Kernel memory leak introduced with recent 3.13 updates? Machine hangs with out of memory after about 2 days.

Asked by pg

I have a Ubuntu 12.04.5 LTS running in a Hyper-V VM for several years.
Since I updated the system a few days ago to Linux 3.13.0-68-generic x86_64, the machine hangs
with out of memory after about 2 days of uptime.

With the kernel from July (3.13.0-4?-generic x86_64 or 3.13.0-5? - I don't remember) there was no problem
running the machine several month without interruption.

I'm currently monitoring /proc/meminfo and /proc/slabinfo and can sea a steady increase of
Slab in meminfo.

I also have a second VM without showing the problem. The VM with the leak is used as internet
router and firewall. Two things apply to the VM the the other does not have:
- vsftpd is running, some files are downloaded from the machine every few minutes
- there is a "tcpdump -i eth0 -s 65535 -C 100 -W 1000000000 -w /somefile" running all the time

Is there anything I can do to get a stable system again? I'm thinking of downgrading until
the problem is fixed.

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pg (pg-ubuntu) said :

Memory data:
Slab: 100752 kB
and 2 hours later:
Slab: 104964 kB

In slabinfo, kmalloc-512 is increasing.

If there is a way to post files, I could upload the full files.

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actionparsnip (andrew-woodhead666) said :

I suggest you report a bug. There is a feature there to add files too.

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pg (pg-ubuntu) said :

Is there anything I can do to make somebody looking at the reported bug:
Is the package correct?

Can you help with this problem?

Provide an answer of your own, or ask pg for more information if necessary.

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