From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 73707415F15; Tue, 21 Jul 2026 19:54:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784663643; cv=none; b=TAq6kyK8W5zPiBWtZ7zzkQqCfOpXRV4/yHfh0Y6HBq9b0ZQ61v378T3ijAl9/DdT/1wpbeW4tW3G9AxG9iGuGhF9aPPEJ47ZvRBuv3FLY0SZpTFEPzcbeS9wA9txdQcNHYSVleS2Ci8MDKTTeJbjkMLlBZ8TmV/WYOvFQW2psOE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784663643; c=relaxed/simple; bh=oSO932HHFGutvI5qrA/zVd92PD9G1+c3KyflPi01lr8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OnQcDJZD+B9UF2NXjAFHwq63KYYzBCNVC0FWXMvqYBcbcvU5hZIP43V6Pd1pUqdZOkvgwvE9ztMPZWiuaSN2RRaP8y1I0owy53CyRqpSOK1YS3KngPIHcYRzaIw9IbVMYlSSifQx3td+3gL5rkVwXDJkR37AUgabkCIp0psvTYY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PPjuMGTj; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="PPjuMGTj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D8EF51F000E9; Tue, 21 Jul 2026 19:54:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784663642; bh=gqlVJrpi13z2A4opK/ndNoMMoCDHXPnGoLfk0TEV3/g=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PPjuMGTjUbfotMyCnlzVAQegRb4XlJQ+dAjuhrEdRqVWVTfNF6cx/8je/GD67Dxk9 T5Vuhp6u7cyQlrTg4nvfxsWB0J9Vvpc2Br90ZfKyUC772CRdBjsW6WKng52/RdmJMR iUmL7TP66nCQ5keJSEIt9A44FYWaIkqBrUAP0RUw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Abdun Nihaal , Alison Schofield Subject: [PATCH 6.12 0900/1276] nvdimm/btt: Free arenas on btt_init() error paths Date: Tue, 21 Jul 2026 17:22:23 +0200 Message-ID: <20260721152506.181988995@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152446.065700225@linuxfoundation.org> References: <20260721152446.065700225@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Abdun Nihaal commit 1a6b6442a982d0ca5fb6a1a39b6f6dfd760eda57 upstream. The arenas allocated by discover_arenas() or create_arenas() are not freed on some error paths in btt_init(). This leaks memory when BTT initialization fails. Call free_arenas() from the affected error paths to release the allocations. [ as: commit message and log edits ] Fixes: 5212e11fde4d ("nd_btt: atomic sector updates") Cc: stable@vger.kernel.org Signed-off-by: Abdun Nihaal Reviewed-by: Alison Schofield Link: https://patch.msgid.link/20260519-nvdimmleaks-v1-2-592300fb7a43@cse.iitm.ac.in Signed-off-by: Alison Schofield Signed-off-by: Greg Kroah-Hartman --- drivers/nvdimm/btt.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) --- a/drivers/nvdimm/btt.c +++ b/drivers/nvdimm/btt.c @@ -1589,7 +1589,7 @@ static struct btt *btt_init(struct nd_bt if (btt->init_state != INIT_READY && nd_region->ro) { dev_warn(dev, "%s is read-only, unable to init btt metadata\n", dev_name(&nd_region->dev)); - return NULL; + goto err; } else if (btt->init_state != INIT_READY) { btt->num_arenas = (rawsize / ARENA_MAX_SIZE) + ((rawsize % ARENA_MAX_SIZE) ? 1 : 0); @@ -1599,25 +1599,28 @@ static struct btt *btt_init(struct nd_bt ret = create_arenas(btt); if (ret) { dev_info(dev, "init: create_arenas: %d\n", ret); - return NULL; + goto err; } ret = btt_meta_init(btt); if (ret) { dev_err(dev, "init: error in meta_init: %d\n", ret); - return NULL; + goto err; } } ret = btt_blk_init(btt); if (ret) { dev_err(dev, "init: error in blk_init: %d\n", ret); - return NULL; + goto err; } btt_debugfs_init(btt); return btt; +err: + free_arenas(btt); + return NULL; } /**