From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794585781; b=xcCn3soEijEiKNROg4SRHIX40jeED6FFS5+HFSDb9BwUZScIlQYXS58Mf2Z0V3uJzlwg 4ULqOsvIIFisZHhmR/LqVU3KAUfdRpGNdK38gK4N8k1ERU+OYo3GMZ6WlIuYrZc+q6bCP a1UgsZOQTWgDx/xd2TKTaskn8ZGWMX1Uc7VApkgYmlu4sI0cA6MvybbAPy9WG9jp+FO7l xx10/KTzPJGBw6FWh+fXyUAcyS27GEWDJ+uj1jcSxph0f/wzN2EIDEXxA0W0rFWZnyNph EIwvwMK/n7NDHZq0jQ40l6xvr5L64qiYZoW1JJPJOBmlq8o/urMuMUXJbzbUUDZAdGw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794585781; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=UfYSV4lPKN9Ge/S0jzYyPARtJtcC521ICvdxLLkgLOc=; b=lRMrq9RSTONCiryT0oo+rp5bJ5C5PEArtS5pHPFnErRUGVZ8Ftna/EIYmPCAH/onXJY1 gSsEEa46k+MpmY9pWqgxWzkkAoTljtwIn7XxeJfJ69ti3o6tqTQewzRnQbcP8cz/Y+wuo FAqjIRpOqjBE3R1EfhXwA+/2SCiZBirLPagRiUbcn1zWw6yWnHQO6njJeXRn6NF0zTgsG 5ARJ123chcQ5XZy95vvLHNYBPJzA6zJHqbE8Bz/MX6ukanXsavqibfu0nAviKC14rMAsW ALtOOVoDaWxuelwaUrWKfxayy/3q7oavZfXHqGF8zBXIqBeZjRNQu8SVlpxDCBXrGSA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b="U/rWI+1C"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C7B3A606BA81; Fri, 13 Nov 2026 16:03:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=U/rWI+1C Received: by smtp.kernel.org (Postfix) with ESMTPSA id 721BD1F000C4; Fri, 13 Nov 2026 16:03:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794585781; bh=UfYSV4lPKN9Ge/S0jzYyPARtJtcC521ICvdxLLkgLOc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=U/rWI+1CBvB+53L8fSS43RjM6+lfh/+Q4tcUveZeBFCiOtctvW7FooYzgYTAOJ/d/ PtRguqC/M7pC0ExEdr2R5NsMxubYtjX4xmDwD1VW0siEdVU2EfvFPYQJjLwmmttjM9 q/QC6nMB41PrCUT2SWGu7AVdKMLCxw55sL96bXwY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Josef Bacik , "Lorenzo Stoakes (ARM)" , Pedro Falcato , "Harry Yoo (Meta)" , Muhammad Usama Anjum , "David Hildenbrand (Arm)" , Sasha Levin Subject: [PATCH 7.3 329/507] mm/vma: dont leak the charge for stack growth Date: Fri, 13 Nov 2026 10:50:33 -0500 Message-ID: <20261113153806.564333977@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261113153753.358973689@linuxfoundation.org> References: <20261113153753.358973689@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: David Hildenbrand (Arm) [ Upstream commit b1ee87802111156e27557e82acc31fa7dfc76e2a ] 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. 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. 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) Tested-by: Muhammad Usama Anjum Link: https://patch.msgid.link/20261031-fixes_core-v3-44-d6437171ecc3@kernel.org Signed-off-by: David Hildenbrand (Arm) Signed-off-by: Sasha Levin --- mm/vma.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/vma.c b/mm/vma.c index b257365f6e3c4..e382fd32f0fff 100644 --- a/mm/vma.c +++ b/mm/vma.c @@ -3260,7 +3260,8 @@ static int acct_stack_growth(struct vm_area_struct *vma, * Overcommit.. This must be the final test, as it will * update security statistics. */ - if (security_vm_enough_memory_mm(mm, grow)) + if (vma_test(vma, VMA_ACCOUNT_BIT) && + security_vm_enough_memory_mm(mm, grow)) return -ENOMEM; return 0; -- 2.53.0