* 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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