Ubuntu
linux package

  1. Cosmic (18.10)
  2. Bug #1795659
  3. Comment #0

Comment 0 for bug 1795659

Revision history for this message
Stefan Stranz (sfs1988) wrote : kernel panic using CIFS share smb2_push_mandatory_locks

Description: Ubuntu 16.04.5 LTS
Release: 16.04

Kernel: 4.15.0-36-generic #39~16.04.1-Ubuntu SMP Tue Sep 25 08:59:23 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Under load, getting a system crash when accessing files on an SMB3 share. dmesg from crash attached. I can upload the crash dump if needed.

Share is mounted with the following options:

"ro,_netdev,username=*****,password=*****,domain=*****,vers=3.02,sec=ntlmsspi,nounix,noserverino,nobrl,cache=none"

Dmesg points to the cifs module

[ 2192.662345] BUG: unable to handle kernel NULL pointer dereference at 0000000000000038
[ 2192.662407] IP: smb2_push_mandatory_locks+0x10e/0x3b0 [cifs]