Due to https://bugs.launchpad.net/ubuntu/+source/apport/+bug/997020 I
switched this to 'Confirmed'.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1756337
Title:
kernel bug at fscache/operation.c
Status in MAAS:
Invalid
Status in linux package in Ubuntu:
Confirmed
Bug description:
MAAS deployed Ubuntu 16.04 LTS hosts began suffering from either
[577275.774627] FS-Cache:
[577275.777530] FS-Cache: Assertion failed
[577275.781945] FS-Cache: 6 == 5 is false
[577275.786304] ------------[ cut here ]------------
[577275.791662] kernel BUG at
/build/linux-Fk60NP/linux-4.10.0/fs/fscache/operation.c:494!
[577275.800740] invalid opcode: 0000 [#1] SMP
[577275.805415] Modules linked in: vhost_net vhost macvtap macvlan
nf_conntrack_ipv6 nf_defrag_ipv6 xt_physdev br_netfilter ip_set nfnetlink
rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace sunrpc cachefiles fscache $
[577275.885578] ib_core configfs iscsi_tcp libiscsi_tcp libiscsi
scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0
multipa$
[577275.925771] CPU: 52 PID: 39395 Comm: kworker/u161:1 Not tainted
4.10.0-19-generic #21-Ubuntu
[577275.940896] Hardware name: Dell Inc. PowerEdge R430/0CN7X8, BIOS 2.6.0
10/31/2017
or
[126530.552030] FS-Cache:
[126530.554868] FS-Cache: Assertion failed
[126530.559250] FS-Cache: 1 > 0 is false
[126530.563472] ------------[ cut here ]------------
[126530.568822] kernel BUG at
/build/linux-Fk60NP/linux-4.10.0/fs/fscache/operation.c:68!
[126530.577792] invalid opcode: 0000 [#1] SMP
[126530.582464] Modules linked in: vhost_net vhost macvtap macvlan
nf_conntrack_ipv6 nf_defrag_ipv6 xt_physdev br_netfilter ip_set nfnetlink
rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace sunrpc cachefiles fscache $
[126530.662615] libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs
raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor
raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul $
[126530.700165] CPU: 6 PID: 13971 Comm: CPU 1/KVM Not tainted
4.10.0-19-generic #21-Ubuntu
[126530.709227] Hardware name: Dell Inc. PowerEdge R430/0CN7X8, BIOS 2.7.1
01/26/2018
Possible solution here: https://patchwork.kernel.org/patch/10234815/
Using MAAS: MAAS version: 2.2.2 (6099-g8751f91-0ubuntu1~16.04.1)
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