* BUG: sleeping function called from invalid context in console_lock
[not found] <42c2c0c4-9ee2-6426-8c3c-2585e0345fcb@huawei.com>
@ 2023-09-18 13:35 ` yiyang (D)
2023-09-18 15:19 ` Greg Kroah-Hartman
0 siblings, 1 reply; 6+ messages in thread
From: yiyang (D) @ 2023-09-18 13:35 UTC (permalink / raw)
To: Greg Kroah-Hartman, Jiri Slaby, hedonistsmith, daniel.starke; +Cc: linux-serial
In recent years, this problem has been reported in syzkaller all the time.
Link: https://syzkaller.appspot.com/bug?extid=dbac96d8e73b61aa559c
Historically, the developers have tried to fix this problem by use mutex
instead spinlock, but it didn't solve the problem..
Link: https://lore.kernel.org/all/20220826193545.20363-1-pchelkin@ispras.ru/
Other developers have recently reported this problem, but no one has
continued to try to fix it.
Link:
https://lore.kernel.org/all/20230420082153.6711-1-daniel.starke@siemens.com/
Anyway, do we have any ideas for solving this problem?
--
yiyang
.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: BUG: sleeping function called from invalid context in console_lock
2023-09-18 13:35 ` BUG: sleeping function called from invalid context in console_lock yiyang (D)
@ 2023-09-18 15:19 ` Greg Kroah-Hartman
2023-09-27 7:48 ` yiyang (D)
2023-09-27 9:15 ` yiyang (D)
0 siblings, 2 replies; 6+ messages in thread
From: Greg Kroah-Hartman @ 2023-09-18 15:19 UTC (permalink / raw)
To: yiyang (D); +Cc: Jiri Slaby, hedonistsmith, daniel.starke, linux-serial
On Mon, Sep 18, 2023 at 09:35:23PM +0800, yiyang (D) wrote:
> In recent years, this problem has been reported in syzkaller all the time.
>
> Link: https://syzkaller.appspot.com/bug?extid=dbac96d8e73b61aa559c
>
> Historically, the developers have tried to fix this problem by use mutex
> instead spinlock, but it didn't solve the problem..
>
> Link: https://lore.kernel.org/all/20220826193545.20363-1-pchelkin@ispras.ru/
>
> Other developers have recently reported this problem, but no one has
> continued to try to fix it.
>
> Link:
> https://lore.kernel.org/all/20230420082153.6711-1-daniel.starke@siemens.com/
>
> Anyway, do we have any ideas for solving this problem?
Nope! Why do you think this is something that even needs to be
addressed?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: BUG: sleeping function called from invalid context in console_lock
2023-09-18 15:19 ` Greg Kroah-Hartman
@ 2023-09-27 7:48 ` yiyang (D)
2023-09-27 8:24 ` Greg Kroah-Hartman
2023-09-27 9:15 ` yiyang (D)
1 sibling, 1 reply; 6+ messages in thread
From: yiyang (D) @ 2023-09-27 7:48 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Jiri Slaby, hedonistsmith, daniel.starke, linux-serial
On 2023/9/18 23:19, Greg Kroah-Hartman wrote:
> On Mon, Sep 18, 2023 at 09:35:23PM +0800, yiyang (D) wrote:
>> In recent years, this problem has been reported in syzkaller all the time.
>>
>> Link: https://syzkaller.appspot.com/bug?extid=dbac96d8e73b61aa559c
>>
>> Historically, the developers have tried to fix this problem by use mutex
>> instead spinlock, but it didn't solve the problem..
>>
>> Link: https://lore.kernel.org/all/20220826193545.20363-1-pchelkin@ispras.ru/
>>
>> Other developers have recently reported this problem, but no one has
>> continued to try to fix it.
>>
>> Link:
>> https://lore.kernel.org/all/20230420082153.6711-1-daniel.starke@siemens.com/
>>
>> Anyway, do we have any ideas for solving this problem?
>
> Nope! Why do you think this is something that even needs to be
> addressed?
> .
>
Kernel only perform cannot sleep operations in atomic context, as
otherwise a system hang or crash may occur.
So there's a risk to this problem.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: BUG: sleeping function called from invalid context in console_lock
2023-09-27 7:48 ` yiyang (D)
@ 2023-09-27 8:24 ` Greg Kroah-Hartman
0 siblings, 0 replies; 6+ messages in thread
From: Greg Kroah-Hartman @ 2023-09-27 8:24 UTC (permalink / raw)
To: yiyang (D); +Cc: Jiri Slaby, hedonistsmith, daniel.starke, linux-serial
On Wed, Sep 27, 2023 at 03:48:33PM +0800, yiyang (D) wrote:
> On 2023/9/18 23:19, Greg Kroah-Hartman wrote:
> > On Mon, Sep 18, 2023 at 09:35:23PM +0800, yiyang (D) wrote:
> > > In recent years, this problem has been reported in syzkaller all the time.
> > >
> > > Link: https://syzkaller.appspot.com/bug?extid=dbac96d8e73b61aa559c
> > >
> > > Historically, the developers have tried to fix this problem by use mutex
> > > instead spinlock, but it didn't solve the problem..
> > >
> > > Link: https://lore.kernel.org/all/20220826193545.20363-1-pchelkin@ispras.ru/
> > >
> > > Other developers have recently reported this problem, but no one has
> > > continued to try to fix it.
> > >
> > > Link:
> > > https://lore.kernel.org/all/20230420082153.6711-1-daniel.starke@siemens.com/
> > >
> > > Anyway, do we have any ideas for solving this problem?
> >
> > Nope! Why do you think this is something that even needs to be
> > addressed?
> > .
> >
> Kernel only perform cannot sleep operations in atomic context, as otherwise
> a system hang or crash may occur.
>
> So there's a risk to this problem.
>
Have you see this risk in real workloads? If so, great, please provide
a working solution that is tested and verified to work properly.
good luck!
greg k-h
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: BUG: sleeping function called from invalid context in console_lock
2023-09-18 15:19 ` Greg Kroah-Hartman
2023-09-27 7:48 ` yiyang (D)
@ 2023-09-27 9:15 ` yiyang (D)
2023-09-27 9:41 ` Greg Kroah-Hartman
1 sibling, 1 reply; 6+ messages in thread
From: yiyang (D) @ 2023-09-27 9:15 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Jiri Slaby, hedonistsmith, daniel.starke, linux-serial
On 2023/9/18 23:19, Greg Kroah-Hartman wrote:
> On Mon, Sep 18, 2023 at 09:35:23PM +0800, yiyang (D) wrote:
>> In recent years, this problem has been reported in syzkaller all the time.
>>
>> Link: https://syzkaller.appspot.com/bug?extid=dbac96d8e73b61aa559c
>>
>> Historically, the developers have tried to fix this problem by use mutex
>> instead spinlock, but it didn't solve the problem..
>>
>> Link: https://lore.kernel.org/all/20220826193545.20363-1-pchelkin@ispras.ru/
>>
>> Other developers have recently reported this problem, but no one has
>> continued to try to fix it.
>>
>> Link:
>> https://lore.kernel.org/all/20230420082153.6711-1-daniel.starke@siemens.com/
>>
>> Anyway, do we have any ideas for solving this problem?
>
> Nope! Why do you think this is something that even needs to be
> addressed?
> .
>
This problem seems to be a CVE problem.
https://nvd.nist.gov/vuln/detail/CVE-2023-31082
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: BUG: sleeping function called from invalid context in console_lock
2023-09-27 9:15 ` yiyang (D)
@ 2023-09-27 9:41 ` Greg Kroah-Hartman
0 siblings, 0 replies; 6+ messages in thread
From: Greg Kroah-Hartman @ 2023-09-27 9:41 UTC (permalink / raw)
To: yiyang (D); +Cc: Jiri Slaby, hedonistsmith, daniel.starke, linux-serial
On Wed, Sep 27, 2023 at 05:15:25PM +0800, yiyang (D) wrote:
> On 2023/9/18 23:19, Greg Kroah-Hartman wrote:
> > On Mon, Sep 18, 2023 at 09:35:23PM +0800, yiyang (D) wrote:
> > > In recent years, this problem has been reported in syzkaller all the time.
> > >
> > > Link: https://syzkaller.appspot.com/bug?extid=dbac96d8e73b61aa559c
> > >
> > > Historically, the developers have tried to fix this problem by use mutex
> > > instead spinlock, but it didn't solve the problem..
> > >
> > > Link: https://lore.kernel.org/all/20220826193545.20363-1-pchelkin@ispras.ru/
> > >
> > > Other developers have recently reported this problem, but no one has
> > > continued to try to fix it.
> > >
> > > Link:
> > > https://lore.kernel.org/all/20230420082153.6711-1-daniel.starke@siemens.com/
> > >
> > > Anyway, do we have any ideas for solving this problem?
> >
> > Nope! Why do you think this is something that even needs to be
> > addressed?
> > .
> >
> This problem seems to be a CVE problem.
> https://nvd.nist.gov/vuln/detail/CVE-2023-31082
If you think CVEs are actually valid for the kernel (hint, they aren't),
then wonderful, please work to resolve this issue.
Again, good luck!
greg k-h
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2023-09-27 9:41 UTC | newest]
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[not found] <42c2c0c4-9ee2-6426-8c3c-2585e0345fcb@huawei.com>
2023-09-18 13:35 ` BUG: sleeping function called from invalid context in console_lock yiyang (D)
2023-09-18 15:19 ` Greg Kroah-Hartman
2023-09-27 7:48 ` yiyang (D)
2023-09-27 8:24 ` Greg Kroah-Hartman
2023-09-27 9:15 ` yiyang (D)
2023-09-27 9:41 ` Greg Kroah-Hartman
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