On Thu, Nov 9, 2023 at 1:11 AM Paulo Alcantara <pc@xxxxxxxxxxxxx> wrote: > > > 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 Ack. I'll try and get a repro locally and debug this one. -- Regards, Shyam
