From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A7E34C63703 for ; Thu, 8 Dec 2022 16:38:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230170AbiLHQiV (ORCPT ); Thu, 8 Dec 2022 11:38:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48272 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229898AbiLHQiT (ORCPT ); Thu, 8 Dec 2022 11:38:19 -0500 Received: from mail-ed1-x52c.google.com (mail-ed1-x52c.google.com [IPv6:2a00:1450:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 510A913F1A for ; Thu, 8 Dec 2022 08:38:18 -0800 (PST) Received: by mail-ed1-x52c.google.com with SMTP id c17so2515253edj.13 for ; Thu, 08 Dec 2022 08:38:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=cc:to:message-id:date:from:content-transfer-encoding:mime-version :subject:from:to:cc:subject:date:message-id:reply-to; bh=dOtUGB6deKRvn6QoEmSpDe75lDhRqv61wD41Q8wWa80=; b=luem0n8WFWkWja2+Lv9JWQ+NtS8d+lsAB1pdwuXlv1mobiAy5zJwV/OlL3+I3f3okx mwUsp+3XwMnR9KcjNX5CdaIDgWQjlwa7WvLFcRcbUNLwdlM1rNeRmyLA/1mWO6Yx5yNb M1slKZeooAQ/yUAV9jsI6EUZVVK5GkIXh06Bs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:message-id:date:from:content-transfer-encoding:mime-version :subject:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=dOtUGB6deKRvn6QoEmSpDe75lDhRqv61wD41Q8wWa80=; b=0FjW9Lh+z/+h24FKpGdDv/Q6k6tK1rRQYSQESdN32kIzvjkcCJCj/5uyPkvqKZ0Ww/ eMkqVN4G9C1bzsRmyGDiVY0TTTRKHy+U2vNxZD5TubK70OKJGPq9nXrFt7LjxVX7laRa S1SzkGQipDZEqJd9rkthc8isBKhUJAUQtabcVg5R2FRofZ0z+qHMonVWiTsw97SH2GLs 80llZX9jV/HfMgO5ljpGAKX6nfXtL1/O5arLD6LCF/kCMY+VlZMTqQtcRvzWNPz0LWda qp1bZYJnyMi/l8ZiF7dN66BR9yUHaZpq5U6YR4BNij9IPTCQ5EzmZgKMQpW0b+K/TakX S2MA== X-Gm-Message-State: ANoB5pnvjqN5TfpPn0l0WfhZMeN9k25Rj9cDz1RWpuh4ac+cOmWmZVjh LyQhm8N4nyZkOQbUCgok64ru9g== X-Google-Smtp-Source: AA0mqf6OBO9M0R4/tfeQ7wCA5W1m2OqhyRTihnaGWK/QGkoR17B6i0FAiHXfxux+B4+6fGussdqmUg== X-Received: by 2002:a05:6402:550c:b0:462:6ba5:7215 with SMTP id fi12-20020a056402550c00b004626ba57215mr2498559edb.32.1670517496878; Thu, 08 Dec 2022 08:38:16 -0800 (PST) Received: from alco.roam.corp.google.com ([2a00:79e1:abd:5c00:8aae:c483:8219:bdba]) by smtp.gmail.com with ESMTPSA id ck3-20020a0564021c0300b0046778ce5fdfsm3569046edb.10.2022.12.08.08.38.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Dec 2022 08:38:16 -0800 (PST) Subject: [PATCH v2 0/3] kexec: Add new parameter to limit the access to kexec MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAOcSkmMC/32NQQrCMBBFr1Jm7UgnVVpdeQ9xkaTTJlgTmGmLUn p3gwdw9Xkf3v8bKEtkhWu1gfAaNeZUwBwq8MGmkTH2hcHUxhDRCfuo1k2MT36zR2HlGeniWiZqm6 YboJjOKqMTm3woblqmqZQh6pzl83taqcT9/+hKWOPgztSb2g9dSzcfJL/i8jpmGeGx7/sXh46T4b 4AAAA= From: Ricardo Ribalda Date: Thu, 08 Dec 2022 17:37:59 +0100 Message-Id: <20221114-disable-kexec-reset-v2-0-c498313c1bb5@chromium.org> To: Philipp Rudo , Eric Biederman , Jonathan Corbet Cc: linux-doc@vger.kernel.org, Ricardo Ribalda , Steven Rostedt , "Joel Fernandes (Google)" , kexec@lists.infradead.org, Sergey Senozhatsky , Ross Zwisler , linux-kernel@vger.kernel.org X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=1662; i=ribalda@chromium.org; h=from:subject:message-id; bh=CbpfLIuX926ztJbaYvtqTfAOAnBai/eNkyo5FXq7sBA=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjkhLppvk90Qatmkolw5wibtDPfBL94H1JvWQvB3WN cRKiW5CJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY5IS6QAKCRDRN9E+zzrEiE+MD/ 4jdZg1kfEyEVoTWZAnJ1gKb1scJhScOKm2An2e7s036FbeW+77cKX3+2hRGFOoSM9Q0WJiqkrps2hE ZuwISGYDHOVPv1cCAeIMKsaI1nzfqxS0lkdJfh/DVwdMhFCzMwUvzc/dI0cc0ul4qlDeJ1dWLIO2cV kxIMUfW5TTza7srzsy0xrrh8WYp+6flBKUCurqA31vYd+BjjzByskXJM7Eor0H5Or/nlTur+ARZrfC WeIw/AkROr3dp85JtTcE72FnTkvzMLuz4qesZQYZ4QtGbxRd8sGQLyqDpFAKAizhSoTb4FK0Ds5med c4mphKC89svw+/N5CCmsKkm3murdJCVOeMw4OmOsN4iElzjRG91EuBwfjZhLHalLBPT1F93fXRBSP0 wXVb7HYBRA4Np9kTesGVp4D7QFZB1GQMx3zNfVQqkkAUbNl/VSqmRTJlOzHzUg2nXg964WGpAJ8esG DXVUAcdwgvwr7EjTKMcf/RkVMMbjR+wVX81hOQzYZC566o2Ai6l6tn+MdsAjE8lFxHGe4JIwhY4QNa ID8Oq2Uke1TrIsB61xgGjEuhLUUL+72eAO5vSkF/sWfCMGrc/9hZnWCaXlofTQYbhvxxt1GeoaZPWn h+x13mZFFA0wbhl57zPeqFvTIPojayferH1Lc8pZxfGwUlqCndwqqw9YdV8Q== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add two parameter to specify how many times a kexec kernel can be loaded. These parameter allow hardening the system. While we are at it, fix a documentation issue and refactor some code. To: Jonathan Corbet To: Eric Biederman Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: kexec@lists.infradead.org Cc: Joel Fernandes (Google) Cc: Sergey Senozhatsky Cc: Steven Rostedt Cc: Ross Zwisler To: Philipp Rudo Signed-off-by: Ricardo Ribalda --- Changes in v2: - Instead of kexec_reboot_disabled, add two new counters (Thanks Philipp!) - Link to v1: https://lore.kernel.org/r/20221114-disable-kexec-reset-v1-0-fb51d20cf871@chromium.org --- Ricardo Ribalda (3): Documentation: sysctl: Correct kexec_load_disabled kexec: Factor out kexec_load_permited kexec: Introduce paramters load_limit_reboot and load_limit_panic Documentation/admin-guide/kernel-parameters.txt | 14 ++++ Documentation/admin-guide/sysctl/kernel.rst | 7 +- include/linux/kexec.h | 3 +- kernel/kexec.c | 2 +- kernel/kexec_core.c | 98 ++++++++++++++++++++++++- kernel/kexec_file.c | 2 +- 6 files changed, 119 insertions(+), 7 deletions(-) --- base-commit: 479174d402bcf60789106eedc4def3957c060bad change-id: 20221114-disable-kexec-reset-19b7e117338f Best regards, -- Ricardo Ribalda From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EC9CAC3A5A7 for ; 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Thu, 08 Dec 2022 08:38:16 -0800 (PST) Subject: [PATCH v2 0/3] kexec: Add new parameter to limit the access to kexec MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAOcSkmMC/32NQQrCMBBFr1Jm7UgnVVpdeQ9xkaTTJlgTmGmLUn p3gwdw9Xkf3v8bKEtkhWu1gfAaNeZUwBwq8MGmkTH2hcHUxhDRCfuo1k2MT36zR2HlGeniWiZqm6 YboJjOKqMTm3woblqmqZQh6pzl83taqcT9/+hKWOPgztSb2g9dSzcfJL/i8jpmGeGx7/sXh46T4b 4AAAA= From: Ricardo Ribalda Date: Thu, 08 Dec 2022 17:37:59 +0100 Message-Id: <20221114-disable-kexec-reset-v2-0-c498313c1bb5@chromium.org> To: Philipp Rudo , Eric Biederman , Jonathan Corbet Cc: linux-doc@vger.kernel.org, Ricardo Ribalda , Steven Rostedt , "Joel Fernandes (Google)" , kexec@lists.infradead.org, Sergey Senozhatsky , Ross Zwisler , linux-kernel@vger.kernel.org X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=1662; i=ribalda@chromium.org; h=from:subject:message-id; bh=CbpfLIuX926ztJbaYvtqTfAOAnBai/eNkyo5FXq7sBA=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjkhLppvk90Qatmkolw5wibtDPfBL94H1JvWQvB3WN cRKiW5CJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY5IS6QAKCRDRN9E+zzrEiE+MD/ 4jdZg1kfEyEVoTWZAnJ1gKb1scJhScOKm2An2e7s036FbeW+77cKX3+2hRGFOoSM9Q0WJiqkrps2hE ZuwISGYDHOVPv1cCAeIMKsaI1nzfqxS0lkdJfh/DVwdMhFCzMwUvzc/dI0cc0ul4qlDeJ1dWLIO2cV kxIMUfW5TTza7srzsy0xrrh8WYp+6flBKUCurqA31vYd+BjjzByskXJM7Eor0H5Or/nlTur+ARZrfC WeIw/AkROr3dp85JtTcE72FnTkvzMLuz4qesZQYZ4QtGbxRd8sGQLyqDpFAKAizhSoTb4FK0Ds5med c4mphKC89svw+/N5CCmsKkm3murdJCVOeMw4OmOsN4iElzjRG91EuBwfjZhLHalLBPT1F93fXRBSP0 wXVb7HYBRA4Np9kTesGVp4D7QFZB1GQMx3zNfVQqkkAUbNl/VSqmRTJlOzHzUg2nXg964WGpAJ8esG DXVUAcdwgvwr7EjTKMcf/RkVMMbjR+wVX81hOQzYZC566o2Ai6l6tn+MdsAjE8lFxHGe4JIwhY4QNa ID8Oq2Uke1TrIsB61xgGjEuhLUUL+72eAO5vSkF/sWfCMGrc/9hZnWCaXlofTQYbhvxxt1GeoaZPWn h+x13mZFFA0wbhl57zPeqFvTIPojayferH1Lc8pZxfGwUlqCndwqqw9YdV8Q== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221208_083820_535392_C2CFF9AA X-CRM114-Status: UNSURE ( 8.71 ) X-CRM114-Notice: Please train this message. X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org Add two parameter to specify how many times a kexec kernel can be loaded. These parameter allow hardening the system. While we are at it, fix a documentation issue and refactor some code. To: Jonathan Corbet To: Eric Biederman Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: kexec@lists.infradead.org Cc: Joel Fernandes (Google) Cc: Sergey Senozhatsky Cc: Steven Rostedt Cc: Ross Zwisler To: Philipp Rudo Signed-off-by: Ricardo Ribalda --- Changes in v2: - Instead of kexec_reboot_disabled, add two new counters (Thanks Philipp!) - Link to v1: https://lore.kernel.org/r/20221114-disable-kexec-reset-v1-0-fb51d20cf871@chromium.org --- Ricardo Ribalda (3): Documentation: sysctl: Correct kexec_load_disabled kexec: Factor out kexec_load_permited kexec: Introduce paramters load_limit_reboot and load_limit_panic Documentation/admin-guide/kernel-parameters.txt | 14 ++++ Documentation/admin-guide/sysctl/kernel.rst | 7 +- include/linux/kexec.h | 3 +- kernel/kexec.c | 2 +- kernel/kexec_core.c | 98 ++++++++++++++++++++++++- kernel/kexec_file.c | 2 +- 6 files changed, 119 insertions(+), 7 deletions(-) --- base-commit: 479174d402bcf60789106eedc4def3957c060bad change-id: 20221114-disable-kexec-reset-19b7e117338f Best regards, -- Ricardo Ribalda _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec