From: Chen Anqing <chenanqing@xxxxxxxx>
To: Lee Duncan <lduncan@xxxxxxxx>
Cc: Chris Leech <cleech@xxxxxxxxxx>,
"James E . J . Bottomley" <jejb@xxxxxxxxxxxxx>,
"Martin K . Petersen" <martin.petersen@xxxxxxxxxx>,
ceph-devel@xxxxxxxxxxxxxxx,
open-iscsi@xxxxxxxxxxxxxxxx,
linux-scsi@xxxxxxxxxxxxxxx,
linux-kernel@xxxxxxxxxxxxxxx,
chenanqing@xxxxxxxx
Subject: [PATCH] scsi: libiscsi: we should take compound page into account also
Date: Fri, 27 Mar 2020 05:20:01 -0400
Message-Id: <20200327092001.56879-1-chenanqing@xxxxxxxx>
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 <chenanqing@xxxxxxxx>
---
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
________________________________
OPPO
本电子邮件及其附件含有OPPO公司的保密信息，仅限于邮件指明的收件人使用（包含个人及群组）。禁止任何人在未经授权的情况下以任何形式使用。如果您错收了本邮件，请立即以电子邮件通知发件人并删除本邮件及其附件。
This e-mail and its attachments contain confidential information from OPPO, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!
