Bug 1090978 – qemu-kvm: iSCSI: Failure. SENSE KEY:ILLEGAL_REQUEST(5) ASCQ:INVALID_FIELD_IN_CDB(0x2400)

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Bug 1090978 - qemu-kvm: iSCSI: Failure. SENSE KEY:ILLEGAL_REQUEST(5) ASCQ:INVALID_FIELD_IN_CDB(0x2400)

Summary:	qemu-kvm: iSCSI: Failure. SENSE KEY:ILLEGAL_REQUEST(5) ASCQ:INVALID_FIELD_IN_...

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	qemu-kvm (Show other bugs)
Sub Component:
Version:	7.0
Hardware:	Unspecified Unspecified

Priority	high Severity urgent
Target Milestone:	rc
Target Release:	---
Assigned To:	Miroslav Rezanina
QA Contact:	Virtualization Bugs
Docs Contact:

URL:
Whiteboard:
Keywords:	Regression, ZStream

Depends On:	1083413
Blocks:
	Show dependency tree / graph

Reported:	2014-04-24 10:02 EDT by Jan Kurik
Modified:	2014-06-10 08:34 EDT (History)
CC List:	15 users (show)

See Also:
Fixed In Version:	qemu-kvm-1.5.3-60.el7_0.1
Doc Type:	Bug Fix
Doc Text:	Due to a bug in the Internet Small Computer System Interface (iSCSI) driver, a qemu-kvm process terminated unexpectedly with a segmentation fault when the "write same" command was executed in guest mode under the iSCSI protocol. This update fixes the bug and the "write same" command now functions in guest mode under iSCSI as intended.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-06-10 08:34:50 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2014:0704	normal	SHIPPED_LIVE	Moderate: qemu-kvm security and bug fix update	2014-06-10 12:34:02 EDT

Groups: None (edit)

Description Jan Kurik 2014-04-24 10:02:58 EDT

This bug has been copied from bug #1083413 and has been proposed
to be backported to 7.0 z-stream (EUS).

Comment 6 Sibiao Luo 2014-05-06 04:21:07 EDT

Verify this issue on qemu-kvm-1.5.3-60.el7_0.1.x86_64 with the same steps as bug 1083413#c0.

host info:
# uname -r && rpm -q qemu-kvm
3.10.0-123.el7.x86_64
qemu-kvm-1.5.3-60.el7_0.1.x86_64
guest info:
# uname -r
3.10.0-123.el7.x86_64

Steps:
1.prepare a libiscsi LUN.
# qemu-img info iscsi://10.66.8.202:3260/iqn.2003-01.org.linux-iscsi.dhcp-8-202.x8664:sn.e1f8ebef2fed/0
image: iscsi://10.66.8.202:3260/iqn.2003-01.org.linux-iscsi.dhcp-8-202.x8664:sn.e1f8ebef2fed/0
file format: qcow2
virtual size: 1.0G (1073741824 bytes)
disk size: unavailable
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false
2.start qemu with this libiscsi disk.
# /usr/libexec/qemu-kvm -M pc -cpu Conroe -enable-kvm -m 2048 -smp 2,sockets=2,cores=1,threads=1 -no-kvm-pit-reinjection...-drive file=iscsi://10.66.8.202:3260/iqn.2003-01.org.linux-iscsi.dhcp-8-202.x8664:sn.e1f8ebef2fed/0,if=none,media=disk,format=qcow2,id=drive-data-disk,cache=none,aio=native,discard=on -device virtio-scsi-pci,bus=pci.0,addr=0x7,id=scsi0,multifunction=on -device scsi-hd,drive=drive-data-disk,id=data-disk,bus=scsi0.0,logical_block_size=4096
3. Execute the following commands in guest:
# yes | head -n2048 > buf
# sg_write_same --in buf --num=32 --lba=80 /dev/sdb
# sg_write_same --in /dev/zero --num=96 --lba=0 /dev/sdb
# sg_write_same -U --in /dev/zero --num=16 --lba=0 /dev/sdb
# time sg_write_same --in buf --num=65536 --lba=131074 /dev/sdb
# time sg_write_same --in /dev/zero --num=65534 --lba=196608 /dev/sdb
# sg_write_same --in /dev/zero --num=0 --lba=128 /dev/sdb

Results:
It did not cause QEMU core dumped, both guest and QEMU work well.
# yes | head -n2048 > buf
# sg_write_same --in buf --num=32 --lba=80 /dev/sdb
# sg_write_same --in /dev/zero --num=96 --lba=0 /dev/sdb
# sg_write_same -U --in /dev/zero --num=16 --lba=0 /dev/sdb
# time sg_write_same --in buf --num=65536 --lba=131074 /dev/sdb

real	0m5.512s
user	0m0.001s
sys	0m0.003s
# time sg_write_same --in /dev/zero --num=65534 --lba=196608 /dev/sdb

real	0m0.010s
user	0m0.002s
sys	0m0.002s
# sg_write_same --in /dev/zero --num=0 --lba=128 /dev/sdb
bad field in Write same(10) cdb, option probably not supported

According to above testing, this issue has been fixed correctly. Move to VERIFIED status, please correct me if any mistake.

Best Regards,
sluo

Comment 7 Sibiao Luo 2014-05-06 04:33:10 EDT

Both in my AMD(Opteron_G3) and Intel(SandyBridge) host tested this issue to pass.

Comment 10 errata-xmlrpc 2014-06-10 08:34:50 EDT

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2014-0704.html

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