From: Chen Anqing <[email protected]>
To: Lee Duncan <[email protected]>
Cc: Chris Leech <[email protected]>,
"James E . J . Bottomley" <[email protected]>,
"Martin K . Petersen" <[email protected]>,
[email protected],
[email protected],
[email protected],
[email protected],
[email protected]
Subject: [PATCH] scsi: libiscsi: we should take compound page into account also
Date: Fri, 27 Mar 2020 05:20:01 -0400
Message-Id: <[email protected]>
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 <[email protected]>
---
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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On 3/27/20 2:20 AM, [email protected] wrote:
> From: Chen Anqing <[email protected]>
> To: Lee Duncan <[email protected]>
> Cc: Chris Leech <[email protected]>,
> "James E . J . Bottomley" <[email protected]>,
> "Martin K . Petersen" <[email protected]>,
> [email protected],
> [email protected],
> [email protected],
> [email protected],
> [email protected]
> Subject: [PATCH] scsi: libiscsi: we should take compound page into account also
> Date: Fri, 27 Mar 2020 05:20:01 -0400
> Message-Id: <[email protected]>
> 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 <[email protected]>
> ---
> 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
>
This is missing a proper subject ...