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 9C0242253A8; Wed, 14 May 2025 22:04:29 +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=1747260269; cv=none; b=Ptm39vCn+WcnmuvBNzyclq8jlhBVjFsoEzxjUlWRC77GFKKMvt/lRImD2z8ZzQN8FL5/sAJxahRTwUWWK4CXS/1t4DWVsCI35V+t/kq8HbNqetBF+ER9d4lcrymFvhzdv5uZaZcuSzBVMtVLzEBUkw+rlE0sSXRnFAZWZxDp5eo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747260269; c=relaxed/simple; bh=g1fZL9UHjL0fdEg1HQk9U39MiHvgvwYopqxavC+sk70=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=jLcHVdeh4NF/2eJJYVzPvzoZQbJ5p7vvVbTGrz/LRVn52NOmZ9c0DHvFVbndMFRf2cvw76qsX2aj98N560K1DfffpX9AOYGU89gbii2px6ghabnoj6KWejv6nM33yxo2Pc/yJC40j67VUKnMsamGf6Ym7GYT1bIz/xCStN3Mwvg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OKrpacmM; 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="OKrpacmM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5156CC4CEE3; Wed, 14 May 2025 22:04:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1747260269; bh=g1fZL9UHjL0fdEg1HQk9U39MiHvgvwYopqxavC+sk70=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=OKrpacmML91nkBfYMF3/bgtlkVMboBLMScfTioqJiYFHDRym2zTdrxECB8risLyTw b8zfcpLRTMlOLYEZDSOovdavV8aA6CDL5nPD83/ESGredWpNZn5BAxtL5fORYSBExk tIF9DFoH9kzEuHiUJmOy0tZd6dD/lDBAMH0bHZat0RhbT08m6qzGGnMKZFqXLHNujm xu6q72F5r+w0KRDyRYaa7/IeP/jrMcxleAcUu0UBbOcf0pjpkgwcmFjWcUwOlvde4Y 4uoUkq6cy9QmLiyPgVGCJLb6R3B/sUM1/eFbHCOqog/m0GshzXx3SDTsS4iDRAy5kF sC7puHjQDgHbw== From: Christian Brauner Date: Thu, 15 May 2025 00:03:39 +0200 Subject: [PATCH v7 6/9] coredump: show supported coredump modes Precedence: bulk X-Mailing-List: linux-security-module@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: <20250515-work-coredump-socket-v7-6-0a1329496c31@kernel.org> References: <20250515-work-coredump-socket-v7-0-0a1329496c31@kernel.org> In-Reply-To: <20250515-work-coredump-socket-v7-0-0a1329496c31@kernel.org> To: linux-fsdevel@vger.kernel.org, Jann Horn , Daniel Borkmann , Kuniyuki Iwashima Cc: Eric Dumazet , Oleg Nesterov , "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, linux-security-module@vger.kernel.org, Christian Brauner , Alexander Mikhalitsyn X-Mailer: b4 0.15-dev-c25d1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1120; i=brauner@kernel.org; h=from:subject:message-id; bh=g1fZL9UHjL0fdEg1HQk9U39MiHvgvwYopqxavC+sk70=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWSoCntUvQ8X3b5k6ZxfRq/CTEtdV0c2iu+Rk1x89VWvR mGtWmdGRykLgxgXg6yYIotDu0m43HKeis1GmRowc1iZQIYwcHEKwEScTzIynBM8lSR8MZI3XP/E njeHdz/fZ2p6SeTKYbYQg3PyW+aK8zIyfG5dopHJE3o04am+NadCcO3iP6duZN5f0VLyanVuyrs rrAA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Allow userspace to discover what coredump modes are supported. Signed-off-by: Christian Brauner --- fs/coredump.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/fs/coredump.c b/fs/coredump.c index bfc4a32f737c..6ee38e3da108 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -1240,6 +1240,12 @@ static int proc_dostring_coredump(const struct ctl_table *table, int write, static const unsigned int core_file_note_size_min = CORE_FILE_NOTE_SIZE_DEFAULT; static const unsigned int core_file_note_size_max = CORE_FILE_NOTE_SIZE_MAX; +static char core_modes[] = { + "file\npipe" +#ifdef CONFIG_UNIX + "\nsocket" +#endif +}; static const struct ctl_table coredump_sysctls[] = { { @@ -1283,6 +1289,13 @@ static const struct ctl_table coredump_sysctls[] = { .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, }, + { + .procname = "core_modes", + .data = core_modes, + .maxlen = sizeof(core_modes) - 1, + .mode = 0444, + .proc_handler = proc_dostring, + }, }; static int __init init_fs_coredump_sysctls(void) -- 2.47.2