Re: [PATCH] mm: fix null pointer dereference in mem_cgroup_protected

2018-06-11 Thread Johannes Weiner
On Fri, Jun 08, 2018 at 06:06:07PM +0100, Roman Gushchin wrote: > Shakeel reported a crash in mem_cgroup_protected(), which > can be triggered by memcg reclaim if the legacy cgroup v1 > use_hierarchy=0 mode is used: ... > Reported-by: Shakeel Butt > Signed-off-by: Roman Gushchin > Cc: Johannes We

Re: [PATCH] mm: fix null pointer dereference in mem_cgroup_protected

2018-06-11 Thread Michal Hocko
On Fri 08-06-18 18:06:07, Roman Gushchin wrote: > Shakeel reported a crash in mem_cgroup_protected(), which > can be triggered by memcg reclaim if the legacy cgroup v1 > use_hierarchy=0 mode is used: > > [ 226.060572] BUG: unable to handle kernel NULL pointer dereference > at 0120 > [

Re: [PATCH] mm: fix null pointer dereference in mem_cgroup_protected

2018-06-08 Thread Shakeel Butt
On Fri, Jun 8, 2018 at 10:06 AM Roman Gushchin wrote: > > Shakeel reported a crash in mem_cgroup_protected(), which > can be triggered by memcg reclaim if the legacy cgroup v1 > use_hierarchy=0 mode is used: > > [ 226.060572] BUG: unable to handle kernel NULL pointer dereference > at

[PATCH] mm: fix null pointer dereference in mem_cgroup_protected

2018-06-08 Thread Roman Gushchin
Shakeel reported a crash in mem_cgroup_protected(), which can be triggered by memcg reclaim if the legacy cgroup v1 use_hierarchy=0 mode is used: [ 226.060572] BUG: unable to handle kernel NULL pointer dereference at 0120 [ 226.068310] PGD 801ff55da067 P4D 801ff55da067 PUD 1f