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=1794060997; b=zcNcmRSGIJGAmX9Hd8fFJKZOzGXaf7Zg5ujqgL3ZvIEMvlN+n760imsSgWGjeNgLZXnC FKSHqQwENSp0OUikBxMar9ZMkDGehtkSb7UFoSF1CFKADlw8cAZZBAAFSq/JuDhHy7Xub ZHUdZT4FCEzBXzgmasu+HG1gyr4/Rdt/noLq1ukj+XNpOHi7Wn097B7dQoy2zX9tpdiX1 z1PLfgnzUdE1liMmIW3gQVFGzBc5jwl//KTAQw34WB1+LmDF5WUw3J4aEjQeBwNPwVqYo 4wbGT7z00MDt1NQ2epO3yGJ2+uPOtb4db7tZ2AsHwHtIXh/qHg1CarOEgaMUjTEA/kA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794060997; 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=ASD88ZdN/+XsvCex5GN3NkMTSkAwc6x8mvVde+aMGO4=; b=I6niycvMDv4KUrBxPQLNNR9P0V7Th/ozTLZu/Fh3O2h/XoNtVxLb4D58dDAvIriWtfJL m6T1oXffF7XlbueBXrNGrIQHnS5eR6EUVwMkNJlH+bPRd/Rh1Oq0fJ6aV8gGRPqQc6hNV XBM9u/tAKXe3hKTBwoWBKKerijIA/0B6KQBZ/eNLoVYqGoabegKRTv/EwZEzz5j0pdgF9 yxa1ylbAM8YFlXM/ROsHOkq9GTVsb2Bj72Sw4LqB957Pu+UYtOUAI9jNNL5xBtlhzRRBf w0SUVg9+vztyD3W7ii8JkBgKrOJdKvQVUBlCmrnfiRfxtyivSKuW6hC9fHXzvbknDHw== 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=ElU03gxW; 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 6AB92606EEB8; Sat, 7 Nov 2026 14:16:37 +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=ElU03gxW Received: by smtp.kernel.org (Postfix) with ESMTPSA id 200761F008A2; Sat, 7 Nov 2026 14:16:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794060997; bh=ASD88ZdN/+XsvCex5GN3NkMTSkAwc6x8mvVde+aMGO4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ElU03gxWwrDWqBDaWxunfbIz6SKKXlZmPrb/EIlK34iT9OEaQjq3o6SWozUeCme15 j1rvT3WF2pzdxstNwBbyJrivFkhDTUBIFbfa/ZGGtw84ocBDTtarFuiULYA3Fc7IVX Kntbf2U6PmEwxGvynFXdp8m+E83UUFDRpBKQvB4I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Namjae Jeon , Sasha Levin Subject: [PATCH 6.12 0344/1536] ksmbd: handle empty QUERY_ALLOCATED_RANGES output Date: Sat, 7 Nov 2026 08:39:20 -0500 Message-ID: <20261107135007.340928125@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134957.653319350@linuxfoundation.org> References: <20261107134957.653319350@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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Namjae Jeon [ Upstream commit 7f07791522a251e2be087d11ae9cd51eb3408f1d ] FSCTL_QUERY_ALLOCATED_RANGES can be issued with a valid input buffer but without room for an output range. Do not reject the request before looking at the file layout. If the query would produce a range, return STATUS_BUFFER_TOO_SMALL. If it produces no ranges, return success with an empty output. Signed-off-by: Namjae Jeon Signed-off-by: Sasha Levin --- fs/smb/server/smb2pdu.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index 3ff76c851cc40..2c74e0fd82b9a 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -8260,8 +8260,6 @@ static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, int ret = 0; *out_count = 0; - if (in_count == 0) - return -EINVAL; start = le64_to_cpu(qar_req->file_offset); length = le64_to_cpu(qar_req->length); @@ -8273,8 +8271,18 @@ static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, if (!fp) return -ENOENT; - ret = ksmbd_vfs_fqar_lseek(fp, start, length, - qar_rsp, in_count, out_count); + if (!in_count) { + struct file_allocated_range_buffer range; + + ret = ksmbd_vfs_fqar_lseek(fp, start, length, &range, 1, + out_count); + if (!ret && *out_count) + ret = -ENOSPC; + *out_count = 0; + } else { + ret = ksmbd_vfs_fqar_lseek(fp, start, length, + qar_rsp, in_count, out_count); + } if (ret && ret != -E2BIG) *out_count = 0; -- 2.53.0