GB16gQo1tZmsNOvgN838u3pnDS1FwietdQ+e/CxDMA5eDQ/etmu9Z2/jimlB1LaSpN1uAndPebYgdK9Bi9wwjYLsZl3M+hfupTlugCx08nlQ7RlFLvurrBg+b2qeNmrv+C6GsPjCLtLRT8cxKN9MZYnqKq4X7eI9A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746189792; c=relaxed/simple; bh=vWvdauE0P4tZXK3aJ6k30xFFFQGEsyt1LCtOQc4zs2U=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=WIXIxBGXs4P9KGTFwBeRGck07qJCSfOZwxJ10hNut0Z+fm75q8RzgrtGSWzRXgMmv5OMOCoNKOAFl3z3jYLCtIc9SNpYglW2ZTfvvSs6T2bKxtfK9EO33GEdoAFPSfdmdPdUrK5r9lUT5OJDLURQ+A16CslnKtZBPFj7QHY+WbM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XYqTei7I; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XYqTei7I" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88201C4CEE4; Fri, 2 May 2025 12:43:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746189791; bh=vWvdauE0P4tZXK3aJ6k30xFFFQGEsyt1LCtOQc4zs2U=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=XYqTei7Iu717MS6b7ipZKgw+7d6TYnrO/ZshwmXBbtxlMtnnKr4OPPLjqd0vPkAgT n6YHXGQLnlEcyvPAZ0Dwe5y9QCGcHYp/kyb5Kdj1i2iU/sMZIY6rrR5Yr0RlElFezm 8OAQ2ZoMohXDDtwTtfPBLehkR4OV8jMs9Nfm7Ve5kFFWIs2Bvh9xY4EWqecGiUbPkx 09i1q73tAANoD9XJeieDt+YFOEme7kJwGAdD9C/hNbMb/NrN8Y1BJNDwJUOoNWX4Aq b6CEGrdd7oJk8uAoge6agezK+xLh20eYi8QifSVinXAOyyZo9KjIUHoJ5lHFuSo6d8 0TpZCwYd5xADw== From: Christian Brauner Date: Fri, 02 May 2025 14:42:37 +0200 Subject: [PATCH RFC v2 6/6] selftests/coredump: add tests for AF_UNIX coredumps Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250502-work-coredump-socket-v2-6-43259042ffc7@kernel.org> References: <20250502-work-coredump-socket-v2-0-43259042ffc7@kernel.org> In-Reply-To: <20250502-work-coredump-socket-v2-0-43259042ffc7@kernel.org> To: Eric Dumazet , Kuniyuki Iwashima , Oleg Nesterov , linux-fsdevel@vger.kernel.org, Jann Horn Cc: "David S. Miller" , Alexander Viro , Daan De Meyer , David Rheinsberg , Jakub Kicinski , Jan Kara , Lennart Poettering , Luca Boccassi , Mike Yuan , Paolo Abeni , Simon Horman , =?utf-8?q?Zbigniew_J=C4=99drzejewski-Szmek?= , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Christian Brauner X-Mailer: b4 0.15-dev-c25d1 X-Developer-Signature: v=1; a=openpgp-sha256; l=2158; i=brauner@kernel.org; h=from:subject:message-id; bh=vWvdauE0P4tZXK3aJ6k30xFFFQGEsyt1LCtOQc4zs2U=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWSI7D1w0ctzz1Ephx8XKvuajIUbKwye+8azC7CvF/5iU aVY9lq7o5SFQYyLQVZMkcWh3SRcbjlPxWajTA2YOaxMIEMYuDgFYCLvDRn+pznNU5+QMM/DJ32b 6xf3vdLLTzE63PG2mmLgHinpyV7szsgw+3XpQ6e0RX/q+DPsL+jJp20/8G3VBNvMKWxsGl/sHd6 wAQA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Add a simple test for generating coredumps via AF_UNIX sockets. Signed-off-by: Christian Brauner --- tools/testing/selftests/coredump/stackdump_test.c | 50 +++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/tools/testing/selftests/coredump/stackdump_test.c b/tools/testing/selftests/coredump/stackdump_test.c index fe3c728cd6be..ccaee98dbee3 100644 --- a/tools/testing/selftests/coredump/stackdump_test.c +++ b/tools/testing/selftests/coredump/stackdump_test.c @@ -5,7 +5,9 @@ #include #include #include +#include #include +#include #include #include "../kselftest_harness.h" @@ -154,4 +156,52 @@ TEST_F_TIMEOUT(coredump, stackdump, 120) fclose(file); } +TEST_F(coredump, socket) +{ + int fd, ret, status; + FILE *file; + pid_t pid, pid_socat; + struct stat st; + char core_file[PATH_MAX]; + + ASSERT_EQ(unshare(CLONE_NEWNS), 0); + ASSERT_EQ(mount(NULL, "/", NULL, MS_PRIVATE | MS_REC, NULL), 0); + ASSERT_EQ(mount(NULL, "/tmp", "tmpfs", 0, NULL), 0); + + pid_socat = fork(); + ASSERT_GE(pid_socat, 0); + if (pid_socat == 0) { + execlp("socat", "socat", + "unix-listen:/tmp/coredump.socket,fork", + "FILE:/tmp/coredump_file,create,append,trunc", + (char *)NULL); + _exit(EXIT_FAILURE); + } + + file = fopen("/proc/sys/kernel/core_pattern", "w"); + ASSERT_NE(NULL, file); + + ret = fprintf(file, ":/tmp/coredump.socket"); + ASSERT_EQ(ret, strlen(":/tmp/coredump.socket")); + ASSERT_EQ(fclose(file), 0); + + pid = fork(); + ASSERT_GE(pid, 0); + if (pid == 0) + crashing_child(); + + waitpid(pid, &status, 0); + ASSERT_TRUE(WIFSIGNALED(status)); + ASSERT_TRUE(WCOREDUMP(status)); + + ASSERT_EQ(kill(pid_socat, SIGTERM), 0); + waitpid(pid_socat, &status, 0); + ASSERT_TRUE(WIFEXITED(status)); + ASSERT_EQ(WEXITSTATUS(status), 143); + + /* We should somehow validate the produced core file. */ + ASSERT_EQ(stat("/tmp/coredump_file", &st), 0); + ASSERT_GT(st.st_size, 0); +} + TEST_HARNESS_MAIN -- 2.47.2