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New: 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113

Bug 19642 [email protected] 3 participants 6 messages Oct 3, 2010

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#0 lore raw

https://bugzilla.kernel.org/show_bug.cgi?id=19642

           Summary: 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 2.6.36-rc6
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: SCSI
        AssignedTo: [email protected]
        ReportedBy: [email protected]
                CC: [email protected], [email protected],
                    [email protected]
        Regression: Yes

Subject : 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113
Submitter : "George Spelvin" <[email protected]>
Date : 2010-09-30 21:10
Message-ID : [email protected] References : http://marc.info/?l=linux-kernel&m=128588102620299&w=2

This entry is being used for tracking a regression from 2.6.35. Please don't close it until the problem is fixed in the mainline.

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#1 lore raw

[Bug 19642] 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113

https://bugzilla.kernel.org/show_bug.cgi?id=19642

Maciej Rutecki <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

             Blocks|                            |16444
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#2 lore raw
In reply to [email protected]
Quoted 14 lines · On Sun, 2010-10-03 at 18:37 +0000, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=19642

           Summary: 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 2.6.36-rc6
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: SCSI
        AssignedTo: [email protected]

I think this is wrong.

Quoted 11 lines

ReportedBy: [email protected]
CC: [email protected], [email protected],
[email protected]
Regression: Yes

Subject : 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113
Submitter : "George Spelvin" <[email protected]>
Date : 2010-09-30 21:10
Message-ID : [email protected] References : http://marc.info/?l=linux-kernel&m=128588102620299&w=2

That looks like a zero length barrier send down to SCSI with the RW flag set (hence we try to map a buffer that has nothing to map). I cc'd dm-devel to see what their opinion is.

James

#3 lore raw
Quoted 31 lines · James Bottomley
Quoted 14 lines · On Sun, 2010-10-03 at 18:37 +0000, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=19642

           Summary: 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 2.6.36-rc6
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: SCSI
        AssignedTo: [email protected]

I think this is wrong.

Quoted 11 lines

ReportedBy: [email protected]
CC: [email protected], [email protected],
[email protected]
Regression: Yes

Subject : 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113
Submitter : "George Spelvin" <[email protected]>
Date : 2010-09-30 21:10
Message-ID : [email protected] References : http://marc.info/?l=linux-kernel&m=128588102620299&w=2

Quoted 3 lines

That looks like a zero length barrier send down to SCSI with the RW flag set (hence we try to map a buffer that has nothing to map). I cc'd dm-devel to see what their opinion is.

Given that the referenced LKML report is MD focused it seems linux-raid should be cc'd instead (doing so now).

Mike

#4 lore raw

[Bug 19642] 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=19642

--- Comment #1 from Anonymous Emailer <[email protected]> 2010-10-03 18:53:57 ---
Reply-To: [email protected]

Quoted 14 lines · On Sun, 2010-10-03 at 18:37 +0000, [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=19642

           Summary: 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 2.6.36-rc6
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: SCSI
        AssignedTo: [email protected]

I think this is wrong.

Quoted 11 lines

ReportedBy: [email protected]
CC: [email protected], [email protected],
[email protected]
Regression: Yes

Subject : 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113
Submitter : "George Spelvin" <[email protected]>
Date : 2010-09-30 21:10
Message-ID : [email protected] References : http://marc.info/?l=linux-kernel&m=128588102620299&w=2

That looks like a zero length barrier send down to SCSI with the RW flag set (hence we try to map a buffer that has nothing to map). I cc'd dm-devel to see what their opinion is.

James

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#5 lore raw

[Bug 19642] 2.6.36-rc6 BUG at drivers/scsi/scsi_lib.c:1113

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=19642

Alasdair G Kergon <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

                 CC|                            |[email protected]
          Component|SCSI                        |MD
         AssignedTo|[email protected]  |[email protected]
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