From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 63664606A31A for ; Fri, 30 Oct 2026 03:42:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=ksx/+zIn; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=PdykOuQ5 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Date: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Cc:To:Subject: From:Message-ID:MIME-Version:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=1NU0rp815o60LOooW0e6kyoi8YGgClNQEnOvVbCL4mM=; b=ksx/+zInLjI8pL6vNFg1nMRiMI gJI11jFDu1tQVH666ROHv4eLHTKqi1GT0S5P0nxlgo9ivPu2dz7OViw0zLb6HjoL6NqbGWMj5aiqD XDSqM547ZqiCPc8ABaKsarasZL0EPWdJHheX1VDopg4kWn+biWymuC+51Fu0C+rEKuzkjqjHkDTHH khpzKQojZF79dgCwduWKzcktMUQj2WhYsH1QVXyrT8me1iNO3h2aBnZH+/Gdz4PMaj7y4ypWgTDO6 h/chgD3sW8El8qhj9AJl97bcOUrtuwBf6pNQKPEglIfo/yeYbzHvdeZosHjJ3V0yWEw3Me6Xvsmlj R4c1VOyQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xMdVn-0000000AlIZ-0ORM; Fri, 30 Oct 2026 03:42:39 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xMdVl-0000000AlH6-3cnf for kexec@lists.infradead.org; Fri, 30 Oct 2026 03:42:37 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 4DB44600C8; Fri, 30 Oct 2026 03:42:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5B4561F000C1; Fri, 30 Oct 2026 03:42:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793331757; bh=1NU0rp815o60LOooW0e6kyoi8YGgClNQEnOvVbCL4mM=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=PdykOuQ5GId4NyNFUmFmRa7uXmR7JQMZkj/lRjTUVJs3CSAl12HZG3/YD9Co6h/h8 K7GAgjIsOWvb9xfdYpPL9TKMA0CaQ0rS6ZyqOJLJ6jg+tls2Njh7fQK8wFhWorZN+8 XcIFqUkL7R0Rq5GIJIzCtXoNslWBPnhmTGIqr2o4h7bo68FA0a1hb/fux8nn2hAPVg 9isA46x8/FDzI1dhuoO8GiunPrCizdoIFME9cK0gD/Ottbdc7qY8tNAsh8SiFSPBbf loJUAZ7/RmzOwrR0U3EhdoGNMDpUUOnr+vHWKqOTpPbnFm3Bkbklij8928ax0UXhuC 2ZyTLEvrf1tiA== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 44/47] mm/vma: don't leak the charge for stack growth To: =?utf-8?b?RGF2aWQgSGlsZGVuYnJhbmQgKEFybSk=?= , "Andrew Morton" , "Johannes Weiner" , "Michal Hocko" , "Qi Zheng" , "Shakeel Butt" , "Lorenzo Stoakes" , "Kairui Song" , "Barry Song" , "Axel Rasmussen" , "Yuanchu Xie" , "Wei Xu" , "Baoquan He" , "Baolin Wang" , "Liam R. Howlett" , "Vlastimil Babka" , "Mike Rapoport" , "Suren Baghdasaryan" , "Michal Hocko" , "Kees Cook" , "Peter Zijlstra" , "Jann Horn" , "Pedro Falcato" , "Hugh Dickins" , "Pasha Tatashin" , "Pratyush Yadav" , =?utf-8?b?TWF0dGhldyBXaWxjb3ggKE9yYWNsZSk=?= , "Jan Kara" , "Zi Yan" , "Lance Yang" , "Rik van Riel" , "Harry Yoo" , "Alistair Popple" , "Nico Pache" , "Ryan Roberts" , "Dev Jain" , "Usama Arif" , "Kiryl Shutsemau" , "Matthew Brost" , "John Hubbard" , "Peter Xu" , "Will Deacon" , "Aneesh Kumar K.V" , "Nick Piggin" , "Oscar Salvador" , "Minchan Kim" , "Muchun Song" , "Xu Xin" , "Chengming Zhou" , "Chris Li" , "Kemeng Shi" , "Nhat Pham" , "Youngjun Park" , "Gregory Price" , "Joshua Hahn" , "Rakie Kim" , "Ying Huang" , "Jason Gunthorpe" Cc: kexec@lists.infradead.org, "Josef Bacik" In-Reply-To: <20261029-fixes_core-v2-44-a64ce7f83abb@kernel.org> References: <20261029-fixes_core-v2-0-a64ce7f83abb@kernel.org> <20261029-fixes_core-v2-44-a64ce7f83abb@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 30 Oct 2026 03:42:34 +0000 X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Sender: "kexec" X-Spam-Status: No, score=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 X-Archived-By: > acct_stack_growth() charges stack expansion even without VM_ACCOUNT. > This can happen for read-only or MAP_NORESERVE mappings created with > MAP_GROWSDOWN. Unmapping these VMAs does not release the charge, leaking > Committed_AS. >=20 > Only check and charge growth for VM_ACCOUNT VMAs, matching mremap(). > Unaccounted growth skips the overcommit check while remaining subject > to the other stack-growth limits. >=20 > Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") > Cc: stable@vger.kernel.org > Reported-by: Josef Bacik > Reviewed-by: Lorenzo Stoakes (ARM) > Reviewed-by: Pedro Falcato > Reviewed-by: Harry Yoo (Meta) > Signed-off-by: David Hildenbrand (Arm) Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261029-fixes_core= -v2-0-a64ce7f83abb@kernel.org?part=3D44