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Date: Mon, 14 Feb 2011 14:19:56 +0800
From: Wen Congyang <wency@cn.fujitsu.com>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] [PATCH] Remove a detached device from
	qemu_device_opts.
References: <20110127180057.eb28d17f.oomichi@mxs.nes.nec.co.jp>
In-Reply-To: <20110127180057.eb28d17f.oomichi@mxs.nes.nec.co.jp>
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To: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Cc: qemu-devel@nongnu.org

At 01/27/2011 05:00 PM, Ken'ichi Ohmichi Write:
> 
> Hi,
> 
> When I tried to attach the interface after detaching the same interface,
> the virsh command output the following and it failed:
> 
>   # virsh detach-interface Domain01 network --mac 52:54:00:0d:78:92
>   Interface detached successfully
> 
>   # virsh attach-interface Domain01 network default --mac 52:54:00:0d:78:92
>   error: Failed to attach interface
>   error: internal error unable to execute QEMU command 'device_add': Duplicate ID 'net0' for device
>   #

I can reproduce this problem.

> 
> The reason is that a detached device is not removed from the list
> "qemu_device_opts", and this patch fixes it.

The detached device will be removed from the list "qemu_device_opts"
in qdev_free() asynchronously.

> 
> 
> Thanks
> Ken'ichi Ohmichi
> 
> 
> Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
> ---
> --- a/hw/qdev.c	2011-01-27 17:42:25.000000000 +0900
> +++ b/hw/qdev.c	2011-01-27 17:43:46.000000000 +0900
> @@ -905,6 +905,8 @@ int do_device_del(Monitor *mon, const QD
>          qerror_report(QERR_DEVICE_NOT_FOUND, id);
>          return -1;
>      }
> +    qemu_opts_del(qemu_opts_find(&qemu_device_opts, id));
> +

We can not use qemu_device_opts here, because qemu_device_opts is
a static variable in qemu-config.c. We should use qemu_find_opts("device")
instead of qemu_device_opts.

I test your patch by attach/detach interface, and qemu core dumps.
The reason may be that we call qemu_opts_del() twice.

Here is the log(/var/log/libvirt/qemu/<domain>.log):

*** glibc detected *** /usr/libexec/qemu-system-x86_64: free(): invalid pointer: 0x000000000355f000 ***
======= Backtrace: =========
/lib64/libc.so.6[0x351f275676]
/usr/libexec/qemu-system-x86_64[0x43e2a6]
/usr/libexec/qemu-system-x86_64[0x43f9a0]
/usr/libexec/qemu-system-x86_64[0x4400ee]
/usr/libexec/qemu-system-x86_64[0x4cb176]
/usr/libexec/qemu-system-x86_64[0x5af9f6]
/usr/libexec/qemu-system-x86_64[0x4953c1]
/usr/libexec/qemu-system-x86_64[0x495dab]
/usr/libexec/qemu-system-x86_64[0x43a087]
/usr/libexec/qemu-system-x86_64[0x43a5dd]
/usr/libexec/qemu-system-x86_64[0x51f8f5]
/usr/libexec/qemu-system-x86_64[0x40ad4b]
/usr/libexec/qemu-system-x86_64[0x40ae52]
/usr/libexec/qemu-system-x86_64[0x585c81]
/usr/libexec/qemu-system-x86_64[0x589da7]
/lib64/libc.so.6(__libc_start_main+0xfd)[0x351f21ec5d]
/usr/libexec/qemu-system-x86_64[0x408a19]
======= Memory map: ========
00400000-00784000 r-xp 00000000 08:06 679152                             /usr/libexec/qemu-system-x86_64
00983000-009c9000 rw-p 00383000 08:06 679152                             /usr/libexec/qemu-system-x86_64
009c9000-01177000 rw-p 00000000 00:00 0 
01177000-01178000 rwxp 00000000 00:00 0 
01178000-011d5000 rw-p 00000000 00:00 0 
02d32000-03109000 rw-p 00000000 00:00 0 
03109000-03119000 rw-p 00000000 00:00 0 
03119000-03134000 rw-p 00000000 00:00 0 
03134000-03144000 rw-p 00000000 00:00 0 
03144000-0352c000 rw-p 00000000 00:00 0 
0352c000-0353c000 rw-p 00000000 00:00 0 
0353c000-0354f000 rw-p 00000000 00:00 0 
0354f000-0355f000 rw-p 00000000 00:00 0 
0355f000-03580000 rw-p 00000000 00:00 0 
4154f000-4954f000 rwxp 00000000 00:00 0 
328d000000-328d038000 r-xp 00000000 08:06 394303                         /lib64/libgssapi_krb5.so.2.2
328d038000-328d237000 ---p 00038000 08:06 394303                         /lib64/libgssapi_krb5.so.2.2
328d237000-328d239000 rw-p 00037000 08:06 394303                         /lib64/libgssapi_krb5.so.2.2
328d400000-328d453000 r-xp 00000000 08:06 685072                         /usr/lib64/libssl.so.1.0.0
328d453000-328d653000 ---p 00053000 08:06 685072                         /usr/lib64/libssl.so.1.0.0
328d653000-328d65b000 rw-p 00053000 08:06 685072                         /usr/lib64/libssl.so.1.0.0
328d800000-328d827000 r-xp 00000000 08:06 394300                         /lib64/libk5crypto.so.3.1
328d827000-328da27000 ---p 00027000 08:06 394300                         /lib64/libk5crypto.so.3.1
328da27000-328da29000 rw-p 00027000 08:06 394300                         /lib64/libk5crypto.so.3.1
328ec00000-328eccf000 r-xp 00000000 08:06 394302                         /lib64/libkrb5.so.3.3
328eccf000-328eecf000 ---p 000cf000 08:06 394302                         /lib64/libkrb5.so.3.3
328eecf000-328eeda000 rw-p 000cf000 08:06 394302                         /lib64/libkrb5.so.3.3
328f000000-328f003000 r-xp 00000000 08:06 394301                         /lib64/libcom_err.so.2.1
328f003000-328f202000 ---p 00003000 08:06 394301                         /lib64/libcom_err.so.2.1
328f202000-328f203000 rw-p 00002000 08:06 394301                         /lib64/libcom_err.so.2.1
328f400000-328f40a000 r-xp 00000000 08:06 393785                         /lib64/libkrb5support.so.0.1
328f40a000-328f609000 ---p 0000a000 08:06 393785                         /lib64/libkrb5support.so.0.1
328f609000-328f60a000 rw-p 00009000 08:06 393785                         /lib64/libkrb5support.so.0.1
351ea00000-351ea1e000 r-xp 00000000 08:06 398307                         /lib64/ld-2.12.so
351ec1e000-351ec1f000 r--p 0001e000 08:06 398307                         /lib64/ld-2.12.so
351ec1f000-351ec20000 rw-p 0001f000 08:06 398307                         /lib64/ld-2.12.so
351ec20000-351ec21000 rw-p 00000000 00:00 0 
351ee00000-351ee01000 r-xp 00000000 08:06 391907                         /lib64/libaio.so.1.0.1
351ee01000-351f000000 ---p 00001000 08:06 391907                         /lib64/libaio.so.1.0.1
351f000000-351f001000 rw-p 00000000 08:06 391907                         /lib64/libaio.so.1.0.1
351f200000-351f375000 r-xp 00000000 08:06 398308                         /lib64/libc-2.12.so
351f375000-351f575000 ---p 00175000 08:06 398308                         /lib64/libc-2.12.so
351f575000-351f579000 r--p 00175000 08:06 398308                         /lib64/libc-2.12.so
351f579000-351f57a000 rw-p 00179000 08:06 398308                         /lib64/libc-2.12.so
351f57a000-351f57f000 rw-p 00000000 00:00 0 
351f600000-351f683000 r-xp 00000000 08:06 398327                         /lib64/libm-2.12.so
351f683000-351f882000 ---p 00083000 08:06 398327                         /lib64/libm-2.12.so
351f882000-351f883000 r--p 00082000 08:06 398327                         /lib64/libm-2.12.so
351f883000-351f884000 rw-p 00083000 08:06 398327                         /lib64/libm-2.12.so
351fa00000-351fa02000 r-xp 00000000 08:06 398310                         /lib64/libdl-2.12.so
351fa02000-351fc02000 ---p 00002000 08:06 398310                         /lib64/libdl-2.12.so
351fc02000-351fc03000 r--p 00002000 08:06 398310                         /lib64/libdl-2.12.so
351fc03000-351fc04000 rw-p 00003000 08:06 398310                         /lib64/libdl-2.12.so
351fe00000-351fe17000 r-xp 00000000 08:06 398316                         /lib64/libpthread-2.12.so
351fe17000-3520017000 ---p 00017000 08:06 398316                         /lib64/libpthread-2.12.so
3520017000-3520018000 r--p 00017000 08:06 398316                         /lib64/libpthread-2.12.so
3520018000-3520019000 rw-p 00018000 08:06 398316                         /lib64/libpthread-2.12.so
3520019000-352001d000 rw-p 00000000 00:00 0 
3520200000-3520215000 r-xp 00000000 08:06 398326                         /lib64/libz.so.1.2.3
3520215000-3520414000 ---p 00015000 08:06 398326                         /lib64/libz.so.1.2.3
3520414000-3520415000 rw-p 00014000 08:06 398326                         /lib64/libz.so.1.2.3
3520600000-3520607000 r-xp 00000000 08:06 398319                         /lib64/librt-2.12.so
3520607000-3520806000 ---p 00007000 08:06 398319                         /lib64/librt-2.12.so
3520806000-3520807000 r--p 00006000 08:06 398319                         /lib64/librt-2.12.so
3520807000-3520808000 rw-p 00007000 08:06 398319                         /lib64/librt-2.12.so
3520a00000-3520a1d000 r-xp 00000000 08:06 398313                         /lib64/libselinux.so.1
3520a1d000-3520c1c000 ---p 0001d000 08:06 398313                         /lib64/libselinux.so.1
3520c1c000-3520c1d000 r--p 0001c000 08:06 398313                         /lib64/libselinux.so.1
3520c1d000-3520c1e000 rw-p 0001d000 08:06 398313                         /lib64/libselinux.so.1
3520c1e000-3520c1f000 rw-p 00000000 00:00 0 
3520e00000-3520e16000 r-xp 00000000 08:06 398312                         /lib64/libresolv-2.12.so
3520e16000-3521016000 ---p 00016000 08:06 398312                         /lib64/libresolv-2.12.so
3521016000-3521017000 r--p 00016000 08:06 398312                         /lib64/libresolv-2.12.so
3521017000-3521018000 rw-p 00017000 08:06 398312                         /lib64/libresolv-2.12.so
3521018000-352101a000 rw-p 00000000 00:00 0 
3521e00000-3521e1b000 r-xp 00000000 08:06 691194                         /usr/lib64/libxcb.so.1.1.0
3521e1b000-352201a000 ---p 0001b000 08:06 691194                         /usr/lib64/libxcb.so.1.1.0
352201a000-352201b000 rw-p 0001a000 08:06 691194                         /usr/lib64/libxcb.so.1.1.0
3522600000-3522602000 r-xp 00000000 08:06 691193                         /usr/lib64/libXau.so.6.0.0
3522602000-3522802000 ---p 00002000 08:06 691193                         /usr/lib64/libXau.so.6.0.0
3522802000-3522803000 rw-p 00002000 08:06 691193                         /usr/lib64/libXau.so.6.0.0
3522a00000-3522b39000 r-xp 00000000 08:06 691195                         /usr/lib64/libX11.so.6.3.0
3522b39000-3522d39000 ---p 00139000 08:06 691195                         /usr/lib64/libX11.so.6.3.0
3522d39000-3522d3f000 rw-p 00139000 08:06 691195                         /usr/lib64/libX11.so.6.3.0
3522e00000-3522e26000 r-xp 00000000 08:06 691192                         /usr/lib64/libpng12.so.0.44.0
3522e26000-3523025000 ---p 00026000 08:06 691192                         /usr/lib64/libpng12.so.0.44.0
3523025000-3523026000 rw-p 00025000 08:06 691192                         /usr/lib64/libpng12.so.0.44.0
3529a00000-3529a32000 r-xp 00000000 08:06 398336                         /lib64/libidn.so.11.6.1
3529a32000-3529c31000 ---p 00032000 08:06 398336                         /lib64/libidn.so.11.6.1
3529c31000-3529c32000 rw-p 00031000 08:06 398336                         /lib64/libidn.so.11.6.1
352a200000-352a216000 r-xp 00000000 08:06 398354                         /lib64/libgcc_s-4.4.4-20100726.so.1
352a216000-352a415000 ---p 00016000 08:06 398354                         /lib64/libgcc_s-4.4.4-20100726.so.1
352a415000-352a416000 rw-p 00015000 08:06 398354                         /lib64/libgcc_s-4.4.4-20100726.so.1
352a600000-352a771000 r-xp 00000000 08:06 691225                         /usr/lib64/libcrypto.so.1.0.0
352a771000-352a970000 ---p 00171000 08:06 691225                         /usr/lib64/libcrypto.so.1.0.0
352a970000-352a993000 rw-p 00170000 08:06 691225                         /usr/lib64/libcrypto.so.1.0.0
352a993000-352a996000 rw-p 00000000 00:00 0 
352ae00000-352ae02000 r-xp 00000000 08:06 398311                         /lib64/libkeyutils.so.1.3
352ae02000-352b001000 ---p 00002000 08:06 398311                         /lib64/libkeyutils.so.1.3
352b001000-352b002000 rw-p 00001000 08:06 398311                         /lib64/libkeyutils.so.1.3
352ba00000-352ba04000 r-xp 00000000 08:06 398334                         /lib64/libuuid.so.1.3.0
352ba04000-352bc03000 ---p 00004000 08:06 398334                         /lib64/libuuid.so.1.3.0
352bc03000-352bc04000 rw-p 00003000 08:06 398334                         /lib64/libuuid.so.1.3.0
352c600000-352c607000 r-xp 00000000 08:06 398331                         /lib64/libcrypt-2.12.so
352c607000-352c807000 ---p 00007000 08:06 398331                         /lib64/libcrypt-2.12.so
352c807000-352c808000 r--p 00007000 08:06 398331                         /lib64/libcrypt-2.12.so
352c808000-352c809000 rw-p 00008000 08:06 398331                         /lib64/libcrypt-2.12.so
352c809000-352c837000 rw-p 00000000 00:00 0 
352ca00000-352ca58000 r-xp 00000000 08:06 398330                         /lib64/libfreebl3.so
352ca58000-352cc57000 ---p 00058000 08:06 398330                         /lib64/libfreebl3.so
352cc57000-352cc59000 rw-p 00057000 08:06 398330                         /lib64/libfreebl3.so
352cc59000-352cc5d000 rw-p 00000000 00:00 0 
352da00000-352da24000 r-xp 00000000 08:06 659699                         /usr/lib64/libjpeg.so.62.0.0
352da24000-352dc23000 ---p 00024000 08:06 659699                         /usr/lib64/libjpeg.so.62.0.0
352dc23000-352dc24000 rw-p 00023000 08:06 659699                         /usr/lib64/libjpeg.so.62.0.0
352e600000-352e604000 r-xp 00000000 08:06 392061                         /lib64/libattr.so.1.1.0
352e604000-352e803000 ---p 00004000 08:06 392061                         /lib64/libattr.so.1.1.0
352e803000-352e804000 rw-p 00003000 08:06 392061                         /lib64/libattr.so.1.1.0
352ea00000-352ea04000 r-xp 00000000 08:06 398338                         /lib64/libplc4.so
352ea04000-352ec03000 ---p 00004000 08:06 398338                         /lib64/libplc4.so
352ec03000-352ec04000 rw-p 00003000 08:06 398338                         /lib64/libplc4.so
352ee00000-352ee1d000 r-xp 00000000 08:06 398342                         /lib64/libtinfo.so.5.7
352ee1d000-352f01d000 ---p 0001d000 08:06 398342                         /lib64/libtinfo.so.5.7
352f01d000-352f021000 rw-p 0001d000 08:06 398342                         /lib64/libtinfo.so.5.7
352f200000-352f222000 r-xp 00000000 08:06 398343                         /lib64/libncurses.so.5.7
352f222000-352f421000 ---p 00022000 08:06 398343                         /lib64/libncurses.so.5.7
352f421000-352f422000 rw-p 00021000 08:06 398343                         /lib64/libncurses.so.5.7
352f600000-352f733000 r-xp 00000000 08:06 691248                         /usr/lib64/libnss3.so
352f733000-352f932000 ---p 00133000 08:06 691248                         /usr/lib64/libnss3.so
352f932000-352f939000 rw-p 00132000 08:06 691248                         /usr/lib64/libnss3.so
352f939000-352f93a000 rw-p 00000000 00:00 0 
352fa00000-352fa38000 r-xp 00000000 08:06 398337                         /lib64/libnspr4.so
352fa38000-352fc38000 ---p 00038000 08:06 398337                         /lib64/libnspr4.so
352fc38000-352fc3a000 rw-p 00038000 08:06 398337                         /lib64/libnspr4.so
352fc3a000-352fc3d000 rw-p 00000000 00:00 0 
3530200000-3530203000 r-xp 00000000 08:06 398339                         /lib64/libplds4.so
3530203000-3530402000 ---p 00003000 08:06 398339                         /lib64/libplds4.so
3530402000-3530403000 rw-p 00002000 08:06 398339                         /lib64/libplds4.so
3530600000-3530632000 r-xp 00000000 08:06 691249                         /usr/lib64/libssl3.so
3530632000-3530831000 ---p 00032000 08:06 691249                         /usr/lib64/libssl3.so
3530831000-3530834000 rw-p 00031000 08:06 691249                         /usr/lib64/libssl3.so
3530a00000-3530a28000 r-xp 00000000 08:06 691250                         /usr/lib64/libsmime3.so
3530a28000-3530c27000 ---p 00028000 08:06 691250                         /usr/lib64/libsmime3.so
3530c27000-3530c2b000 rw-p 00027000 08:06 691250                         /usr/lib64/libsmime3.so
3530e00000-3530e0d000 r-xp 00000000 08:06 678871                         /usr/lib64/liblber-2.4.so.2.5.2
3530e0d000-353100d000 ---p 0000d000 08:06 678871                         /usr/lib64/liblber-2.4.so.2.5.2
353100d000-353100e000 rw-p 0000d000 08:06 678871                         /usr/lib64/liblber-2.4.so.2.5.2
3531200000-353121a000 r-xp 00000000 08:06 691247                         /usr/lib64/libnssutil3.so
353121a000-3531419000 ---p 0001a000 08:06 691247                         /usr/lib64/libnssutil3.so
3531419000-353141f000 rw-p 00019000 08:06 691247                         /usr/lib64/libnssutil3.so
3532600000-3532610000 r-xp 00000000 08:06 659689                         /usr/lib64/libtasn1.so.3.1.6
3532610000-3532810000 ---p 00010000 08:06 659689                         /usr/lib64/libtasn1.so.3.1.6
3532810000-3532811000 rw-p 00010000 08:06 659689                         /usr/lib64/libtasn1.so.3.1.6
35fd000000-35fd002000 r-xp 00000000 08:06 391735                         /lib64/libutil-2.12.so
35fd002000-35fd201000 ---p 00002000 08:06 391735                         /lib64/libutil-2.12.so
35fd201000-35fd202000 r--p 00001000 08:06 391735                         /lib64/libutil-2.12.so
35fd202000-35fd203000 rw-p 00002000 08:06 391735                         /lib64/libutil-2.12.so
38c3600000-38c366d000 r-xp 00000000 08:06 686286                         /usr/lib64/libSDL-1.2.so.0.11.3
38c366d000-38c386c000 ---p 0006d000 08:06 686286                         /usr/lib64/libSDL-1.2.so.0.11.3
38c386c000-38c386e000 rw-p 0006c000 08:06 686286                         /usr/lib64/libSDL-1.2.so.0.11.3
38c386e000-38c389e000 rw-p 00000000 00:00 0 
3ccea00000-3ccea43000 r-xp 00000000 08:06 674604                         /usr/lib64/libldap-2.4.so.2.5.2
3ccea43000-3ccec42000 ---p 00043000 08:06 674604                         /usr/lib64/libldap-2.4.so.2.5.2
3ccec42000-3ccec44000 rw-p 00042000 08:06 674604                         /usr/lib64/libldap-2.4.so.2.5.2
3ccee00000-3ccee26000 r-xp 00000000 08:06 684897                         /usr/lib64/libssh2.so.1.0.1
3ccee26000-3ccf026000 ---p 00026000 08:06 684897                         /usr/lib64/libssh2.so.1.0.1
3ccf026000-3ccf027000 rw-p 00026000 08:06 684897                         /usr/lib64/libssh2.so.1.0.1
3ccf200000-3ccf251000 r-xp 00000000 08:06 691226                         /usr/lib64/libcurl.so.4.1.1
3ccf251000-3ccf450000 ---p 00051000 08:06 691226                         /usr/lib64/libcurl.so.4.1.1
3ccf450000-3ccf453000 rw-p 00050000 08:06 691226                         /usr/lib64/libcurl.so.4.1.1
3f26600000-3f26619000 r-xp 00000000 08:06 662133                         /usr/lib64/libsasl2.so.2.0.23
3f26619000-3f26819000 ---p 00019000 08:06 662133                         /usr/lib64/libsasl2.so.2.0.23
3f26819000-3f2681a000 rw-p 00019000 08:06 662133                         /usr/lib64/libsasl2.so.2.0.23
3f26e00000-3f26f7c000 r-xp 00000000 08:06 395334                         /lib64/libdb-4.8.so
3f26f7c000-3f2717c000 ---p 0017c000 08:06 395334                         /lib64/libdb-4.8.so
3f2717c000-3f27181000 rw-p 0017c000 08:06 395334                         /lib64/libdb-4.8.so
3f29e00000-3f29e03000 r-xp 00000000 08:06 395336                         /lib64/libgpg-error.so.0.5.0
3f29e03000-3f2a002000 ---p 00003000 08:06 395336                         /lib64/libgpg-error.so.0.5.0
3f2a002000-3f2a003000 rw-p 00002000 08:06 395336                         /lib64/libgpg-error.so.0.5.0
3f2a800000-3f2a89b000 r-xp 00000000 08:06 672202                         /usr/lib64/libgnutls.so.26.14.12
3f2a89b000-3f2aa9a000 ---p 0009b000 08:06 672202                         /usr/lib64/libgnutls.so.26.14.12
3f2aa9a000-3f2aaa1000 rw-p 0009a000 08:06 672202                         /usr/lib64/libgnutls.so.26.14.12
3f2ac00000-3f2ac72000 r-xp 00000000 08:06 395337                         /lib64/libgcrypt.so.11.5.3
3f2ac72000-3f2ae71000 ---p 00072000 08:06 395337                         /lib64/libgcrypt.so.11.5.3
3f2ae71000-3f2ae75000 rw-p 00071000 08:06 395337                         /lib64/libgcrypt.so.11.5.3
7fb17c000000-7fb17c021000 rw-p 00000000 00:00 0 
7fb17c021000-7fb180000000 ---p 00000000 00:00 0 
7fb181610000-7fb18161c000 r-xp 00000000 08:06 661352                     /usr/lib64/sasl2/libdigestmd5.so.2.0.23
7fb18161c000-7fb18181b000 ---p 0000c000 08:06 661352                     /usr/lib64/sasl2/libdigestmd5.so.2.0.23
7fb18181b000-7fb18181c000 rw-p 0000b000 08:06 661352                     /usr/lib64/sasl2/libdigestmd5.so.2.0.23
7fb18181c000-7fb181820000 r-xp 00000000 08:06 661349                     /usr/lib64/sasl2/libcrammd5.so.2.0.23
7fb181820000-7fb181a20000 ---p 00004000 08:06 661349                     /usr/lib64/sasl2/libcrammd5.so.2.0.23
7fb181a20000-7fb181a21000 rw-p 00004000 08:06 661349                     /usr/lib64/sasl2/libcrammd5.so.2.0.23
7fb181a21000-7fb181a25000 r-xp 00000000 08:06 657587                     /usr/lib64/sasl2/libanonymous.so.2.0.23
7fb181a25000-7fb181c24000 ---p 00004000 08:06 657587                     /usr/lib64/sasl2/libanonymous.so.2.0.23
7fb181c24000-7fb181c25000 rw-p 00003000 08:06 657587                     /usr/lib64/sasl2/libanonymous.so.2.0.23
7fb181c25000-7fb181c29000 r-xp 00000000 08:06 686571                     /usr/lib64/sasl2/liblogin.so.2.0.23
7fb181c29000-7fb181e28000 ---p 00004000 08:06 686571                     /usr/lib64/sasl2/liblogin.so.2.0.23
7fb181e28000-7fb181e29000 rw-p 00003000 08:06 686571                     /usr/lib64/sasl2/liblogin.so.2.0.23
7fb181e29000-7fb181e2d000 r-xp 00000000 08:06 686574                     /usr/lib64/sasl2/libplain.so.2.0.23
7fb181e2d000-7fb18202c000 ---p 00004000 08:06 686574                     /usr/lib64/sasl2/libplain.so.2.0.23
7fb18202c000-7fb18202d000 rw-p 00003000 08:06 686574                     /usr/lib64/sasl2/libplain.so.2.0.23
7fb18202d000-7fb182034000 r-xp 00000000 08:06 659871                     /usr/lib64/sasl2/libgssapiv2.so.2.0.23
7fb182034000-7fb182233000 ---p 00007000 08:06 659871                     /usr/lib64/sasl2/libgssapiv2.so.2.0.23
7fb182233000-7fb182234000 rw-p 00006000 08:06 659871                     /usr/lib64/sasl2/libgssapiv2.so.2.0.23
7fb182234000-7fb182239000 r-xp 00000000 08:06 657590                     /usr/lib64/sasl2/libsasldb.so.2.0.23
7fb182239000-7fb182438000 ---p 00005000 08:06 657590                     /usr/lib64/sasl2/libsasldb.so.2.0.23
7fb182438000-7fb182439000 rw-p 00004000 08:06 657590                     /usr/lib64/sasl2/libsasldb.so.2.0.23
7fb182439000-7fb18243a000 ---p 00000000 00:00 0 
7fb18243a000-7fb182fd8000 rw-p 00000000 00:00 0 
7fb182feb000-7fb182fec000 rw-p 00000000 00:00 0 
7fb182fec000-7fb1837ec000 rw-p 00000000 00:00 0 
7fb1837ec000-7fb1837ee000 rw-p 00000000 00:00 0 
7fb1837ee000-7fb18380e000 rw-p 00000000 00:00 0 
7fb18380e000-7fb183810000 rw-p 00000000 00:00 0 
7fb183810000-7fb183830000 rw-p 00000000 00:00 0 
7fb183830000-7fb183853000 rw-p 00000000 00:00 0 
7fb183853000-7fb1a3853000 rw-p 00000000 00:00 0 
7fb1a3853000-7fb1a3854000 rw-p 00000000 00:00 0 
7fb1a3854000-7fb1a3857000 rw-s 00000000 00:09 3567                       anon_inode:kvm-vcpu
7fb1a3857000-7fb1ab27b000 rw-p 00000000 00:00 0 
7fb1ab27b000-7fb1ab287000 r-xp 00000000 08:06 391711                     /lib64/libnss_files-2.12.so
7fb1ab287000-7fb1ab486000 ---p 0000c000 08:06 391711                     /lib64/libnss_files-2.12.so
7fb1ab486000-7fb1ab487000 r--p 0000b000 08:06 391711                     /lib64/libnss_files-2.12.so
7fb1ab487000-7fb1ab488000 rw-p 0000c000 08:06 391711                     /lib64/libnss_files-2.12.so
7fb1ab488000-7fb1ab49e000 rw-p 00000000 00:00 0 
7fb1ab4b2000-7fb1ab4b5000 rw-s 00000000 00:04 304955                     /dev/zero (deleted)
7fb1ab4b5000-7fb1ab4b6000 rw-p 00000000 00:00 0 
7fff99e5f000-7fff99e74000 rw-p 00000000 00:00 0                          [stack]
7fff99f5f000-7fff99f60000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]

>      return qdev_unplug(dev);
>  }
>  
> 
>