Messages in this thread | | | Subject | Re: Bug 4.1.16: self-detected stall in net/unix/? | From | Hannes Frederic Sowa <> | Date | Wed, 3 Feb 2016 02:43:14 +0100 |
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On 02.02.2016 17:25, Philipp Hahn wrote: > Hi, > > we recently updated our kernel to 4.1.16 + patch for "unix: properly > account for FDs passed over unix sockets" and have since then > self-detected stalls triggered by the Samba daemon: > > > > > [...] > > > > We have not yet been able to reproduce the hang, but going back to our > previous kernel 4.1.12 makes the problem go away.
Can you remove the patch "unix: properly account for FDs passed over unix sockets" and see if the problem still happens?
I couldn't quickly see any problems with your added patch. I currently suspect a tight loop because of a SOCK_DEAD flag set but the socket not removed from unix_socket_table or the vfs. Hmmm...
The stack trace is rather unreliable, maybe something completely different happend. Do you happend to see better reports?
> Is this a known issue or do you have an idea where to look? > What information should I collect next time it happens? > > (Can unix_diag.ko with `ss` help?)
Would be interesting if it is a conventional file based socket or autobounded one (sun_path[0] != '\0').
Thanks, Hannes
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