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 40BB7216608 for ; Wed, 26 Feb 2025 02:14:18 +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=1740536058; cv=none; b=Tg6NHID26DedpRIR9t1BOalYVxiN/Im8SjW9h5YdoEbmNMD8ZjxdFAMfeAGrbIcigVPlR28dEE09iOxGw3SFkGzYo0udxb22MBmNOheoGKb9jbQT2RNlByHMmyODSunSmxgKKoOloN+5+4nmwO6arZJsuDSusZBRubLyFMdHsYs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740536058; c=relaxed/simple; bh=DzQV0SIA8hzPAK+qOzZZah1B498A/NX3Zvj5sIpVQjA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=neV/Eczgmgp9kvQ4zhneFvPd5EogM4R5uAhxiMVWdMYt7EkmVjAaUEzUgLKeNpFGI4+GX65tNrtWRcgJKF6P2F2YcTFngdFXf0fbWvt+/EI/uOQYEwSVwNdKvchPjugAfzq+2sGI5xp1cHaUWOiuSYK1AVT6zgDq1UllBTe3Fhk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=JKrC9qh3; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="JKrC9qh3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0238EC4CEE6; Wed, 26 Feb 2025 02:14:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1740536058; bh=DzQV0SIA8hzPAK+qOzZZah1B498A/NX3Zvj5sIpVQjA=; h=From:To:Cc:Subject:Date:Reply-to:From; b=JKrC9qh3Hkd52B6FYt8jP7h+1kzCf4eG/pPC0CHljaaDLcN5gOZyMiUYSdmzRNMZ/ qEN4nWur/FI8DLlKTXQMtq72BxN4E62gVvY4gt6AAP/7+7jBq6SqvhvcfrXixR0jZb yCadPuJqP2Rdd78a29F/TPGT/tse92NM1WweRHho= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-49436: powerpc/papr_scm: Fix leaking nvdimm_events_map elements Date: Wed, 26 Feb 2025 03:11:50 +0100 Message-ID: <2025022656-CVE-2022-49436-e924@gregkh> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , X-Developer-Signature: v=1; a=openpgp-sha256; l=2777; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=DzQV0SIA8hzPAK+qOzZZah1B498A/NX3Zvj5sIpVQjA=; b=owGbwMvMwCRo6H6F97bub03G02pJDOn7yr8eT9Hwfnxh2av1Wsf4Pn/9UfFzkfmkSnub3/umn +rs+zRrT0csC4MgE4OsmCLLl208R/dXHFL0MrQ9DTOHlQlkCAMXpwBMpFuGYcGh5XlrhMNfnQvR ex8b5ur34LXn0hSGBWfK5S2mT9+x51tJiMl3oRyLh19zVwEA X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit Description =========== In the Linux kernel, the following vulnerability has been resolved: powerpc/papr_scm: Fix leaking nvdimm_events_map elements Right now 'char *' elements allocated for individual 'stat_id' in 'papr_scm_priv.nvdimm_events_map[]' during papr_scm_pmu_check_events(), get leaked in papr_scm_remove() and papr_scm_pmu_register(), papr_scm_pmu_check_events() error paths. Also individual 'stat_id' arent NULL terminated 'char *' instead they are fixed 8-byte sized identifiers. However papr_scm_pmu_register() assumes it to be a NULL terminated 'char *' and at other places it assumes it to be a 'papr_scm_perf_stat.stat_id' sized string which is 8-byes in size. Fix this by allocating the memory for papr_scm_priv.nvdimm_events_map to also include space for 'stat_id' entries. This is possible since number of available events/stat_ids are known upfront. This saves some memory and one extra level of indirection from 'nvdimm_events_map' to 'stat_id'. Also rest of the code can continue to call 'kfree(papr_scm_priv.nvdimm_events_map)' without needing to iterate over the array and free up individual elements. The Linux kernel CVE team has assigned CVE-2022-49436 to this issue. Affected and fixed versions =========================== Issue introduced in 5.18 with commit 4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b and fixed in 5.18.3 with commit b073096df4dec70d0436321b7093bad27ae91f9e Issue introduced in 5.18 with commit 4c08d4bbc089a95f3f38389c2b79dbc6ab24f10b and fixed in 5.19 with commit 0e0946e22f3665d27325d389ff45ade6e93f3678 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2022-49436 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: arch/powerpc/platforms/pseries/papr_scm.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/b073096df4dec70d0436321b7093bad27ae91f9e https://git.kernel.org/stable/c/0e0946e22f3665d27325d389ff45ade6e93f3678