Bug 954306

Created attachment 738456 [details]
gdb info

Please feel free to reassign this BZ as appropriate.  Thanks.

Build in qemu-kvm-1.5.0-1.el7

Reproduced this bug.

Host:
qemu-kvm-1.4.0-4.el7.x86_64
kernel-3.10.0-64.el7.x86_64

Guest:
RHEL7-64

Cli:
gdb --args /usr/libexec/qemu-kvm \
-M pc \
-cpu Opteron_G1 \
-m 8G \
-smp 4,sockets=2,cores=2,threads=1,maxcpus=16 \
-enable-kvm \
-name rhel7-64 \
-uuid 990ea161-6b67-47b2-b803-19fb01d30d12 \
-smbios type=1,manufacturer='Red Hat',product='RHEV Hypervisor',version=el6,serial=koTUXQrb,uuid=feebc8fd-f8b0-4e75-abc3-e63fcdb67170 \
-k en-us \
-rtc base=localtime,clock=host,driftfix=slew \
-nodefaults \
-monitor stdio \
-qmp tcp:0:6666,server,nowait \
-boot menu=on \
-bios /usr/share/seabios/bios.bin \
-vga qxl \
-spice port=5900,disable-ticketing \
-chardev socket,id=seabioslog,path=/tmp/seabios,server,nowait \
-device isa-debugcon,chardev=seabioslog,iobase=0x402 \
-monitor unix:/tmp/guest-sock,server,nowait \
-drive file=/home/rhel7-64.raw,if=none,id=drive-ide0-0-1,format=raw,cache=none,aio=threads \
-device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-0-1,id=ide0-0-1,bootindex=0 \
-netdev tap,id=hostnet0,vhost=on \
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:39:13:2c \
-device virtio-balloon-pci,id=balloon0 \

Steps:
Execute the following python script in guest:
import struct
f = file("/dev/port","rw+")

def outb(port, data):
    f.seek(port)
    f.write(struct.pack("B", data))

outb(0x43, 0x34)
outb(0x40, 0x1)
outb(0x40, 0x0)

Result:
qemu-kvm core dumped.

(gdb) bt
#0  0x0000000000000000 in ?? ()
#1  0x0000555555769f8c in memory_region_read_accessor (opaque=0x5555564daf68, addr=<optimized out>, 
    value=0x7fffea7bab60, size=1, shift=0, mask=255) at /usr/src/debug/qemu-1.4.0/memory.c:316
#2  0x00005555557698f2 in access_with_adjusted_size (addr=addr@entry=0, value=value@entry=0x7fffea7bab60, size=1, 
    access_size_min=<optimized out>, access_size_max=<optimized out>, 
    access=access@entry=0x555555769f40 <memory_region_read_accessor>, opaque=opaque@entry=0x5555564daf68)
    at /usr/src/debug/qemu-1.4.0/memory.c:364
#3  0x000055555576aef8 in memory_region_iorange_read (iorange=0x5555564db2d0, offset=0, width=1, data=0x7fffea7bab60)
    at /usr/src/debug/qemu-1.4.0/memory.c:409
#4  0x0000555555764ee7 in ioport_readb_thunk (opaque=<optimized out>, addr=<optimized out>)
    at /usr/src/debug/qemu-1.4.0/ioport.c:186
#5  0x00005555557657b1 in ioport_read (address=126, index=0) at /usr/src/debug/qemu-1.4.0/ioport.c:70
#6  cpu_inb (addr=addr@entry=126) at /usr/src/debug/qemu-1.4.0/ioport.c:309
#7  0x0000555555767b7b in kvm_handle_io (count=1, size=1, direction=0, data=<optimized out>, port=126)
    at /usr/src/debug/qemu-1.4.0/kvm-all.c:1414
#8  kvm_cpu_exec (env=env@entry=0x55555650cde0) at /usr/src/debug/qemu-1.4.0/kvm-all.c:1581
#9  0x0000555555714741 in qemu_kvm_cpu_thread_fn (arg=0x55555650cde0) at /usr/src/debug/qemu-1.4.0/cpus.c:759
#10 0x00007ffff625cde3 in start_thread () from /lib64/libpthread.so.0
#11 0x00007ffff3bf526d in clone () from /lib64/libc.so.6

Should be fixed qemu-kvm-1.5.3-21.el7(In reply to mazhang from comment #5)
> Reproduced this bug.
> 
> Host:
> qemu-kvm-1.4.0-4.el7.x86_64
> kernel-3.10.0-64.el7.x86_64

Please attempt to use 

qemu-kvm-1.5.0-1.el7

or newer.

> 
> Guest:
> RHEL7-64
> 
> Cli:
> gdb --args /usr/libexec/qemu-kvm \
> -M pc \
> -cpu Opteron_G1 \
> -m 8G \
> -smp 4,sockets=2,cores=2,threads=1,maxcpus=16 \
> -enable-kvm \
> -name rhel7-64 \
> -uuid 990ea161-6b67-47b2-b803-19fb01d30d12 \
> -smbios type=1,manufacturer='Red Hat',product='RHEV
> Hypervisor',version=el6,serial=koTUXQrb,uuid=feebc8fd-f8b0-4e75-abc3-
> e63fcdb67170 \
> -k en-us \
> -rtc base=localtime,clock=host,driftfix=slew \
> -nodefaults \
> -monitor stdio \
> -qmp tcp:0:6666,server,nowait \
> -boot menu=on \
> -bios /usr/share/seabios/bios.bin \
> -vga qxl \
> -spice port=5900,disable-ticketing \
> -chardev socket,id=seabioslog,path=/tmp/seabios,server,nowait \
> -device isa-debugcon,chardev=seabioslog,iobase=0x402 \
> -monitor unix:/tmp/guest-sock,server,nowait \
> -drive
> file=/home/rhel7-64.raw,if=none,id=drive-ide0-0-1,format=raw,cache=none,
> aio=threads \
> -device
> ide-drive,bus=ide.1,unit=0,drive=drive-ide0-0-1,id=ide0-0-1,bootindex=0 \
> -netdev tap,id=hostnet0,vhost=on \
> -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:39:13:2c \
> -device virtio-balloon-pci,id=balloon0 \
> 
> Steps:
> Execute the following python script in guest:
> import struct
> f = file("/dev/port","rw+")
> 
> def outb(port, data):
>     f.seek(port)
>     f.write(struct.pack("B", data))
> 
> outb(0x43, 0x34)
> outb(0x40, 0x1)
> outb(0x40, 0x0)
> 
> Result:
> qemu-kvm core dumped.
> 
> (gdb) bt
> #0  0x0000000000000000 in ?? ()
> #1  0x0000555555769f8c in memory_region_read_accessor
> (opaque=0x5555564daf68, addr=<optimized out>, 
>     value=0x7fffea7bab60, size=1, shift=0, mask=255) at
> /usr/src/debug/qemu-1.4.0/memory.c:316
> #2  0x00005555557698f2 in access_with_adjusted_size (addr=addr@entry=0,
> value=value@entry=0x7fffea7bab60, size=1, 
>     access_size_min=<optimized out>, access_size_max=<optimized out>, 
>     access=access@entry=0x555555769f40 <memory_region_read_accessor>,
> opaque=opaque@entry=0x5555564daf68)
>     at /usr/src/debug/qemu-1.4.0/memory.c:364
> #3  0x000055555576aef8 in memory_region_iorange_read
> (iorange=0x5555564db2d0, offset=0, width=1, data=0x7fffea7bab60)
>     at /usr/src/debug/qemu-1.4.0/memory.c:409
> #4  0x0000555555764ee7 in ioport_readb_thunk (opaque=<optimized out>,
> addr=<optimized out>)
>     at /usr/src/debug/qemu-1.4.0/ioport.c:186
> #5  0x00005555557657b1 in ioport_read (address=126, index=0) at
> /usr/src/debug/qemu-1.4.0/ioport.c:70
> #6  cpu_inb (addr=addr@entry=126) at /usr/src/debug/qemu-1.4.0/ioport.c:309
> #7  0x0000555555767b7b in kvm_handle_io (count=1, size=1, direction=0,
> data=<optimized out>, port=126)
>     at /usr/src/debug/qemu-1.4.0/kvm-all.c:1414
> #8  kvm_cpu_exec (env=env@entry=0x55555650cde0) at
> /usr/src/debug/qemu-1.4.0/kvm-all.c:1581
> #9  0x0000555555714741 in qemu_kvm_cpu_thread_fn (arg=0x55555650cde0) at
> /usr/src/debug/qemu-1.4.0/cpus.c:759
> #10 0x00007ffff625cde3 in start_thread () from /lib64/libpthread.so.0
> #11 0x00007ffff3bf526d in clone () from /lib64/libc.so.6

Update host kernel package to comment 9 provide and re-test it, host will not kernel panic.

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.