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 60BE125A33D; Mon, 12 May 2025 08:56:12 +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=1747040173; cv=none; b=llIEpBHU4yhTHeOpLdflcoWNFbILNBt7b81NDzzdi6mLwpE3aa1a+LcOVbDPB+gOZC9eEOTLTTkK/n0U8AdjfiikULWV4JK90XsH2Qv9yoJqnejxHYFrx4xY8Wb6Yv7m5pgv1uKIBxHkPo7Q6Z4R6DSIsTYKQyHYnha4qN+PWBo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747040173; c=relaxed/simple; bh=Km4WnFRvUry5Exd8fNEf7asKYTERy4VYPOic7LtuZb0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Zn9uH/dFsPd0gyb+lSYngOusQJnBKosoMzBSv7AO/ahwijIbnbIRHQvPyCF7NaOWea7xfnK4oWm672ECk7AP3eec+0fIjbiDbZMnh4j1eMWDhg0fMQcuwLE1FEVMExzuIZ4J0FvP4sfLLQtvSVfw7lOBVG52uJjWXMAl8BEh/oc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tRvNmCkM; 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="tRvNmCkM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CAAFAC4CEE7; Mon, 12 May 2025 08:56:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1747040172; bh=Km4WnFRvUry5Exd8fNEf7asKYTERy4VYPOic7LtuZb0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=tRvNmCkMCaX7DSgimUG1pB0JDYDuKxHOAmTsfvOgTZLezn6YSWB+qMg1XtleVwUwP ceSDhzT13Xk/xTj/PR3VfmleGsHPpVf3c6boaM7LSsifcj/phmALAa1pk3WHEV2hQ7 2jxz5sDsmjyRCbMVKBH6R8y87DRvFP9TrbjEemliVPTBFofUnPUbgIlbfRP9TIb8Hu HksRpddUGamHBVZT5iWxFP6XEOOe7H8MwZl09yFDce/sYQ1Du01o6v011DMZUWuuER 0ULh6/94mrQH0KzMZoXRLHqnEkx4y8Imys2tswsuntdk9fzGhqWuX6PVl37vIRyIgI hOafWZXvZW4Ww== From: Christian Brauner Date: Mon, 12 May 2025 10:55:25 +0200 Subject: [PATCH v6 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: <20250512-work-coredump-socket-v6-6-c51bc3450727@kernel.org> References: <20250512-work-coredump-socket-v6-0-c51bc3450727@kernel.org> In-Reply-To: <20250512-work-coredump-socket-v6-0-c51bc3450727@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=Km4WnFRvUry5Exd8fNEf7asKYTERy4VYPOic7LtuZb0=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWQobm9nWKW7aOeCndrcORrxUfl6b17O6fi2/2Cu/IKvj 3ntXFnOdpSyMIhxMciKKbI4tJuEyy3nqdhslKkBM4eVCWwIF6cATEQonuG/a8GaoHlT12+ZslI2 hFVifaWr6uS6cJGVZ/aasQrwncqKZ/hn4aDitNxgc+ReOw2r78ppZ+T7nXoXMDj28zDe7Ny9pJg LAA== 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 5ea0c93dd5ac..deee52bff6bc 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -1254,6 +1254,12 @@ 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[] = { { @@ -1297,6 +1303,13 @@ 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