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azure: refcount_t overflow at xfrm_policy_lookup_bytype #2495
I observered kernel crash on 4.14.32-coreos which is running on a Azure VM.
Container Linux Version
CoreOS running on Azure VM.
Don't know how to repro
Thanks for reporting this. By your kernel version, it looks like you may be running an older stable release (likely 1688.5.3). Can you confirm which OS version you are on, and if you hit the same behavior on latest stable and alpha?
Also, are you using any custom network configuration/tweaks? The trace seems to hint at a resource leak in a refcounted network object.
changed the title from
CoreOS 4.14.32 crashed at "xfrm_policy_lookup_bytype"
azure: refcount_t overflow at xfrm_policy_lookup_bytype
Aug 16, 2018
Thanks for looking into that, below is the os version:
And the VM is running in Azure, no specified network configurations as far as I know. As you mentioned, there would be resource leak, is there any further information we could check?
The os-release reported here (1688.5.3, shipping with kernel 4.14.32) does not match the kernel version in the panic log (
The resource leak seems to be related to ip-xfrm policies (i.e. likely some tunneled/encrypted interface). It may be possible to observe the effects of it via