On 03/13/2018 02:41 PM, Timofey Titovets wrote:
We currently upgrade our servers from 4.14.13 to 4.14.26
And get some problems with random kernel oops by:
[ 422.081094] BUG: unable to handle kernel NULL pointer dereference
[ 422.081254] IP: tcp_push+0x42/0x110
[ 422.081314] PGD 0 P4D 0
[ 422.081364] Oops: 0002 [#1] SMP PTI
Currently we assume that this caused by:
net: tcp: close sock if net namespace is exiting
[ Upstream commit 4ee806d51176ba7b8ff1efd81f271d7252e03a1d ]
If that can helps we heavy use docker and ceph rbd.
I will write if we get more info or fix that.
Can you provide a full stack trace ?