linux-kernel - Re: [PATCH v2 1/1] smb: client: Fix hang in smb2

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Message-ID: <f0053de6-d96a-99b1-cb10-25a15f676cf6@axis.com>
Date: Mon, 15 Apr 2024 14:05:43 +0200
From: Rickard x Andersson <rickaran@...s.com>
To: Steve French <smfrench@...il.com>
Cc: CIFS <linux-cifs@...r.kernel.org>,
 samba-technical <samba-technical@...ts.samba.org>,
 Steve French <sfrench@...ba.org>, Paulo Alcantara <pc@...guebit.com>,
 ronnie sahlberg <ronniesahlberg@...il.com>,
 Shyam Prasad N <sprasad@...rosoft.com>, Tom Talpey <tom@...pey.com>,
 LKML <linux-kernel@...r.kernel.org>, rickard314.andersson@...il.com,
 kernel <kernel@...s.com>
Subject: Re: [PATCH v2 1/1] smb: client: Fix hang in smb2_reconnect

On 4/13/24 21:40, Steve French wrote:
> Is there any way to verify if the same problem can be reproduced with 
> 6.9-rc3 or later


I have now reproduced the problem also on 6.9.0-rc3:


  INFO: task umount:511 blocked for more than 614 seconds.
        Not tainted 6.9.0-rc3-axis9-devel #1
  "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  task:umount          state:D stack:0     pid:511   tgid:511   ppid:509 
    flags:0x00000004
  Call trace:
   __schedule from schedule+0x34/0x14c
   schedule from schedule_preempt_disabled+0x24/0x34
  schedule_preempt_disabled from __mutex_lock.constprop.0+0x330/0x8b0
   __mutex_lock.constprop.0 from smb2_reconnect+0x114/0x8fc [cifs]
   smb2_reconnect [cifs] from SMB2_open_init+0x58/0xa5c [cifs]
   SMB2_open_init [cifs] from smb2_query_info_compound+0x1a4/0x50c [cifs]
   smb2_query_info_compound [cifs] from smb2_queryfs+0x64/0x134 [cifs]
   smb2_queryfs [cifs] from cifs_statfs+0xc8/0x318 [cifs]
   cifs_statfs [cifs] from statfs_by_dentry+0x60/0x84
   statfs_by_dentry from fd_statfs+0x30/0x74
   fd_statfs from sys_fstatfs64+0x40/0x6c
   sys_fstatfs64 from ret_fast_syscall+0x0/0x54
  Exception stack(0xc749ffa8 to 0xc749fff0)
  ffa0:                   01716218 00000000 00000003 00000058 beb62b90 
00000000
  ffc0: 01716218 00000000 00000003 0000010b b6fbd138 01716448 017162a4 
beb62b90
  ffe0: 0000010b beb62ad4 b6f0861f b6e87866


Best regards,
Rickard