From: Vasily Averin <vvs@openvz.org>
To: Qian Cai <quic_qiancai@quicinc.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Shakeel Butt <shakeelb@google.com>
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
kernel@openvz.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, "Michal Koutný" <mkoutny@suse.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Michal Hocko" <mhocko@suse.com>,
"Florian Westphal" <fw@strlen.de>,
"David S. Miller" <davem@davemloft.net>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"Eric Dumazet" <edumazet@google.com>,
cgroups@vger.kernel.org
Subject: Re: [PATCH memcg v6] net: set proper memcg for net_init hooks allocations
Date: Mon, 6 Jun 2022 21:45:50 +0300 [thread overview]
Message-ID: <360a2672-65a7-4ad4-c8b8-cc4c1f0c02cd@openvz.org> (raw)
In-Reply-To: <Yp4F6n2Ie32re7Ed@qian>
On 6/6/22 16:49, Qian Cai wrote:
> On Fri, Jun 03, 2022 at 07:19:43AM +0300, Vasily Averin wrote:
> This triggers a few boot warnings like those.
>
> virt_to_phys used for non-linear address: ffffd8efe2d2fe00 (init_net)
> WARNING: CPU: 87 PID: 3170 at arch/arm64/mm/physaddr.c:12 __virt_to_phys
...
> Call trace:
> __virt_to_phys
> mem_cgroup_from_obj
> __register_pernet_operations
@@ -1143,7 +1144,13 @@ static int __register_pernet_operations(struct list_head *list,
* setup_net() and cleanup_net() are not possible.
*/
for_each_net(net) {
+ struct mem_cgroup *old, *memcg;
+
+ memcg = mem_cgroup_or_root(get_mem_cgroup_from_obj(net)); <<<< Here
+ old = set_active_memcg(memcg);
error = ops_init(ops, net);
+ set_active_memcg(old);
+ mem_cgroup_put(memcg);
...
+static inline struct mem_cgroup *get_mem_cgroup_from_obj(void *p)
+{
+ struct mem_cgroup *memcg;
+
+ rcu_read_lock();
+ do {
+ memcg = mem_cgroup_from_obj(p); <<<<
+ } while (memcg && !css_tryget(&memcg->css));
...
struct mem_cgroup *mem_cgroup_from_obj(void *p)
{
struct folio *folio;
if (mem_cgroup_disabled())
return NULL;
folio = virt_to_folio(p); <<<< here
...
static inline struct folio *virt_to_folio(const void *x)
{
struct page *page = virt_to_page(x); <<< here
... (arm64)
#define virt_to_page(x) pfn_to_page(virt_to_pfn(x))
...
#define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys((unsigned long)(x)))
...
phys_addr_t __virt_to_phys(unsigned long x)
{
WARN(!__is_lm_address(__tag_reset(x)),
"virt_to_phys used for non-linear address: %pK (%pS)\n",
from arch/x86/include/asm/page.h:
* virt_to_page(kaddr) returns a valid pointer if and only if
* virt_addr_valid(kaddr) returns true.
As far as I understand this report means that 'init_net' have incorrect
virtual address on arm64.
Roman, Shakeel, I need your help
Should we perhaps verify kaddr via virt_addr_valid() before using virt_to_page()
If so, where it should be checked?
Thank you,
Vasily Averin
next prev parent reply other threads:[~2022-06-06 18:46 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-28 7:17 [PATCH RFC] net: memcg accounting for veth devices Vasily Averin
2022-02-28 14:36 ` Luis Chamberlain
2022-03-01 18:09 ` Shakeel Butt
2022-03-01 18:28 ` Luis Chamberlain
2022-03-01 20:50 ` Eric W. Biederman
2022-03-01 21:25 ` Luis Chamberlain
2022-03-01 21:31 ` Luis Chamberlain
2022-03-02 14:43 ` Eric W. Biederman
2022-03-02 21:52 ` Luis Chamberlain
2022-03-02 13:30 ` King, Colin
2022-04-11 9:40 ` problem with accounting of allocations called from __net_init hooks Vasily Averin
2022-04-17 6:39 ` [PATCH memcg RFC] net: set proper memcg for net_init hooks allocations Vasily Averin
2022-04-21 15:56 ` Shakeel Butt
2022-04-22 20:01 ` Vasily Averin
2022-04-22 20:09 ` Vasily Averin
2022-04-22 20:22 ` Shakeel Butt
2022-04-23 7:56 ` [PATCH] " Vasily Averin
2022-04-23 9:39 ` kernel test robot
2022-04-23 9:39 ` kernel test robot
2022-04-23 10:31 ` kernel test robot
2022-04-23 15:38 ` [PATCH memcg v2] " Vasily Averin
2022-04-24 14:46 ` [net] 3b379e5391: BUG:kernel_NULL_pointer_dereference,address kernel test robot
2022-04-25 10:56 ` [PATCH memcg v3] net: set proper memcg for net_init hooks allocations Vasily Averin
2022-04-26 2:50 ` Roman Gushchin
2022-04-26 5:58 ` Vasily Averin
2022-04-26 6:43 ` [PATCH memcg v4] " Vasily Averin
2022-04-26 22:13 ` Roman Gushchin
2022-04-27 5:23 ` Shakeel Butt
2022-04-27 12:22 ` Michal Koutný
2022-04-27 15:06 ` Shakeel Butt
2022-04-27 22:16 ` Vasily Averin
2022-04-27 22:36 ` Roman Gushchin
2022-04-28 4:37 ` Vasily Averin
2022-04-27 22:47 ` Shakeel Butt
2022-05-01 13:44 ` Vasily Averin
2022-05-01 21:09 ` Roman Gushchin
2022-05-02 0:10 ` [PATCH memcg v5] " Vasily Averin
2022-05-30 8:57 ` Vasily Averin
2022-06-03 4:19 ` [PATCH memcg v6] " Vasily Averin
2022-06-06 13:49 ` Qian Cai
2022-06-06 17:37 ` Vasily Averin
2022-06-06 18:43 ` Qian Cai
2022-06-06 18:45 ` Vasily Averin [this message]
2022-06-07 5:58 ` Shakeel Butt
2022-06-07 12:37 ` Vasily Averin
2022-06-07 14:10 ` Shakeel Butt
2022-09-18 9:28 ` [sparc64] fails to boot, (was: Re: [PATCH memcg v6] net: set proper memcg for net_init hooks allocations) Anatoly Pugachev
2022-09-21 14:44 ` Anatoly Pugachev
2022-09-21 17:02 ` Michal Koutný
2022-09-26 13:06 ` Anatoly Pugachev
2022-09-26 17:28 ` Jakub Kicinski
2022-09-26 17:32 ` Shakeel Butt
2022-09-26 17:36 ` Andrew Morton
2022-09-26 19:00 ` Shakeel Butt
2022-09-27 9:54 ` Vlastimil Babka
2022-09-28 7:54 ` Thorsten Leemhuis
2022-09-28 7:21 ` [sparc64] fails to boot, (was: Re: [PATCH memcg v6] net: set proper memcg for net_init hooks allocations) #forregzbot Thorsten Leemhuis
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