Re: [Bugme-new] [Bug 32312] New: Race condition in umount

Re: [Bugme-new] [Bug 32312] New: Race condition in umount

[Andrew Morton]

(switched to email.  Please respond via emailed reply-to-all, not via the
bugzilla web interface).

On Thu, 31 Mar 2011 04:54:52 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=32312
> 
>            Summary: Race condition in umount
>            Product: File System
>            Version: 2.5
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: VFS
>         AssignedTo: fs_vfs@kernel-bugs.osdl.org
>         ReportedBy: fullung@gmail.com
>         Regression: No
> 
> 
> The Red Hat folks suggested reporting this bug here:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=683836
> 
> In summary, doing many umounts in parallel causes some umounts to fail and if
> the mount/parallel umount cycle is repeated a few times, bad stuff happens
> inside the kernel.
> 
> Reproduced with 2.6.38.*.
> 

Re: [Bugme-new] [Bug 32312] New: Race condition in umount

[Albert Strasheim]

Hello all

I was wondering if anyone has had a chance to review this issue?

Regards

Albert

On Thu, Mar 31, 2011 at 8:36 PM, Andrew Morton
<akpm@linux-foundation.org> wrote:
>
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
>
> On Thu, 31 Mar 2011 04:54:52 GMT
> bugzilla-daemon@bugzilla.kernel.org wrote:
>
>> https://bugzilla.kernel.org/show_bug.cgi?id=32312
>>
>>            Summary: Race condition in umount
>>            Product: File System
>>            Version: 2.5
>>           Platform: All
>>         OS/Version: Linux
>>               Tree: Mainline
>>             Status: NEW
>>           Severity: normal
>>           Priority: P1
>>          Component: VFS
>>         AssignedTo: fs_vfs@kernel-bugs.osdl.org
>>         ReportedBy: fullung@gmail.com
>>         Regression: No
>>
>>
>> The Red Hat folks suggested reporting this bug here:
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=683836
>>
>> In summary, doing many umounts in parallel causes some umounts to fail and if
>> the mount/parallel umount cycle is repeated a few times, bad stuff happens
>> inside the kernel.
>>
>> Reproduced with 2.6.38.*.
>>
>
>
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Re: [Bugme-new] [Bug 32312] New: Race condition in umount

[Jan Kara]

  Hi,

On Tue 26-04-11 14:37:56, Albert Strasheim wrote:
> I was wondering if anyone has had a chance to review this issue?
  I had a look into this and it should be fixed in 2.6.39-rc1. In
particular by commit 0aeea189.

								Honza
> On Thu, Mar 31, 2011 at 8:36 PM, Andrew Morton
> <akpm@linux-foundation.org> wrote:
> >
> > (switched to email.  Please respond via emailed reply-to-all, not via the
> > bugzilla web interface).
> >
> > On Thu, 31 Mar 2011 04:54:52 GMT
> > bugzilla-daemon@bugzilla.kernel.org wrote:
> >
> >> https://bugzilla.kernel.org/show_bug.cgi?id=32312
> >>
> >>            Summary: Race condition in umount
> >>            Product: File System
> >>            Version: 2.5
> >>           Platform: All
> >>         OS/Version: Linux
> >>               Tree: Mainline
> >>             Status: NEW
> >>           Severity: normal
> >>           Priority: P1
> >>          Component: VFS
> >>         AssignedTo: fs_vfs@kernel-bugs.osdl.org
> >>         ReportedBy: fullung@gmail.com
> >>         Regression: No
> >>
> >>
> >> The Red Hat folks suggested reporting this bug here:
> >>
> >> https://bugzilla.redhat.com/show_bug.cgi?id=683836
> >>
> >> In summary, doing many umounts in parallel causes some umounts to fail and if
> >> the mount/parallel umount cycle is repeated a few times, bad stuff happens
> >> inside the kernel.
> >>
> >> Reproduced with 2.6.38.*.
> >>
> >
> >
> --
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-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR
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