RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 1141667 - Qemu crashed if reboot guest after hot remove AC97 sound device
Summary: Qemu crashed if reboot guest after hot remove AC97 sound device
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm
Version: 7.1
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: ---
Assignee: Amos Kong
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: 1141666
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-09-15 07:54 UTC by Qian Guo
Modified: 2015-05-25 00:08 UTC (History)
12 users (show)

Fixed In Version: qemu-kvm-1.5.3-79.el7
Doc Type: Bug Fix
Doc Text:
Clone Of: 1141666
Environment:
Last Closed: 2015-03-05 08:12:28 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:0349 0 normal SHIPPED_LIVE Important: qemu-kvm security, bug fix, and enhancement update 2015-03-05 12:27:34 UTC

Description Qian Guo 2014-09-15 07:54:31 UTC 
+++ This bug was initially created as a clone of Bug #1141666 +++

Description of problem:
Qemu crashed if reboot guest after hot remove AC97 sound device

I test both rhel and windows guest(windows 7 even can not drive this AC97 sound device), and both hit such issue.

Version-Release number of selected component (if applicable):
qemu-kvm-rhev-2.1.0-3.el7.x86_64
3.10.0-158.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Boot guest with AC97 sound device:
# /usr/libexec/qemu-kvm -cpu Penryn -enable-kvm -m 4G -smp 4,sockets=1,cores=4,threads=1 -name test -rtc base=localtime,clock=host,driftfix=slew  -k en-us  -boot menu=on -spice disable-ticketing,port=5900 -vga qxl -usb -device usb-tablet -monitor stdio -drive file=/home/win7-64-sp1-virtio.qcow2,if=none,id=drive-system-disk,media=disk,format=qcow2,aio=native,werror=stop,rerror=stop -device virtio-blk-pci,drive=drive-system-disk,id=system-disk,addr=0x3 -netdev tap,vhost=on,id=hostnet0,script=/etc/qemu-ifup -device virtio-net-pci,netdev=hostnet0,id=vnet0,mac=ae:df:47:0d:87:44 -device AC97,id=a1 -qmp unix:/tmp/q1,server,nowait

2.Hot unplug the sound device 
{"execute":"device_del","arguments":{"id":"a1"}}
{"return": {}}
{"timestamp": {"seconds": 1410766965, "microseconds": 834460}, "event": "DEVICE_DELETED", "data": {"device": "a1", "path": "/machine/peripheral/a1"}}

3.Reboot guest

Actual results:
Qemu crashed:

(gdb) 
#0  AUD_set_active_in (sw=0x5555563cf798, on=0) at audio/audio.c:1261
#1  0x000055555576b522 in reset_bm_regs (s=s@entry=0x55555640f940, r=r@entry=0x5555564101b4) at hw/audio/ac97.c:326
#2  0x000055555576c290 in ac97_on_reset (opaque=0x55555640f940) at hw/audio/ac97.c:1328
#3  0x00005555557223dd in qemu_devices_reset () at vl.c:1830
#4  qemu_system_reset (report=report@entry=true) at vl.c:1843
#5  0x000055555561e0df in main_loop_should_exit () at vl.c:1974
#6  main_loop () at vl.c:2014
#7  main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4552
(gdb) bt ful
#0  AUD_set_active_in (sw=0x5555563cf798, on=0) at audio/audio.c:1261
        nb_active = 0
        s = 0x555555d1e5a0 <glob_audio_state>
        temp_sw = 0x74894c30468b4808
        hw = 0x555555621490 <mem_add>
#1  0x000055555576b522 in reset_bm_regs (s=s@entry=0x55555640f940, r=r@entry=0x5555564101b4) at hw/audio/ac97.c:326
No locals.
#2  0x000055555576c290 in ac97_on_reset (opaque=0x55555640f940) at hw/audio/ac97.c:1328
        s = 0x55555640f940
#3  0x00005555557223dd in qemu_devices_reset () at vl.c:1830
        re = <optimized out>
        nre = 0x5555563fa500
#4  qemu_system_reset (report=report@entry=true) at vl.c:1843
        mc = <optimized out>
        __func__ = "qemu_system_reset"
#5  0x000055555561e0df in main_loop_should_exit () at vl.c:1974
        r = <optimized out>
#6  main_loop () at vl.c:2014
        nonblocking = <optimized out>
        last_io = 1
#7  main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4552
        i = <optimized out>
        snapshot = 0
        linux_boot = 0
        icount_option = 0x0
        initrd_filename = 0x0
        kernel_filename = 0x0
        kernel_cmdline = <optimized out>
        boot_order = <optimized out>
        ds = <optimized out>
        cyls = 0
        heads = 0
        secs = 0
        translation = <optimized out>
---Type <return> to continue, or q <return> to quit---   
        hda_opts = <optimized out>
        opts = <optimized out>
        machine_opts = <optimized out>
        olist = <optimized out>
        optind = 35
        optarg = 0x7fffffffe6d8 "AC97,id=a1"
        loadvm = 0x0
        machine_class = <optimized out>
        cpu_model = 0x7fffffffe4ab "Penryn"
        vga_model = 0x7fffffffe55e "qxl"
        qtest_chrdev = 0x0
        qtest_log = 0x0
        pid_file = 0x0
        incoming = 0x0
        show_vnc_port = 0
        defconfig = <optimized out>
        userconfig = 94
        log_mask = <optimized out>
        log_file = 0x0
        mem_trace = {malloc = 0x555555720a90 <malloc_and_trace>, realloc = 0x555555720a70 <realloc_and_trace>, 
          free = 0x555555720a60 <free_and_trace>, calloc = 0x0, try_malloc = 0x0, try_realloc = 0x0}
        trace_events = 0x0
        trace_file = 0x0
        maxram_size = 4294967296
        ram_slots = 0
        vmstate_dump_file = 0x0
        __func__ = "main"


Expected results:
No crash, can reboot successfully.

Additional info:
Comment 1 Qian Guo 2014-09-15 07:55:44 UTC 
Clone bug 1141666 since qemu-kvm can hit this issue too.
Component:
qemu-kvm-1.5.3-70.el7.x86_64
Comment 3 Gerd Hoffmann 2014-10-24 08:07:32 UTC 
upstream commit 133771477c39f3716d9a85609aca0d3e5a77c55c
Comment 4 Gerd Hoffmann 2014-10-27 09:30:56 UTC 
backport posted.
Comment 5 Miroslav Rezanina 2014-11-12 11:26:43 UTC 
Fix included in qemu-kvm-1.5.3-79.el7
Comment 7 Qian Guo 2014-11-13 03:18:59 UTC 
Reproduce this bug with qemu-kvm-1.5.3-70.el7.x86_64
Steps
1.Boot guest with AC97 
# /usr/libexec/qemu-kvm -cpu Penryn -m 4G -smp 4,sockets=1,cores=4,threads=1 -M pc -enable-kvm -device piix3-usb-uhci,id=usb -name rhel7 -nodefaults -nodefconfig -device virtio-balloon-pci,id=balloon0 -spice disable-ticketing,port=5000 -vga qxl -global PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 -monitor stdio -drive file=/home/rhel71029/rhel711029cp1.qcow2,if=none,media=disk,format=qcow2,rerror=stop,werror=stop,aio=native,id=scsi-disk0 -device virtio-scsi-pci,id=bus2 -device scsi-hd,bus=bus2.0,drive=scsi-disk0,id=disk0 -device AC97,id=a1 -qmp unix:/tmp/q1,server,nowait

2.Hot unplug the ac97 device
{"execute":"qmp_capabilities"}
{"return": {}}
{"execute":"device_del","arguments":{"id":"a1"}}
{"return": {}}
{"timestamp": {"seconds": 1415847569, "microseconds": 75933}, "event": "DEVICE_DELETED", "data": {"device": "a1", "path": "/machine/peripheral/a1"}}

3.Reboot guest

Result: qemu crashed:

(gdb) bt
#0  AUD_set_active_out (sw=0xae00, on=0) at audio/audio.c:1194
#1  0x0000555555658872 in reset_bm_regs (s=s@entry=0x5555567484a0, r=r@entry=0x555556748b8c)
    at hw/audio/ac97.c:326
#2  0x00005555556595ff in ac97_on_reset (opaque=0x5555567484a0) at hw/audio/ac97.c:1331
#3  0x000055555574473d in qemu_devices_reset () at vl.c:1811
#4  qemu_system_reset (report=report@entry=true) at vl.c:1820
#5  0x0000555555604c34 in main_loop_should_exit () at vl.c:1954
#6  main_loop () at vl.c:1992
#7  main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4379

So this bug is reproduced


Verify this bug with qemu-kvm-1.5.3-79.el7.x86_64

steps as above

Result: after reboot, guest can work well,and ac97 is deleted successfully.

Verified with both windows7 and rhel7.1 guest. 

So this bug is fixed
Comment 9 errata-xmlrpc 2015-03-05 08:12:28 UTC 
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.

https://rhn.redhat.com/errata/RHSA-2015-0349.html
Note You need to log in before you can comment on or make changes to this bug.