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xen-devel
[Xen-devel] [PATCH]Fix HVM domain cannot save if domid > 99
hi keir,
I don't whether will pull back patches in xen-unstable to xen-3.1-testing,
but it is a big bug: HVM domain cannot save if domid > 99.
This bug due to the code in tools/ioemu/target-i386-dm/helper2.c:
int main_loop(void)
{
...
char qemu_file[20];
...
sprintf(qemu_file, "/tmp/xen.qemu-dm.%d", domid);
...
}
sprintf will overflow when domid > 99.
pull back xen-unstable changeset 15242 and 16866 fixes it.
thanks,
zhigang
log:
==============================================================================
xend.log:
[2008-06-05 12:41:58 2514] DEBUG (XendCheckpoint:90) [xc_save]:
/usr/lib/xen/bin/xc_save 26 101 0 0 4
[2008-06-05 12:41:58 2514] DEBUG (XendCheckpoint:349) suspend
[2008-06-05 12:41:58 2514] DEBUG (XendCheckpoint:93) In saveInputHandler
suspend
[2008-06-05 12:41:58 2514] DEBUG (XendCheckpoint:95) Suspending 101 ...
[2008-06-05 12:41:58 2514] DEBUG (XendDomainInfo:451)
XendDomainInfo.shutdown(suspend)
[2008-06-05 12:41:58 2514] DEBUG (XendDomainInfo:996)
XendDomainInfo.handleShutdownWatch
[2008-06-05 12:41:58 2514] DEBUG (XendDomainInfo:996)
XendDomainInfo.handleShutdownWatch
[2008-06-05 12:41:58 2514] INFO (XendCheckpoint:101) Domain 101 suspended.
[2008-06-05 12:41:58 2514] INFO (XendCheckpoint:106) release_devices for hvm
domain
[2008-06-05 12:41:58 2514] INFO (XendDomainInfo:1186) Domain has shutdown:
name=migrating-win2k3_annie id=101 reason=suspend.
[2008-06-05 12:41:58 2514] INFO (image:466) use sigusr1 to signal qemu 6820
[2008-06-05 12:41:59 2514] DEBUG (XendCheckpoint:110) Written done
[2008-06-05 12:42:06 2514] INFO (XendCheckpoint:378) Saving memory pages: iter
1 0%^H^H^H^H 5%^H^H^H^H 10%^H^H^H^H 15%^H^H^H^H 20%^H^H^H^H 25%^H^H^H^H
30%^H^H^H^H 35%^H^H^H^H 40%^H^H^H^H 45%^H^H^H^H 50%^H^H^H^H 55%^H^H^H^H
60%^H^H^H^H 65%^H^H^H^H 70%^H^H^H^H 75%^H^H^H^H 80%^H^H^H^H 85%^H^H^H^H
90%^H^H^H^H 95%^M 1: sent 983008, skipped 0, delta 6657ms, dom0 59%, target 0%,
sent 4838Mb/s, dirtied 0Mb/s 0 pages
[2008-06-05 12:42:06 2514] INFO (XendCheckpoint:378) Total pages sent= 983008
(0.94x)
[2008-06-05 12:42:06 2514] INFO (XendCheckpoint:378) (of which 0 were fixups)
[2008-06-05 12:42:06 2514] INFO (XendCheckpoint:378) All memory is saved
[2008-06-05 12:42:07 2514] INFO (XendCheckpoint:378) Save exit rc=0
[2008-06-05 12:42:07 2514] ERROR (XendCheckpoint:143) Save failed on domain
win2k3_annie (101).
Traceback (most recent call last):
File "/usr/lib/python2.4/site-packages/xen/xend/XendCheckpoint.py", line 117,
in save
qemu_fd = os.open("/tmp/xen.qemu-dm.%d" % dominfo.getDomid(), os.O_RDONLY)
OSError: [Errno 2] No such file or directory: '/tmp/xen.qemu-dm.101'
==============================================================================
xend-debug.log:
Thu Jun 5 12:41:59 2008
main: End of stream
*** buffer overflow detected ***: /usr/lib/xen/bin/qemu-dm terminated
======= Backtrace: =========
/lib/i686/nosegneg/libc.so.6(__chk_fail+0x41)[0x351ac1]
/lib/i686/nosegneg/libc.so.6[0x3512d8]
/lib/i686/nosegneg/libc.so.6(_IO_default_xsputn+0xb4)[0x2d12b4]
/lib/i686/nosegneg/libc.so.6(_IO_vfprintf+0xf8c)[0x2aa86c]
/lib/i686/nosegneg/libc.so.6(__vsprintf_chk+0xad)[0x35138d]
/lib/i686/nosegneg/libc.so.6(__sprintf_chk+0x30)[0x3512c0]
/usr/lib/xen/bin/qemu-dm[0x80c111a]
[0x656c6c61]
======= Memory map: ========
00110000-0011b000 r-xp 00000000 08:06 485119
/lib/libgcc_s-4.1.1-20070105.so.1
0011b000-0011c000 rw-p 0000a000 08:06 485119
/lib/libgcc_s-4.1.1-20070105.so.1
00251000-0026a000 r-xp 00000000 08:06 485104 /lib/ld-2.5.so
0026a000-0026b000 r--p 00018000 08:06 485104 /lib/ld-2.5.so
0026b000-0026c000 rw-p 00019000 08:06 485104 /lib/ld-2.5.so
0026e000-003a8000 r-xp 00000000 08:06 485105
/lib/i686/nosegneg/libc-2.5.so
003a8000-003aa000 r--p 0013a000 08:06 485105
/lib/i686/nosegneg/libc-2.5.so
003aa000-003ab000 rw-p 0013c000 08:06 485105
/lib/i686/nosegneg/libc-2.5.so
003ab000-003ae000 rw-p 003ab000 00:00 0
003b0000-003d5000 r-xp 00000000 08:06 485108
/lib/i686/nosegneg/libm-2.5.so
003d5000-003d6000 r--p 00024000 08:06 485108
/lib/i686/nosegneg/libm-2.5.so
003d6000-003d7000 rw-p 00025000 08:06 485108
/lib/i686/nosegneg/libm-2.5.so
003d9000-003ec000 r-xp 00000000 08:06 485109
/lib/i686/nosegneg/libpthread-2.5.so
003ec000-003ed000 r--p 00012000 08:06 485109
/lib/i686/nosegneg/libpthread-2.5.so
003ed000-003ee000 rw-p 00013000 08:06 485109
/lib/i686/nosegneg/libpthread-2.5.so
003ee000-003f0000 rw-p 003ee000 00:00 0
003f2000-003f9000 r-xp 00000000 08:06 485115
/lib/i686/nosegneg/librt-2.5.so
003f9000-003fa000 r--p 00006000 08:06 485115
/lib/i686/nosegneg/librt-2.5.so
003fa000-003fb000 rw-p 00007000 08:06 485115
/lib/i686/nosegneg/librt-2.5.so
003fd000-003ff000 r-xp 00000000 08:06 483069 /lib/libutil-2.5.so
003ff000-00400000 r--p 00001000 08:06 483069 /lib/libutil-2.5.so
00400000-00401000 rw-p 00002000 08:06 483069 /lib/libutil-2.5.so
00406000-00408000 r-xp 00000000 08:06 485106 /lib/libdl-2.5.so
00408000-00409000 r--p 00001000 08:06 485106 /lib/libdl-2.5.so
00409000-0040a000 rw-p 00002000 08:06 485106 /lib/libdl-2.5.so
0040c000-00415000 r-xp 00000000 08:06 649748 /usr/lib/libesd.so.0.2.36
00415000-00416000 rw-p 00009000 08:06 649748 /usr/lib/libesd.so.0.2.36
00424000-00428000 r-xp 00000000 08:06 649184 /usr/lib/libxenstore.so.3.0.0
00428000-00429000 rw-p 00003000 08:06 649184 /usr/lib/libxenstore.so.3.0.0
00429000-0042c000 rw-p 00429000 00:00 0
0042e000-00440000 r-xp 00000000 08:06 655601 /usr/lib/libxenctrl.so.3.0.0
00440000-00441000 rw-p 00012000 08:06 655601 /usr/lib/libxenctrl.so.3.0.0
00441000-00457000 rw-p 00441000 00:00 0
0046d000-0047f000 r-xp 00000000 08:06 649162 /usr/lib/libz.so.1.2.3
0047f000-00480000 rw-p 00011000 08:06 649162 /usr/lib/libz.so.1.2.3
00482000-00558000 r-xp 00000000 08:06 485120 /lib/libasound.so.2.0.0
00558000-0055d000 rw-p 000d5000 08:06 485120 /lib/libasound.so.2.0.0
0055f000-00587000 r-xp 00000000 08:06 653260
/usr/lib/libaudiofile.so.0.0.2
00587000-0058a000 rw-p 00027000 08:06 653260
/usr/lib/libaudiofile.so.0.0.2
0058c000-005a6000 r-xp 00000000 08:06 649799 /usr/lib/libxenguest.so.3.0.0
005a6000-005a7000 rw-p 0001a000 08:06 649799 /usr/lib/libxenguest.so.3.0.0
005a9000-00625000 r-xp 00000000 08:06 652618 /usr/lib/libSDL-1.2.so.0.7.3
00625000-00627000 rw-p 0007c000 08:06 652618 /usr/lib/libSDL-1.2.so.0.7.3
00627000-00652000 rw-p 00627000 00:00 0
009d2000-009d3000 r-xp 009d2000 00:00 0 [vdso]
08047000-080e2000 r-xp 00000000 08:06 807541 /usr/lib/xen/bin/qemu-dm
080e2000-080e7000 rw-p 0009b000 08:06 807541 /usr/lib/xen/bin/qemu-dm
080e7000-082ad000 rw-p 080e7000 00:00 0
0a0d2000-0a13b000 rw-p 0a0d2000 00:00 0
b51a7000-b59a7000 rw-s 00000000 00:03 4026533330 /proc/xen/privcmd
b59a8000-b59a9000 ---p b59a8000 00:00 0
b59a9000-b63a9000 rw-p b59a9000 00:00 0
b6a90000-b6b1d000 rw-p b74a7000 00:00 0
b6baa000-b7439000 rw-p b6baa000 00:00 0
b75a2000-b75d2000 rw-s 00000000 00:08 132139 /dev/zero (deleted)
b75d2000-b75d3000 ---p b75d2000 00:00 0
b75d3000-b7fd8000 rw-p b75d3000 00:00 0
b7fd8000-b7fd9000 rw-s 00000000 00:03 4026533330 /proc/xen/privcmd
b7fd9000-b7fda000 rw-s 00000000 00:03 4026533330 /proc/xen/privcmd
b7fda000-b7fdc000 rw-p b7fda000 00:00 0
bf920000-bf935000 rw-p bf920000 00:00 0 [stack]
==============================================================================
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