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 4A7A837883; Mon, 18 Dec 2023 12:44:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="myJh/V5s" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 03EFBC433CA; Mon, 18 Dec 2023 12:44:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1702903477; bh=fshcEVw9K2IIEPBWEG2Uqu+aE3s8suJzHOqMwGZRdno=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=myJh/V5sIw3CaUvW6kPfxXwIirwhtHb+k7cKARGd3O1hdj4Kyq8ulNCopzoicT9Je P9WuBUBIBYO/SD/YzjTNwhz8PMO0A8A9nCcn4ZaXRbr2BWZNW5iMr2bh2ARt24Pa4w eKBYejiy0rv1v9XrqOjlcCsjxrSIV/pQtq+PEZ51R87kl6sA5ek4+7WN0TYezdRSSD 2OeLIUNZTiIKaZWN8TlBmfqRuAu4LCSX+Fqj/+dvkp+F59ZpGXNBzbfy+cvWSc45u4 49QR5G2YMMcjj2o9DBJD3WSCknaeEQwLoIIVErcubl6ignEUg87mz4u+4Biwj4Zw00 BuzYb7MlfrOyw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Namjae Jeon , Steve French , Sasha Levin , sfrench@samba.org, linux-cifs@vger.kernel.org Subject: [PATCH AUTOSEL 6.6 10/18] ksmbd: avoid duplicate opinfo_put() call on error of smb21_lease_break_ack() Date: Mon, 18 Dec 2023 07:43:44 -0500 Message-ID: <20231218124415.1379060-10-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231218124415.1379060-1-sashal@kernel.org> References: <20231218124415.1379060-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.7 Content-Transfer-Encoding: 8bit From: Namjae Jeon [ Upstream commit 658609d9a618d8881bf549b5893c0ba8fcff4526 ] opinfo_put() could be called twice on error of smb21_lease_break_ack(). It will cause UAF issue if opinfo is referenced on other places. Signed-off-by: Namjae Jeon Signed-off-by: Steve French Signed-off-by: Sasha Levin --- fs/smb/server/smb2pdu.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index 269fbfb3cd678..c0c92898c86a1 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -8205,6 +8205,11 @@ static void smb21_lease_break_ack(struct ksmbd_work *work) le32_to_cpu(req->LeaseState)); } + if (ret < 0) { + rsp->hdr.Status = err; + goto err_out; + } + lease_state = lease->state; opinfo->op_state = OPLOCK_STATE_NONE; wake_up_interruptible_all(&opinfo->oplock_q); @@ -8212,11 +8217,6 @@ static void smb21_lease_break_ack(struct ksmbd_work *work) wake_up_interruptible_all(&opinfo->oplock_brk); opinfo_put(opinfo); - if (ret < 0) { - rsp->hdr.Status = err; - goto err_out; - } - rsp->StructureSize = cpu_to_le16(36); rsp->Reserved = 0; rsp->Flags = 0; -- 2.43.0