From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from air.basealt.ru (air.basealt.ru [194.107.17.39]) (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 CD4E2134CE7; Tue, 6 Feb 2024 16:21:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.107.17.39 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707236516; cv=none; b=tX6/YQe1cqxqcA1GxTQCTr1KU8l8ehj0myz7w8Gzndu86ytmif1S3ewFcZsmgn6y4S/EHFnp4b3nvdJZLsOmAgZs7KtvoAuVin0OcMUTCC8OmOgnVyloy7xwfoFJ4zd+k4OyLereY/4L1PcR2u3ciYP+l64ZHlU2gG/PM/9cB1Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707236516; c=relaxed/simple; bh=NbkL5XfG6+SdYyqh4jAsn7dWL31t3PQHaDc2LY+xSQQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=gsINK8BSi0mOgGThKYTa0l6nwTSFRrS2/kedT6aj20xJxBk8sO80xOSoF53l8r80pTv3rv/LT9GIg/wDOogbTgFNT8i5FATHDG06HhQdKTOuYmQFcpqf09B8kQfLwRgMU8tNBNDrCgO4Yb14JV8ZLn56X9fy81KsZIO8EQ7bcHo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=altlinux.org; spf=pass smtp.mailfrom=altlinux.org; arc=none smtp.client-ip=194.107.17.39 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=altlinux.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=altlinux.org Received: by air.basealt.ru (Postfix, from userid 490) id A655D2F20247; Tue, 6 Feb 2024 16:11:48 +0000 (UTC) X-Spam-Level: Received: from altlinux.malta.altlinux.ru (obninsk.basealt.ru [217.15.195.17]) by air.basealt.ru (Postfix) with ESMTPSA id 350FC2F20247; Tue, 6 Feb 2024 16:11:46 +0000 (UTC) From: kovalev@altlinux.org To: stable@vger.kernel.org, gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, linux-cifs@vger.kernel.org, keescook@chromium.org, sfrench@samba.org, pc@manguebit.com, harshit.m.mogalapalli@oracle.com Subject: [PATCH 5.15.y 0/1] smb: client: fix "df: Resource temporarily unavailable" on 5.15 stable kernel Date: Tue, 6 Feb 2024 19:11:10 +0300 Message-Id: <20240206161111.454699-1-kovalev@altlinux.org> X-Mailer: git-send-email 2.33.8 Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ATTENTION! Before applying this patch a conflict patch in the queue needs to be removed: https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-5.15/cifs-fix-off-by-one-in-smb2_query_info_init.patch Describe bug: After mounting a remote cifs resource, it becomes unavailable: df: /mnt/sambashare: Resource temporarily unavailable It was tested on the following Linux kernel: Linux altlinux 5.15.148 The error appeared starting from kernel 5.15.147 after adding the commit [1] "smb: client: fix OOB in SMB2_query_info_init()", in which the buffer length increases by 1 as a result of changes: . - iov[0].iov_len = total_len - 1 + input_len; + iov[0].iov_len = len; . [1] https://patchwork.kernel.org/project/cifs-client/patch/20231213152557.6634-2-pc@manguebit.com/ Error fixed by backported commit in next patch adapted for the 5.15 kernel: [PATCH 5.15.y 1/1] smb3: Replace smb2pdu 1-element arrays with flex-arrays P.S. I have already backported similar changes for the 5.10.y kernel [2], but I did not know that there was the same error on 5.15, since I only deal with kernels 5.10 and 6.1. Therefore, this patch is to follow the rules of backport to stable branches. [2] https://lore.kernel.org/all/2024012613-woozy-exhume-7b9d@gregkh/T/