Aurélien Aptel <aaptel@xxxxxxxx> writes: > Martijn de Gouw <martijn.de.gouw@xxxxxxxxxxxxxxxxxxxxxxxxx> writes: >> Our Linux VMs reports call traces about processes being stuck. >> I've attached the full dmesg of one of the call traces below. >> >> The machine is running kernel 5.3.1 SMP. All mounts are mounted via the >> dfs shares on our domain controller and have the following options in fstab: >> nohandlecache,multiuser,sec=krb5,noperm,user=xxxx,file_mode=0600,dir_mode=0700,vers=3.0 > > It looks like its DFS related. The DFS cache code takes the reconnect > mutex and crashes with no chance to give back the mutex, making all > other process hang while waiting for it. Yeah, makes sense. Martijn, Could you please provide us with some debug logs with the following: # echo 'module cifs +p' > /sys/kernel/debug/dynamic_debug/control # echo 'file fs/cifs/* +p' > /sys/kernel/debug/dynamic_debug/control # echo 1 > /proc/fs/cifs/cifsFYI # echo 1 > /sys/module/dns_resolver/parameters/debug Besides, if you could also enable KASAN, that would be great. Thanks, Paulo
