Lee Duncan
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to chena...@oppo.com, linux-...@vger.kernel.org, linux...@vger.kernel.org, open-...@googlegroups.com, ceph-...@vger.kernel.org, martin....@oracle.com, je...@linux.ibm.com, cle...@redhat.com
On 3/27/20 2:20 AM,
chena...@oppo.com wrote:
> From: Chen Anqing <
chena...@oppo.com>
> To: Lee Duncan <
ldu...@suse.com>
> Cc: Chris Leech <
cle...@redhat.com>,
> "James E . J . Bottomley" <
je...@linux.ibm.com>,
> "Martin K . Petersen" <
martin....@oracle.com>,
>
ceph-...@vger.kernel.org,
>
open-...@googlegroups.com,
>
linux...@vger.kernel.org,
>
linux-...@vger.kernel.org,
>
chena...@oppo.com
> Subject: [PATCH] scsi: libiscsi: we should take compound page into account also
> Date: Fri, 27 Mar 2020 05:20:01 -0400
> Message-Id: <
20200327092001.5...@oppo.com>
> X-Mailer: git-send-email 2.18.2
>
> the patch is occur at a real crash,which slab is
> come from a compound page,so we need take the compound page
> into account also.
> fixed commit 08b11eaccfcf ("scsi: libiscsi: fall back to
> sendmsg for slab pages").
>
> Signed-off-by: Chen Anqing <
chena...@oppo.com>
> ---
> drivers/scsi/libiscsi_tcp.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/libiscsi_tcp.c b/drivers/scsi/libiscsi_tcp.c
> index 6ef93c7af954..98304e5e1f6f 100644
> --- a/drivers/scsi/libiscsi_tcp.c
> +++ b/drivers/scsi/libiscsi_tcp.c
> @@ -128,7 +128,8 @@ static void iscsi_tcp_segment_map(struct iscsi_segment *segment, int recv)
> * coalescing neighboring slab objects into a single frag which
> * triggers one of hardened usercopy checks.
> */
> - if (!recv && page_count(sg_page(sg)) >= 1 && !PageSlab(sg_page(sg)))
> + if (!recv && page_count(sg_page(sg)) >= 1 &&
> + !PageSlab(compound_head(sg_page(sg))))
> return;
>
> if (recv) {
> --
> 2.18.2
>
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