Re: Bug found in block/scsi_ioctl.c

From: Jens Axboe
Date: Wed Jun 05 2013 - 10:54:11 EST

On Wed, Jun 05 2013, hari krishnan wrote:
> I got a kernel crash, and dump is pointing to "IP: [<ffffffff81260e86>]
> sg_scsi_ioctl+0x166/0x3b0".
> Test case: *I was just deleting few NPIV port to which some of LUN's where
> exported, after sometime I was running parted on some devices"*
> The crash is in sg_scsi_ioctl of block/scsi_ioctl.c.
> From code and dump it seems sg_scsi_ioctl is allocating request by calling
> blk_get_request and assuming it will never fail, but it will fail if device
> is dead, here in this case some of SCSI devices are dead.

It's a known bug, Joe Lawrence has posted a patch to fix it up that will
be muscled into 3.10.

Can you give it a go?

Jens Axboe

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