From: Christoph Hellwig <hch@lst.de>
To: kernel test robot <oliver.sang@intel.com>
Cc: Christoph Hellwig <hch@lst.de>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Bart Van Assche <bvanassche@acm.org>,
John Garry <john.garry@huawei.com>,
LKML <linux-kernel@vger.kernel.org>,
lkp@lists.01.org, lkp@intel.com,
Kees Cook <keescook@chromium.org>
Subject: Re: [scsi] 6aded12b10: kernel_BUG_at_mm/usercopy.c
Date: Wed, 23 Mar 2022 08:14:10 +0100 [thread overview]
Message-ID: <20220323071409.GA25480@lst.de> (raw)
In-Reply-To: <20220320143453.GD6208@xsang-OptiPlex-9020>
The actual warning is;
[ 34.496096][ T331] usercopy: Kernel memory overwrite attempt detected to spans multiple pages (off set 0, size 6)!
This is for the cmnd field in struct scsi_cmnd, which is allocated by
the block layer as part of the request allocator. So with a specific
packing it can legitimately span pages.
Kees: how can we annotate that this is ok?
next prev parent reply other threads:[~2022-03-23 7:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-20 14:34 [scsi] 6aded12b10: kernel_BUG_at_mm/usercopy.c kernel test robot
2022-03-23 7:14 ` Christoph Hellwig [this message]
2022-03-23 15:40 ` Kees Cook
2022-03-23 15:42 ` Matthew Wilcox
2022-03-23 22:30 ` Kees Cook
2022-03-23 15:47 ` Christoph Hellwig
2022-03-23 22:33 ` Kees Cook
2022-03-24 6:48 ` Christoph Hellwig
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