android_kernel_motorola_sm6375/kernel/cgroup
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Xiu Jianfeng 4f3e9217fb cgroup: Fix potential overflow issue when checking max_depth
[ Upstream commit 3cc4e13bb1617f6a13e5e6882465984148743cf4 ]

cgroup.max.depth is the maximum allowed descent depth below the current
cgroup. If the actual descent depth is equal or larger, an attempt to
create a new child cgroup will fail. However due to the cgroup->max_depth
is of int type and having the default value INT_MAX, the condition
'level > cgroup->max_depth' will never be satisfied, and it will cause
an overflow of the level after it reaches to INT_MAX.

Fix it by starting the level from 0 and using '>=' instead.

It's worth mentioning that this issue is unlikely to occur in reality,
as it's impossible to have a depth of INT_MAX hierarchy, but should be
be avoided logically.

Fixes: 1a926e0bba ("cgroup: implement hierarchy limits")
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-11-08 16:20:52 +01:00
..
cgroup-internal.h memcg: fix possible use-after-free in memcg_write_event_control() 2022-12-14 11:30:43 +01:00
cgroup-v1.c cgroup: Remove duplicates in cgroup v1 tasks file 2023-10-25 11:53:19 +02:00
cgroup.c cgroup: Fix potential overflow issue when checking max_depth 2024-11-08 16:20:52 +01:00
cpuset.c cgroup/cpuset: Prevent UAF in proc_cpuset_show() 2024-09-04 13:15:03 +02:00
debug.c
freezer.c
legacy_freezer.c
Makefile
namespace.c
pids.c
rdma.c
rstat.c