From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 5F6771945E for ; Wed, 8 Nov 2023 19:41:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=manguebit.com header.i=@manguebit.com header.b="jT+c4W7M" Received: from mx.manguebit.com (mx.manguebit.com [167.235.159.17]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 14040211B for ; Wed, 8 Nov 2023 11:41:05 -0800 (PST) Message-ID: <147809311fa1593993c7852e32fa52fd.pc@manguebit.com> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=manguebit.com; s=dkim; t=1699472463; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=FQKGVpUiF1mpGEKJ24/XP7V2zEfiT2wTo0saMsGm4lI=; b=jT+c4W7MaOW7e5XyeIoPinzfANk6VYN8EJs3v349PsqQGLm9gxpmM8bLRGXNo2b/ULj7mL uQ9BuCjcJXsXRgUIaW8MtJg+VpriWA8Ax00+E80l0Ls9MoQHs27sMNH3a1cWgw0SoNN9Zx 8Z4WtJGg1ZMLbU42Mh/uhC7ZL2B2oDBvR3+Yvltz8w7sTeVvUrEqZfvISMTDRDNIWrW88z Iv/OrAaOGNTTXolVCta8Aiwt8PgheRiRJSD23sMGrUx9C96o9u7tBpKRmUmgtXKzviPuCb G+d6HIW8c+mLjwm8rUxo/cvuaoUg5t5xkS/Cd7ybsf168B4Pv548mKxvDjX51g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=manguebit.com; s=dkim; t=1699472463; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=FQKGVpUiF1mpGEKJ24/XP7V2zEfiT2wTo0saMsGm4lI=; b=h8IYCxOQJgi9PWvmYhp77nWxA4sagnFtzxA+QxOIXQypUAIqB8fuEsrwRPNVTu9UBZloVf n0Ke7RIaZpJLT+GaK5OefCSmKjXGWlrGxJus17nJUZtLGuD2fqu1y5ZnX0gXq0bi3E41en rqWTTdbU8jy58ZMXHTWVnjqa6vo2rqemJwC0kMRg6W/lt5h8T4+ttCz0G0ZD9pe/51Zowk tCIKK+PJT1oop/b2whAiswkY53ykxRsXqFqneCooqM3AH0T0H01Hkj3jKWmVly1QqaoZTV phx9bFZeirQkZ8h59WWcEJO8hN8d4YCHz3srDSbXPj0pMjGf685H+IkAaZ/YPw== ARC-Authentication-Results: i=1; ORIGINATING; auth=pass smtp.auth=pc@manguebit.com smtp.mailfrom=pc@manguebit.com ARC-Seal: i=1; s=dkim; d=manguebit.com; t=1699472463; a=rsa-sha256; cv=none; b=rKxa0sHa6b8ja8daIbbdOxQx0nrTVRm5+8NkPnw4OUElTbtyT9ixVcOkJL4PmBnNbbz52k r1jDUBdhh0tS8r5qX4Qes0fhQzXRiYmGDNtfYWndOWWlgWEHWqDcdvBkXqWlmX44/V62X0 Im0tVjzD1gSrwQ2ZImN2PMBhdlYPyirdVki3W4DxCIL8zdrCNZZKrMGQERVyHxBhF53NEU 73jAN0DRK7q6+Z3Mt77tV5x/kQTmFFLAgOgj92hO+Xjr55qEqdsqM1+rTlvzg6pn9tescB 9Awt49StmtD5amg/o0KcTncQMsqIEXVXUYf7hQ9sL06YYjyf9B4WwoGnPOTn/A== From: Paulo Alcantara To: nspmangalore@gmail.com, smfrench@gmail.com, bharathsm.hsk@gmail.com, linux-cifs@vger.kernel.org Cc: Shyam Prasad N Subject: Re: [PATCH 12/14] cifs: handle when server stops supporting multichannel In-Reply-To: <5890a4eec52f50b271ba8188f1ace1c9.pc@manguebit.com> References: <20231030110020.45627-1-sprasad@microsoft.com> <20231030110020.45627-12-sprasad@microsoft.com> <5890a4eec52f50b271ba8188f1ace1c9.pc@manguebit.com> Date: Wed, 08 Nov 2023 16:41:00 -0300 Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain > and leaked server connections > > Display Internal CIFS Data Structures for Debugging > --------------------------------------------------- > CIFS Version 2.46 > Features: DFS,FSCACHE,STATS2,DEBUG2,ALLOW_INSECURE_LEGACY,CIFS_POSIX,UPCALL(SPNEGO),XATTR,ACL,WITNESS > CIFSMaxBufSize: 16384 > Active VFS Requests: 0 > > Servers: > 1) ConnectionId: 0x70e Hostname: w22-root2.gandalf.test > ClientGUID: 44DAE383-3E91-3042-85FE-87D6F17298B7 > Number of credits: 1,1,1 Dialect 0x210 > Server capabilities: 0x300007 > TCP status: 4 Instance: 77 > Local Users To Server: 1 SecMode: 0x1 Req On Wire: 0 Net namespace: 4026531840 > In Send: 0 In MaxReq Wait: 0 > DFS leaf full path: \\W22-ROOT1.GANDALF.TEST\dfstest3\link10 > > Sessions: > [NONE] > 2) ConnectionId: 0x706 Hostname: w22-root2.gandalf.test > ClientGUID: C8CF45E4-F70D-DF40-8821-0234A2E20DD4 > Number of credits: 1,1,1 Dialect 0x210 > Server capabilities: 0x300007 > TCP status: 4 Instance: 81 > Local Users To Server: 1 SecMode: 0x1 Req On Wire: 0 Net namespace: 4026531840 > In Send: 0 In MaxReq Wait: 0 > DFS leaf full path: \\W22-ROOT1.GANDALF.TEST\dfstest3\link6 > > Sessions: > [NONE] > 3) ConnectionId: 0x6ae Hostname: w22-root1.gandalf.test > ClientGUID: AB059CDD-12FF-B94D-B30C-9E1928ACBA95 > Number of credits: 1,1,1 Dialect 0x210 > Server capabilities: 0x300007 > TCP status: 4 Instance: 96 > Local Users To Server: 1 SecMode: 0x1 Req On Wire: 0 Net namespace: 4026531840 > In Send: 0 In MaxReq Wait: 0 > DFS leaf full path: \\W22-ROOT1.GANDALF.TEST\dfstest3\link9 > > Sessions: > [NONE] > ... I ended up with a simple reproducer for the above mount.cifs //srv/share /mnt/1 -o ...,echo_interval=10 iptables -I INPUT -s $srvaddr -j DROP stat -f /mnt/1 # check dmesg for "BUG: sleeping function called from invalid context" iptables -I INPUT -s $srvaddr -j ACCEPT stat -f /mnt/1 umount /mnt/1 # check /proc/fs/cifs/DebugData for leaked server connection