Description of problem: Sorry I don't have much to go on, but qemu-kvm just crashed for me in regular usage in a very strange way. *** glibc detected *** /usr/bin/qemu-kvm: corrupted double-linked list: 0x00007f9a85a16a30 *** ======= Backtrace: ========= /lib64/libc.so.6(+0x30e127d6ad)[0x7f9a7d0c16ad] /lib64/libc.so.6(+0x30e127e078)[0x7f9a7d0c2078] /usr/bin/qemu-kvm(+0x98a95)[0x7f9a82945a95] /usr/bin/qemu-kvm(+0x9e2ba)[0x7f9a8294b2ba] /usr/bin/qemu-kvm(+0x8d568)[0x7f9a8293a568] /usr/bin/qemu-kvm(+0x8d630)[0x7f9a8293a630] /usr/bin/qemu-kvm(main+0x1429)[0x7f9a829229b9] /lib64/libc.so.6(__libc_start_main+0xf5)[0x7f9a7d065ba5] /usr/bin/qemu-kvm(+0x79299)[0x7f9a82926299] ======= Memory map: ======== 7f9a24000000-7f9a24021000 rw-p 00000000 00:00 0 7f9a24021000-7f9a28000000 ---p 00000000 00:00 0 7f9a2c000000-7f9a2c021000 rw-p 00000000 00:00 0 7f9a2c021000-7f9a30000000 ---p 00000000 00:00 0 7f9a30000000-7f9a30021000 rw-p 00000000 00:00 0 7f9a30021000-7f9a34000000 ---p 00000000 00:00 0 7f9a377ff000-7f9a37800000 ---p 00000000 00:00 0 7f9a37800000-7f9a38000000 rw-p 00000000 00:00 0 7f9a38000000-7f9a38021000 rw-p 00000000 00:00 0 7f9a38021000-7f9a3c000000 ---p 00000000 00:00 0 7f9a3c000000-7f9a3c021000 rw-p 00000000 00:00 0 7f9a3c021000-7f9a40000000 ---p 00000000 00:00 0 7f9a40000000-7f9a40021000 rw-p 00000000 00:00 0 7f9a40021000-7f9a44000000 ---p 00000000 00:00 0 7f9a441f6000-7f9a441f7000 ---p 00000000 00:00 0 7f9a441f7000-7f9a449f7000 rw-p 00000000 00:00 0 7f9a449f7000-7f9a449f8000 ---p 00000000 00:00 0 7f9a449f8000-7f9a451f8000 rw-p 00000000 00:00 0 7f9a451f8000-7f9a451f9000 ---p 00000000 00:00 0 7f9a451f9000-7f9a459f9000 rw-p 00000000 00:00 0 7f9a459f9000-7f9a459fa000 ---p 00000000 00:00 0 7f9a459fa000-7f9a461fa000 rw-p 00000000 00:00 0 7f9a461fa000-7f9a461fb000 ---p 00000000 00:00 0 7f9a461fb000-7f9a469fb000 rw-p 00000000 00:00 0 7f9a469fb000-7f9a469fc000 ---p 00000000 00:00 0 7f9a469fc000-7f9a471fc000 rw-p 00000000 00:00 0 7f9a471fc000-7f9a471fd000 ---p 00000000 00:00 0 7f9a471fd000-7f9a479fd000 rw-p 00000000 00:00 0 7f9a479fd000-7f9a479fe000 ---p 00000000 00:00 0 7f9a479fe000-7f9a481fe000 rw-p 00000000 00:00 0 7f9a481fe000-7f9a481ff000 ---p 00000000 00:00 0 7f9a481ff000-7f9a48a00000 rw-p 00000000 00:00 0 7f9a48a00000-7f9a67e00000 rw-p 00000000 00:00 0 7f9a67e00000-7f9a68000000 rw-p 00000000 00:00 0 7f9a68000000-7f9a6b389000 rw-p 00000000 00:00 0 7f9a6b389000-7f9a6c000000 ---p 00000000 00:00 0 7f9a6c000000-7f9a6c021000 rw-p 00000000 00:00 0 7f9a6c021000-7f9a70000000 ---p 00000000 00:00 0 7f9a70000000-7f9a70021000 rw-p 00000000 00:00 0 7f9a70021000-7f9a74000000 ---p 00000000 00:00 0 7f9a745bb000-7f9a745bc000 ---p 00000000 00:00 0 7f9a745bc000-7f9a7529f000 rw-p 00000000 00:00 0 7f9a7529f000-7f9a752a0000 ---p 00000000 00:00 0 7f9a752a0000-7f9a75ca1000 rw-p 00000000 00:00 0 7f9a75ca1000-7f9a75ca2000 ---p 00000000 00:00 0 7f9a75ca2000-7f9a764a2000 rw-p 00000000 00:00 0 7f9a764a2000-7f9a764c0000 r-xp 00000000 fd:01 159275 /usr/lib64/libselinux.so.1 7f9a764c0000-7f9a766bf000 ---p 0001e000 fd:01 159275 /usr/lib64/libselinux.so.1 7f9a766bf000-7f9a766c0000 r--p 0001d000 fd:01 159275 /usr/lib64/libselinux.so.1 7f9a766c0000-7f9a766c1000 rw-p 0001e000 fd:01 159275 /usr/lib64/libselinux.so.1 7f9a766c1000-7f9a766c3000 rw-p 00000000 00:00 0 7f9a766c3000-7f9a76720000 r-xp 00000000 fd:01 144042 /usr/lib64/libfreebl3.so 7f9a76720000-7f9a76920000 ---p 0005d000 fd:01 144042 /usr/lib64/libfreebl3.so 7f9a76920000-7f9a76921000 r--p 0005d000 fd:01 144042 /usr/lib64/libfreebl3.so 7f9a76921000-7f9a76922000 rw-p 0005e000 fd:01 144042 /usr/lib64/libfreebl3.so 7f9a76922000-7f9a76926000 rw-p 00000000 00:00 0 7f9a76926000-7f9a7692c000 r-xp 00000000 fd:01 170528 /usr/lib64/libogg.so.0.8.0 7f9a7692c000-7f9a76b2b000 ---p 00006000 fd:01 170528 /usr/lib64/libogg.so.0.8.0 7f9a76b2b000-7f9a76b2c000 r--p 00005000 fd:01 170528 /usr/lib64/libogg.so.0.8.0 7f9a76b2c000-7f9a76b2d000 rw-p 00006000 fd:01 170528 /usr/lib64/libogg.so.0.8.0 7f9a76b2d000-7f9a76b59000 r-xp 00000000 fd:01 170531 /usr/lib64/libvorbis.so.0.4.6 7f9a76b59000-7f9a76d58000 ---p 0002c000 fd:01 170531 /usr/lib64/libvorbis.so.0.4.6 7f9a76d58000-7f9a76d59000 r--p 0002b000 fd:01 170531 /usr/lib64/libvorbis.so.0.4.6 7f9a76d59000-7f9a76d5a000 rw-p 0002c000 fd:01 170531 /usr/lib64/libvorbis.so.0.4.6 7f9a76d5a000-7f9a7700d000 r-xp 00000000 fd:01 140208 /usr/lib64/libvorbisenc.so.2.0.9 7f9a7700d000-7f9a7720c000 ---p 002b3000 fd:01 140208 /usr/lib64/libvorbisenc.so.2.0.9 7f9a7720c000-7f9a77228000 r--p 002b2000 fd:01 140208 /usr/lib64/libvorbisenc.so.2.0.9 7f9a77228000-7f9a77229000 rw-p 002ce000 fd:01 140208 /usr/lib64/libvorbisenc.so.2.0.9 7f9a77229000-7f9a77262000 r-xp 00000000 fd:01 175516 /usr/lib64/libFLAC.so.8.2.0 7f9a77262000-7f9a77461000 ---p 00039000 fd:01 175516 /usr/lib64/libFLAC.so.8.2.0 7f9a77461000-7f9a77462000 r--p 00038000 fd:01 175516 /usr/lib64/libFLAC.so.8.2.0 7f9a77462000-7f9a77463000 rw-p 00039000 fd:01 175516 /usr/lib64/libFLAC.so.8.2.0 7f9a77463000-7f9a7746e000 r-xp 00000000 fd:01 175515 /usr/lib64/libgsm.so.1.0.12 7f9a7746e000-7f9a7766d000 ---p 0000b000 fd:01 175515 /usr/lib64/libgsm.so.1.0.12 7f9a7766d000-7f9a7766e000 rw-p 0000a000 fd:01 175515 /usr/lib64/libgsm.so.1.0.12 7f9a7766e000-7f9a77685000 r-xp 00000000 fd:01 162518 /usr/lib64/libnsl-2.15.90.so 7f9a77685000-7f9a77884000 ---p 00017000 fd:01 162518 /usr/lib64/libnsl-2.15.90.so 7f9a77884000-7f9a77885000 r--p 00016000 fd:01 162518 /usr/lib64/libnsl-2.15.90.so 7f9a77885000-7f9a77886000 rw-p 00017000 fd:01 162518 /usr/lib64/libnsl-2.15.90.so 7f9a77886000-7f9a77888000 rw-p 00000000 00:00 0 7f9a77888000-7f9a77896000 r-xp 00000000 fd:01 159280 /usr/lib64/libXi.so.6.1.0 7f9a77896000-7f9a77a95000 ---p 0000e000 fd:01 159280 /usr/lib64/libXi.so.6.1.0 7f9a77a95000-7f9a77a96000 r--p 0000d000 fd:01 159280 /usr/lib64/libXi.so.6.1.0 7f9a77a96000-7f9a77a97000 rw-p 0000e000 fd:01 159280 /usr/lib64/libXi.so.6.1.0 7f9a77a97000-7f9a77aa7000 r-xp 00000000 fd:01 159278 /usr/lib64/libXext.so.6.4.0 7f9a77aa7000-7f9a77ca7000 ---p 00010000 fd:01 159278 /usr/lib64/libXext.so.6.4.0 7f9a77ca7000-7f9a77ca8000 r--p 00010000 fd:01 159278 /usr/lib64/libXext.so.6.4.0 7f9a77ca8000-7f9a77ca9000 rw-p 00011000 fd:01 159278 /usr/lib64/libXext.so.6.4.0 7f9a77ca9000-7f9a77cab000 r-xp 00000000 fd:01 159264 /usr/lib64/libXau.so.6.0.0 7f9a77cab000-7f9a77eab000 ---p 00002000 fd:01 159264 /usr/lib64/libXau.so.6.0.0 7f9a77eab000-7f9a77eac000 r--p 00002000 fd:01 159264 /usr/lib64/libXau.so.6.0.0 7f9a77eac000-7f9a77ead000 rw-p 00003000 fd:01 159264 /usr/lib64/libXau.so.6.0.0 7f9a77ead000-7f9a77eb0000 r-xp 00000000 fd:01 162125 /usr/lib64/libkeyutils.so.1.4 7f9a77eb0000-7f9a780af000 ---p 00003000 fd:01 162125 /usr/lib64/libkeyutils.so.1.4 7f9a780af000-7f9a780b0000 rw-p 00002000 fd:01 162125 /usr/lib64/libkeyutils.so.1.4 7f9a780b0000-7f9a780ba000 r-xp 00000000 fd:01 162126 /usr/lib64/libkrb5support.so.0.1 7f9a780ba000-7f9a782b9000 ---p 0000a000 fd:01 162126 /usr/lib64/libkrb5support.so.0.1 7f9a782b9000-7f9a782ba000 r--p 00009000 fd:01 162126 /usr/lib64/libkrb5support.so.0.1 7f9a782ba000-7f9a782bb000 rw-p 0000a000 fd:01 162126 /usr/lib64/libkrb5support.so.0.1 7f9a782bb000-7f9a78456000 r-xp 00000000 fd:01 166039 /usr/lib64/libcrypto.so.1.0.1c 7f9a78456000-7f9a78655000 ---p 0019b000 fd:01 166039 /usr/lib64/libcrypto.so.1.0.1c 7f9a78655000-7f9a7866f000 r--p 0019a000 fd:01 166039 /usr/lib64/libcrypto.so.1.0.1c 7f9a7866f000-7f9a7867a000 rw-p 001b4000 fd:01 166039 /usr/lib64/libcrypto.so.1.0.1c 7f9a7867a000-7f9a7867f000 rw-p 00000000 00:00 0 7f9a7867f000-7f9a786da000 r-xp 00000000 fd:01 166575 /usr/lib64/libssl.so.1.0.1c 7f9a786da000-7f9a788d9000 ---p 0005b000 fd:01 166575 /usr/lib64/libssl.so.1.0.1c 7f9a788d9000-7f9a788dd000 r--p 0005a000 fd:01 166575 /usr/lib64/libssl.so.1.0.1c 7f9a788dd000-7f9a788e3000 rw-p 0005e000 fd:01 166575 /usr/lib64/libssl.so.1.0.1c 7f9a788e3000-7f9a78963000 r-xp 00000000 fd:01 159258 /usr/lib64/libpixman-1.so.0.24.4 7f9a78963000-7f9a78b62000 ---p 00080000 fd:01 159258 /usr/lib64/libpixman-1.so.0.24.4 7f9a78b62000-7f9a78b68000 r--p 0007f000 fd:01 159258 /usr/lib64/libpixman-1.so.0.24.4 7f9a78b68000-7f9a78b69000 rw-p 00085000 fd:01 159258 /usr/lib64/libpixman-1.so.0.24.4 7f9a78b69000-7f9a78b77000 r-xp 00000000 fd:01 175524 /usr/lib64/libcelt051.so.0.0.0 7f9a78b77000-7f9a78d76000 ---p 0000e000 fd:01 175524 /usr/lib64/libcelt051.so.0.0.0 7f9a78d76000-7f9a78d77000 r--p 0000d000 fd:01 175524 /usr/lib64/libcelt051.so.0.0.0 7f9a78d77000-7f9a78d78000 rw-p 0000e000 fd:01 175524 /usr/lib64/libcelt051.so.0.0.0 7f9a78d78000-7f9a78d89000 r-xp 00000000 fd:01 165847 /usr/lib64/libp11-kit.so.0.0.0 7f9a78d89000-7f9a78f88000 ---p 00011000 fd:01 165847 /usr/lib64/libp11-kit.so.0.0.0 7f9a78f88000-7f9a78f89000 r--p 00010000 fd:01 165847 /usr/lib64/libp11-kit.so.0.0.0 7f9a78f89000-7f9a78f8a000 rw-p 00011000 fd:01 165847 /usr/lib64/libp11-kit.so.0.0.0 7f9a78f8a000-7f9a78f8d000 r-xp 00000000 fd:01 165640 /usr/lib64/libgpg-error.so.0.8.0 7f9a78f8d000-7f9a7918c000 ---p 00003000 fd:01 165640 /usr/lib64/libgpg-error.so.0.8.0 7f9a7918c000-7f9a7918d000 r--p 00002000 fd:01 165640 /usr/lib64/libgpg-error.so.0.8.0 7f9a7918d000-7f9a7918e000 rw-p 00003000 fd:01 165640 /usr/lib64/libgpg-error.so.0.8.0 7f9a7918e000-7f9a79203000 r-xp 00000000 fd:01 165798 /usr/lib64/libgcrypt.so.11.7.0 7f9a79203000-7f9a79402000 ---p 00075000 fd:01 165798 /usr/lib64/libgcrypt.so.11.7.0 7f9a79402000-7f9a79403000 r--p 00074000 fd:01 165798 /usr/lib64/libgcrypt.so.11.7.0 7f9a79403000-7f9a79406000 rw-p 00075000 fd:01 165798 /usr/lib64/libgcrypt.so.11.7.0 7f9a79406000-7f9a79415000 r-xp 00000000 fd:01 165639 /usr/lib64/libtasn1.so.3.1.15 7f9a79415000-7f9a79615000 ---p 0000f000 fd:01 165639 /usr/lib64/libtasn1.so.3.1.15 7f9a79615000-7f9a79616000 r--p 0000f000 fd:01 165639 /usr/lib64/libtasn1.so.3.1.15 7f9a79616000-7f9a79617000 rw-p 00010000 fd:01 165639 /usr/lib64/libtasn1.so.3.1.15 7f9a79617000-7f9a7961f000 r-xp 00000000 fd:01 162116 /usr/lib64/libcrypt-2.15.90.so 7f9a7961f000-7f9a7981e000 ---p 00008000 fd:01 162116 /usr/lib64/libcrypt-2.15.90.so 7f9a7981e000-7f9a7981f000 r--p 00007000 fd:01 162116 /usr/lib64/libcrypt-2.15.90.so 7f9a7981f000-7f9a79820000 rw-p 00008000 fd:01 162116 /usr/lib64/libcrypt-2.15.90.so 7f9a79820000-7f9a7984e000 rw-p 00000000 00:00 0 7f9a7984e000-7f9a79864000 r-xp 00000000 fd:01 159276 /usr/lib64/libresolv-2.15.90.so 7f9a79864000-7f9a79a64000 ---p 00016000 fd:01 159276 /usr/lib64/libresolv-2.15.90.so 7f9a79a64000-7f9a79a65000 r--p 00016000 fd:01 159276 /usr/lib64/libresolv-2.15.90.so 7f9a79a65000-7f9a79a66000 rw-p 00017000 fd:01 159276 /usr/lib64/libresolv-2.15.90.so 7f9a79a66000-7f9a79a68000 rw-p 00000000 00:00 0 7f9a79a68000-7f9a79aac000 r-xp 00000000 fd:01 165455 /usr/lib64/libdbus-1.so.3.7.1 7f9a79aac000-7f9a79cab000 ---p 00044000 fd:01 165455 /usr/lib64/libdbus-1.so.3.7.1 7f9a79cab000-7f9a79cac000 r--p 00043000 fd:01 165455 /usr/lib64/libdbus-1.so.3.7.1 7f9a79cac000-7f9a79cad000 rw-p 00044000 fd:01 165455 /usr/lib64/libdbus-1.so.3.7.1 7f9a79cad000-7f9a79cb2000 r-xp 00000000 fd:01 175517 /usr/lib64/libasyncns.so.0.3.1 7f9a79cb2000-7f9a79eb1000 ---p 00005000 fd:01 175517 /usr/lib64/libasyncns.so.0.3.1 7f9a79eb1000-7f9a79eb2000 r--p 00004000 fd:01 175517 /usr/lib64/libasyncns.so.0.3.1 7f9a79eb2000-7f9a79eb3000 rw-p 00005000 fd:01 175517 /usr/lib64/libasyncns.so.0.3.1 7f9a79eb3000-7f9a79f08000 r-xp 00000000 fd:01 165799 /usr/lib64/libsndfile.so.1.0.25 7f9a79f08000-7f9a7a108000 ---p 00055000 fd:01 165799 /usr/lib64/libsndfile.so.1.0.25 7f9a7a108000-7f9a7a10a000 r--p 00055000 fd:01 165799 /usr/lib64/libsndfile.so.1.0.25 7f9a7a10a000-7f9a7a10b000 rw-p 00057000 fd:01 165799 /usr/lib64/libsndfile.so.1.0.25 7f9a7a10b000-7f9a7a10f000 rw-p 00000000 00:00 0 7f9a7a10f000-7f9a7a118000 r-xp 00000000 fd:01 175514 /usr/lib64/libwrap.so.0.7.6 7f9a7a118000-7f9a7a317000 ---p 00009000 fd:01 175514 /usr/lib64/libwrap.so.0.7.6 7f9a7a317000-7f9a7a318000 r--p 00008000 fd:01 175514 /usr/lib64/libwrap.so.0.7.6 7f9a7a318000-7f9a7a319000 rw-p 00009000 fd:01 175514 /usr/lib64/libwrap.so.0.7.6 7f9a7a319000-7f9a7a31a000 rw-p 00000000 00:00 0 7f9a7a31a000-7f9a7a31f000 r-xp 00000000 fd:01 170606 /usr/lib64/libXtst.so.6.1.0 7f9a7a31f000-7f9a7a51e000 ---p 00005000 fd:01 170606 /usr/lib64/libXtst.so.6.1.0 7f9a7a51e000-7f9a7a51f000 r--p 00004000 fd:01 170606 /usr/lib64/libXtst.so.6.1.0 7f9a7a51f000-7f9a7a520000 rw-p 00005000 fd:01 170606 /usr/lib64/libXtst.so.6.1.0 7f9a7a520000-7f9a7a527000 r-xp 00000000 fd:01 163033 /usr/lib64/libSM.so.6.0.1 7f9a7a527000-7f9a7a726000 ---p 00007000 fd:01 163033 /usr/lib64/libSM.so.6.0.1 7f9a7a726000-7f9a7a727000 r--p 00006000 fd:01 163033 /usr/lib64/libSM.so.6.0.1 7f9a7a727000-7f9a7a728000 rw-p 00007000 fd:01 163033 /usr/lib64/libSM.so.6.0.1 7f9a7a728000-7f9a7a73f000 r-xp 00000000 fd:01 163031 /usr/lib64/libICE.so.6.3.0 7f9a7a73f000-7f9a7a93e000 ---p 00017000 fd:01 163031 /usr/lib64/libICE.so.6.3.0 7f9a7a93e000-7f9a7a93f000 r--p 00016000 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7f9a80526000-7f9a80726000 ---p 0001d000 fd:01 163295 /usr/lib64/librbd.so.1.0.0 7f9a80726000-7f9a80727000 rw-p 0001d000 fd:01 163295 /usr/lib64/librbd.so.1.0.0 7f9a80727000-7f9a80729000 r-xp 00000000 fd:01 167813 /usr/lib64/libutil-2.15.90.so 7f9a80729000-7f9a80928000 ---p 00002000 fd:01 167813 /usr/lib64/libutil-2.15.90.so 7f9a80928000-7f9a80929000 r--p 00001000 fd:01 167813 /usr/lib64/libutil-2.15.90.so 7f9a80929000-7f9a8092a000 rw-p 00002000 fd:01 167813 /usr/lib64/libutil-2.15.90.so 7f9a8092a000-7f9a8092f000 r-xp 00000000 fd:01 140212 /usr/lib64/libusbredirparser.so.0.0.0 7f9a8092f000-7f9a80b2e000 ---p 00005000 fd:01 140212 /usr/lib64/libusbredirparser.so.0.0.0 7f9a80b2e000-7f9a80b2f000 r--p 00004000 fd:01 140212 /usr/lib64/libusbredirparser.so.0.0.0 7f9a80b2f000-7f9a80b30000 rw-p 00005000 fd:01 140212 /usr/lib64/libusbredirparser.so.0.0.0 7f9a80b30000-7f9a80c4d000 r-xp 00000000 fd:01 159255 /usr/lib64/libglib-2.0.so.0.3303.0 7f9a80c4d000-7f9a80e4d000 ---p 0011d000 fd:01 159255 /usr/lib64/libglib-2.0.so.0.3303.0 7f9a80e4d000-7f9a80e4e000 r--p 0011d000 fd:01 159255 /usr/lib64/libglib-2.0.so.0.3303.0 7f9a80e4e000-7f9a80e4f000 rw-p 0011e000 fd:01 159255 /usr/lib64/libglib-2.0.so.0.3303.0 7f9a80e4f000-7f9a80e50000 rw-p 00000000 00:00 0 7f9a80e50000-7f9a80e51000 r-xp 00000000 fd:01 159269 /usr/lib64/libgthread-2.0.so.0.3303.0 7f9a80e51000-7f9a81050000 ---p 00001000 fd:01 159269 /usr/lib64/libgthread-2.0.so.0.3303.0 7f9a81050000-7f9a81051000 r--p 00000000 fd:01 159269 /usr/lib64/libgthread-2.0.so.0.3303.0 7f9a81051000-7f9a81052000 rw-p 00001000 fd:01 159269 /usr/lib64/libgthread-2.0.so.0.3303.0 7f9a81052000-7f9a81059000 r-xp 00000000 fd:01 159254 /usr/lib64/librt-2.15.90.so 7f9a81059000-7f9a81258000 ---p 00007000 fd:01 159254 /usr/lib64/librt-2.15.90.so 7f9a81258000-7f9a81259000 r--p 00006000 fd:01 159254 /usr/lib64/librt-2.15.90.so 7f9a81259000-7f9a8125a000 rw-p 00007000 fd:01 159254 /usr/lib64/librt-2.15.90.so 7f9a8125a000-7f9a8125d000 r-xp 00000000 fd:01 138879 /usr/lib64/libdl-2.15.90.so 7f9a8125d000-7f9a8145c000 ---p 00003000 fd:01 138879 /usr/lib64/libdl-2.15.90.so 7f9a8145c000-7f9a8145d000 r--p 00002000 fd:01 138879 /usr/lib64/libdl-2.15.90.so 7f9a8145d000-7f9a8145e000 rw-p 00003000 fd:01 138879 /usr/lib64/libdl-2.15.90.so 7f9a8145e000-7f9a81475000 r-xp 00000000 fd:01 159253 /usr/lib64/libpthread-2.15.90.so 7f9a81475000-7f9a81674000 ---p 00017000 fd:01 159253 /usr/lib64/libpthread-2.15.90.so 7f9a81674000-7f9a81675000 r--p 00016000 fd:01 159253 /usr/lib64/libpthread-2.15.90.so 7f9a81675000-7f9a81676000 rw-p 00017000 fd:01 159253 /usr/lib64/libpthread-2.15.90.so 7f9a81676000-7f9a8167a000 rw-p 00000000 00:00 0 7f9a8167a000-7f9a816b3000 r-xp 00000000 fd:01 162538 /usr/lib64/libnspr4.so 7f9a816b3000-7f9a818b2000 ---p 00039000 fd:01 162538 /usr/lib64/libnspr4.so 7f9a818b2000-7f9a818b3000 r--p 00038000 fd:01 162538 /usr/lib64/libnspr4.so 7f9a818b3000-7f9a818b5000 rw-p 00039000 fd:01 162538 /usr/lib64/libnspr4.so 7f9a818b5000-7f9a818b7000 rw-p 00000000 00:00 0 7f9a818b7000-7f9a818bb000 r-xp 00000000 fd:01 162546 /usr/lib64/libplc4.so 7f9a818bb000-7f9a81aba000 ---p 00004000 fd:01 162546 /usr/lib64/libplc4.so 7f9a81aba000-7f9a81abb000 r--p 00003000 fd:01 162546 /usr/lib64/libplc4.so 7f9a81abb000-7f9a81abc000 rw-p 00004000 fd:01 162546 /usr/lib64/libplc4.so 7f9a81abc000-7f9a81abf000 r-xp 00000000 fd:01 162549 /usr/lib64/libplds4.so 7f9a81abf000-7f9a81cbe000 ---p 00003000 fd:01 162549 /usr/lib64/libplds4.so 7f9a81cbe000-7f9a81cbf000 r--p 00002000 fd:01 162549 /usr/lib64/libplds4.so 7f9a81cbf000-7f9a81cc0000 rw-p 00003000 fd:01 162549 /usr/lib64/libplds4.so 7f9a81cc0000-7f9a81ce0000 r-xp 00000000 fd:01 162551 /usr/lib64/libnssutil3.so 7f9a81ce0000-7f9a81edf000 ---p 00020000 fd:01 162551 /usr/lib64/libnssutil3.so 7f9a81edf000-7f9a81ee5000 r--p 0001f000 fd:01 162551 /usr/lib64/libnssutil3.so 7f9a81ee5000-7f9a81ee6000 rw-p 00025000 fd:01 162551 /usr/lib64/libnssutil3.so 7f9a81ee6000-7f9a82017000 r-xp 00000000 fd:01 162586 /usr/lib64/libnss3.so 7f9a82017000-7f9a82217000 ---p 00131000 fd:01 162586 /usr/lib64/libnss3.so 7f9a82217000-7f9a8221c000 r--p 00131000 fd:01 162586 /usr/lib64/libnss3.so 7f9a8221c000-7f9a8221e000 rw-p 00136000 fd:01 162586 /usr/lib64/libnss3.so 7f9a8221e000-7f9a82220000 rw-p 00000000 00:00 0 7f9a82220000-7f9a82248000 r-xp 00000000 fd:01 162605 /usr/lib64/libsmime3.so 7f9a82248000-7f9a82448000 ---p 00028000 fd:01 162605 /usr/lib64/libsmime3.so 7f9a82448000-7f9a8244b000 r--p 00028000 fd:01 162605 /usr/lib64/libsmime3.so 7f9a8244b000-7f9a8244c000 rw-p 0002b000 fd:01 162605 /usr/lib64/libsmime3.so 7f9a8244c000-7f9a82484000 r-xp 00000000 fd:01 162587 /usr/lib64/libssl3.so 7f9a82484000-7f9a82684000 ---p 00038000 fd:01 162587 /usr/lib64/libssl3.so 7f9a82684000-7f9a82686000 r--p 00038000 fd:01 162587 /usr/lib64/libssl3.so 7f9a82686000-7f9a82687000 rw-p 0003a000 fd:01 162587 /usr/lib64/libssl3.so 7f9a82687000-7f9a82688000 rw-p 00000000 00:00 0 7f9a82688000-7f9a826ab000 r-xp 00000000 fd:01 159249 /usr/lib64/ld-2.15.90.so 7f9a82745000-7f9a82893000 rw-p 00000000 00:00 0 7f9a828a0000-7f9a828a1000 rw-p 00000000 00:00 0 7f9a828a1000-7f9a828a4000 rw-s 00000000 00:09 5512 anon_inode:kvm-vcpu 7f9a828a4000-7f9a828a5000 rw-s 00000000 00:04 25833247 /dev/zero (deleted) 7f9a828a5000-7f9a828a6000 rw-s 00000000 00:04 25842785 /dev/zero (deleted) 7f9a828a6000-7f9a828a9000 rw-s 00000000 00:04 25841260 /dev/zero (deleted) 7f9a828a9000-7f9a828aa000 rw-p 00000000 00:00 0 7f9a828aa000-7f9a828ab000 r--p 00022000 fd:01 159249 /usr/lib64/ld-2.15.90.so 7f9a828ab000-7f9a828ac000 rw-p 00023000 fd:01 159249 /usr/lib64/ld-2.15.90.so 7f9a828ac000-7f9a828ad000 rw-p 00000000 00:00 0 7f9a828ad000-7f9a82bf9000 r-xp 00000000 fd:01 166240 /usr/bin/qemu-kvm 7f9a82df8000-7f9a82ec6000 r--p 0034b000 fd:01 166240 /usr/bin/qemu-kvm 7f9a82ec6000-7f9a82ef8000 rw-p 00419000 fd:01 166240 /usr/bin/qemu-kvm 7f9a82ef8000-7f9a83707000 rw-p 00000000 00:00 0 7f9a852d9000-7f9a859d8000 rw-p 00000000 00:00 0 [heap] 7f9a859d8000-7f9a859f8000 rw-p 00000000 00:00 0 [heap] 7f9a859f8000-7f9a85a38000 rw-p 00000000 00:00 0 [heap] 7f9a85a38000-7f9a85a58000 rw-p 00000000 00:00 0 [heap] 7f9a85a58000-7f9a85d63000 rw-p 00000000 00:00 0 [heap] 7ffff02d8000-7ffff02f9000 rw-p 00000000 00:00 0 [stack] 7ffff03ff000-7ffff0400000 r-xp 00000000 00:00 0 [vdso] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall] Version-Release number of selected component (if applicable): qemu-system-x86-1.0-17.fc18.x86_64 How reproducible: Rare. Steps to Reproduce: 1. Unknown.
Happened again with a slightly different stack trace: *** glibc detected *** /bin/qemu-kvm: corrupted double-linked list: 0x00007fb6ac933c00 *** ======= Backtrace: ========= /lib64/libc.so.6(+0x30e127d6ad)[0x7fb6a4ddb6ad] /lib64/libc.so.6(+0x30e127e078)[0x7fb6a4ddc078] /bin/qemu-kvm(+0x98a95)[0x7fb6aa65fa95] /bin/qemu-kvm(+0x9e2ba)[0x7fb6aa6652ba] /bin/qemu-kvm(+0x8d568)[0x7fb6aa654568] /bin/qemu-kvm(+0x8d630)[0x7fb6aa654630] /bin/qemu-kvm(main+0x1429)[0x7fb6aa63c9b9] /lib64/libc.so.6(__libc_start_main+0xf5)[0x7fb6a4d7fba5] /bin/qemu-kvm(+0x79299)[0x7fb6aa640299] ======= Memory map: ========
Please decode those addresses using addr2line or gdb.
I was trying all morning to capture a core file, and now I finally reproduced the bug and got one: Program terminated with signal 6, Aborted. #0 0x00007fe8cd51bc85 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:63 63 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig); (gdb) bt #0 0x00007fe8cd51bc85 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:63 #1 0x00007fe8cd51d438 in __GI_abort () at abort.c:90 #2 0x00007fe8cd55b92b in __libc_message (do_abort=2, fmt=fmt@entry= 0x7fe8cd662fd0 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:197 #3 0x00007fe8cd5626ad in malloc_printerr (ptr=0x7fe8d5b04a80, str= 0x7fe8cd65fee7 "corrupted double-linked list", action=<optimized out>) at malloc.c:4969 #4 malloc_consolidate (av=av@entry=0x7fe8cd89d720) at malloc.c:4143 #5 0x00007fe8cd563078 in _int_free (av=0x7fe8cd89d720, p=0x7fe8d53d09f0, have_lock=0) at malloc.c:4043 #6 0x00007fe8d2de6a95 in qcow2_cache_destroy (bs=bs@entry=0x7fe8d53cea90, c= 0x7fe8d53d0790) at block/qcow2-cache.c:70 #7 0x00007fe8d2dec2ba in qcow2_close (bs=0x7fe8d53cea90) at block/qcow2.c:628 #8 0x00007fe8d2ddb568 in bdrv_close (bs=0x7fe8d53cea90) at block.c:709 #9 0x00007fe8d2ddb630 in bdrv_close_all () at block.c:732 #10 0x00007fe8d2dc39b9 in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at /usr/src/debug/qemu-kvm-1.0/vl.c:3529
(gdb) info threads Id Target Id Frame 15 Thread 0x7fe8c525c700 (LWP 11782) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 14 Thread 0x7fe8951f7700 (LWP 11791) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 13 Thread 0x7fe8981fd700 (LWP 11785) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 12 Thread 0x7fe8979fc700 (LWP 11786) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 11 Thread 0x7fe8949f6700 (LWP 11792) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 10 Thread 0x7fe8971fb700 (LWP 11787) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 9 Thread 0x7fe8c6942700 (LWP 11780) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 8 Thread 0x7fe8c4a5b700 (LWP 11783) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 7 Thread 0x7fe8969fa700 (LWP 11788) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 6 Thread 0x7fe8961f9700 (LWP 11789) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 5 Thread 0x7fe88ffff700 (LWP 11793) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 4 Thread 0x7fe8989fe700 (LWP 11784) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 3 Thread 0x7fe8959f8700 (LWP 11790) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 2 Thread 0x7fe8c5f40700 (LWP 11781) 0x00007fe8cd5d2aa7 in ioctl () at ../sysdeps/unix/syscall-template.S:81 * 1 Thread 0x7fe8d2d0fa00 (LWP 11777) 0x00007fe8cd51bc85 in __GI_raise ( sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:63
Interestingly, another core dump file shows a slightly different stack trace, although it's all in the same area of the code ... Program terminated with signal 6, Aborted. #0 0x00007fb95005dc85 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:63 63 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig); (gdb) bt #0 0x00007fb95005dc85 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:63 #1 0x00007fb95005f438 in __GI_abort () at abort.c:90 #2 0x00007fb950056a52 in __assert_fail_base (fmt= 0x7fb9501a4468 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7fb955b373af "c->entries[i].ref == 0", file=file@entry=0x7fb955b3739b "block/qcow2-cache.c", line=line@entry=69, function=function@entry=0x7fb955b373e0 "qcow2_cache_destroy") at assert.c:92 #3 0x00007fb950056b02 in __GI___assert_fail (assertion=assertion@entry= 0x7fb955b373af "c->entries[i].ref == 0", file=file@entry= 0x7fb955b3739b "block/qcow2-cache.c", line=line@entry=69, function=function@entry=0x7fb955b373e0 "qcow2_cache_destroy") at assert.c:101 #4 0x00007fb955928ae7 in qcow2_cache_destroy (bs=bs@entry=0x7fb957cf7a90, c= 0x7fb957cf9790) at block/qcow2-cache.c:69 #5 0x00007fb95592e2ba in qcow2_close (bs=0x7fb957cf7a90) at block/qcow2.c:628 #6 0x00007fb95591d568 in bdrv_close (bs=0x7fb957cf7a90) at block.c:709 #7 0x00007fb95591d630 in bdrv_close_all () at block.c:732 #8 0x00007fb9559059b9 in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at /usr/src/debug/qemu-kvm-1.0/vl.c:3529 (gdb) info threads Id Target Id Frame 18 Thread 0x7fb941317700 (LWP 5751) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 17 Thread 0x7fb942319700 (LWP 5749) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 16 Thread 0x7fb942b1a700 (LWP 5748) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 15 Thread 0x7fb94331b700 (LWP 5747) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 14 Thread 0x7fb91a1f9700 (LWP 5758) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 13 Thread 0x7fb9191f7700 (LWP 5760) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 12 Thread 0x7fb9199f8700 (LWP 5759) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 11 Thread 0x7fb91b9fc700 (LWP 5755) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 10 Thread 0x7fb91c1fd700 (LWP 5754) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 9 Thread 0x7fb940b16700 (LWP 5752) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 8 Thread 0x7fb949484700 (LWP 5744) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 7 Thread 0x7fb91b1fb700 (LWP 5756) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 6 Thread 0x7fb91a9fa700 (LWP 5757) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 5 Thread 0x7fb943b1c700 (LWP 5746) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 4 Thread 0x7fb948a82700 (LWP 5745) 0x00007fb950114aa7 in ioctl () at ../sysdeps/unix/syscall-template.S:81 3 Thread 0x7fb941b18700 (LWP 5750) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 2 Thread 0x7fb91c9fe700 (LWP 5753) pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217 * 1 Thread 0x7fb955851a00 (LWP 5741) 0x00007fb95005dc85 in __GI_raise ( sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:63
The assertion in comment 5 is in this code: int qcow2_cache_destroy(BlockDriverState* bs, Qcow2Cache *c) { int i; for (i = 0; i < c->size; i++) { assert(c->entries[i].ref == 0); qemu_vfree(c->entries[i].table); } g_free(c->entries); g_free(c); return 0; } I don't have a value for 'i' but two of the 'entries' have non-zero 'ref': (gdb) print *c $3 = { entries = 0x7f22fd8c07b0, depends = 0x0, size = 16, depends_on_flush = false, writethrough = false } (gdb) print c->entries[0] $4 = { table = 0x7f22fd8c0a00, offset = 262144, dirty = false, cache_hits = 2964, ref = 1 } [...] (gdb) print c->entries[2] $6 = { table = 0x7f22fd8e0e00, offset = 351469568, dirty = false, cache_hits = 33, ref = 1 } The vcpu is still running, so it's unclear why qemu things its safe to start destroying the qcow2 cache.
I don't know if this is definitively the problem, but these two lines in vl.c look the wrong way round to me: main_loop(); bdrv_close_all(); << pause_all_vcpus(); << net_cleanup(); res_free();
Possible duplicates: bug 798499 bug 798857 bug 805893 I am now able to reproduce this bug almost at will: $ cd /tmp $ ulimit -Hc unlimited $ ulimit -Sc unlimited $ rm -f test.img $ qemu-img create -f qcow2 test.img 100M $ guestfish -a test.img run : part-disk /dev/sda gpt : copy-device-to-device /dev/zero /dev/sda1 size:98M $ ls core.23671 test.img The core file isn't produced every time, but it's produced pretty often, maybe 1 in 3 runs. Simply repeat the qemu-img + guestfish commands until it happens. To get full debug information about what libguestfs is doing add the -v and/or -x options to guestfish. But basically it appears to happen when we send SIGTERM to qemu.
Workaround posted for virt-resize: https://www.redhat.com/archives/libguestfs/2012-July/msg00015.html
The underlying issue is fixed in qemu-kvm >= 1.1.0 which is being rolled out to Fedora Rawhide today. The workaround mentioned in comment 9 is not required, and will not go upstream. The solution is to update qemu to >= 1.1.0.
*** Bug 837021 has been marked as a duplicate of this bug. ***
Reopening and moving this bug to F17. If this is a possible data loss issue, we should try and isolate something to backport (rebasing to 1.1 should be a last resort option IMO)
This should be the fix: commit 7094f12f868fc1b75b105bcc676e15964dab77af Author: Kevin Wolf <kwolf> Date: Wed Apr 11 11:06:37 2012 +0200 block: Drain requests in bdrv_close
Hmm, that wasn't trivial to backport, particularly because some of the plumbing needed for bdrv_drain_all also needs to be backported, and anything non-trivial in this area scares me. Since F17 isn't long for this world, and we haven't seen reports from endusers, just closing this wontfix.