[root@tesla images]# gdb /var/tmp/abrt/ccpp-2015-01-30-00\:01\:05-3145/coredump GNU gdb (GDB) Fedora 7.8.2-38.fc21 Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-redhat-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... [New LWP 3145] [New LWP 3146] [New LWP 3147] warning: core file may not match specified executable file. Reading symbols from /usr/bin/qemu-system-x86_64...Reading symbols from /usr/lib/debug/usr/bin/qemu-system-x86_64.debug...done. done. Missing separate debuginfo for Try: yum --enablerepo='*debug*' install /usr/lib/debug/.build-id/38/76a95520be4a9a158032e53217f000bd06c33b Missing separate debuginfo for /lib64/ld-linux-x86-64.so.2 Try: yum --enablerepo='*debug*' install /usr/lib/debug/.build-id/f9/70b505f86b19aaa0697d2216cbb9c8812f3589 [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Core was generated by `/usr/bin/qemu-system-x86_64 -nographic -nodefconfig -nodefaults -m 2048 -device'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x00007f84bbbf5159 in aio_set_fd_handler (ctx=ctx@entry=0x0, fd=8, io_read=io_read@entry=0x7f84bbc28470 , io_write=io_write@entry=0x7f84bbc27d80 , opaque=opaque@entry=0x7f84bcca85e0) at aio-posix.c:50 50 { Missing separate debuginfos, use: debuginfo-install SDL2-2.0.3-4.fc21.x86_64 alsa-lib-1.0.28-2.fc21.x86_64 at-spi2-atk-2.14.1-1.fc21.x86_64 at-spi2-core-2.14.1-1.fc21.x86_64 atk-2.14.0-1.fc21.x86_64 bluez-libs-5.23-1.fc21.x86_64 boost-system-1.55.0-8.fc21.x86_64 boost-thread-1.55.0-8.fc21.x86_64 brlapi-0.6.3-1.fc21.x86_64 bzip2-libs-1.0.6-14.fc21.x86_64 cairo-1.13.1-0.4.git337ab1f.fc21.x86_64 cairo-gobject-1.13.1-0.4.git337ab1f.fc21.x86_64 celt051-0.5.1.3-9.fc21.x86_64 cyrus-sasl-lib-2.1.26-19.fc21.x86_64 dbus-libs-1.8.14-1.fc21.x86_64 elfutils-libelf-0.161-2.fc21.x86_64 elfutils-libs-0.161-2.fc21.x86_64 expat-2.1.0-10.fc21.x86_64 flac-libs-1.3.1-1.fc21.x86_64 fontconfig-2.11.1-5.fc21.x86_64 freetype-2.5.3-13.fc21.x86_64 gdk-pixbuf2-2.31.1-1.fc21.x86_64 glib2-2.42.1-1.fc21.x86_64 glusterfs-api-3.5.3-1.fc21.x86_64 glusterfs-libs-3.5.3-1.fc21.x86_64 gmp-6.0.0-7.fc21.x86_64 gnutls-3.3.12-1.fc21.x86_64 graphite2-1.2.4-3.fc21.x86_64 gsm-1.0.13-12.fc21.x86_64 gtk3-3.14.6-1.fc21.x86_64 harfbuzz-0.9.36-1.fc21.x86_64 json-c-0.12-5.fc21.x86_64 keyutils-libs-1.5.9-4.fc21.x86_64 libICE-1.0.9-2.fc21.x86_64 libSM-1.2.2-2.fc21.x86_64 libX11-1.6.2-2.fc21.x86_64 libXau-1.0.8-4.fc21.x86_64 libXcomposite-0.4.4-6.fc21.x86_64 libXcursor-1.1.14-4.fc21.x86_64 libXdamage-1.1.4-6.fc21.x86_64 libXext-1.3.3-2.fc21.x86_64 libXfixes-5.0.1-4.fc21.x86_64 libXi-1.7.4-2.fc21.x86_64 libXinerama-1.1.3-4.fc21.x86_64 libXrandr-1.4.2-2.fc21.x86_64 libXrender-0.9.8-4.fc21.x86_64 libXtst-1.2.2-4.fc21.x86_64 libXxf86vm-1.1.3-4.fc21.x86_64 libaio-0.3.110-4.fc21.x86_64 libasyncns-0.8-8.fc21.x86_64 libatomic_ops-7.4.2-4.fc21.x86_64 libattr-2.4.47-9.fc21.x86_64 libcap-2.24-7.fc21.x86_64 libcurl-7.37.0-12.fc21.x86_64 libdrm-2.4.58-3.fc21.x86_64 libfdt-1.4.0-5.fc21.x86_64 libffi-3.1-6.fc21.x86_64 libgcc-4.9.2-1.fc21.x86_64 libgcrypt-1.6.1-7.fc21.x86_64 libgpg-error-1.13-3.fc21.x86_64 libibverbs-1.1.8-3.fc21.x86_64 libidn-1.28-5.fc21.x86_64 libiscsi-1.11.0-2.fc21.x86_64 libjpeg-turbo-1.3.1-4.fc21.x86_64 libnl3-3.2.25-5.fc21.x86_64 libogg-1.3.0-8.fc21.x86_64 libpng-1.6.10-3.fc21.x86_64 librados2-0.80.7-3.fc21.x86_64 librbd1-0.80.7-3.fc21.x86_64 librdmacm-1.0.18.1-3.fc21.x86_64 libseccomp-2.1.1-5.fc21.x86_64 libselinux-2.3-5.fc21.x86_64 libsndfile-1.0.25-14.fc21.x86_64 libssh2-1.4.3-16.fc21.x86_64 libstdc++-4.9.2-1.fc21.x86_64 libtasn1-4.2-1.fc21.x86_64 libusbx-1.0.19-2.fc21.x86_64 libuuid-2.25.2-2.fc21.x86_64 libvorbis-1.3.4-3.fc21.x86_64 libwayland-client-1.6.0-1.fc21.x86_64 libwayland-cursor-1.6.0-1.fc21.x86_64 libwayland-server-1.6.0-1.fc21.x86_64 libxcb-1.11-3.fc21.x86_64 libxkbcommon-0.5.0-1.fc21.x86_64 libxshmfence-1.2-1.fc21.x86_64 mesa-libEGL-10.4.1-1.20141230.fc21.x86_64 mesa-libGL-10.4.1-1.20141230.fc21.x86_64 mesa-libgbm-10.4.1-1.20141230.fc21.x86_64 mesa-libglapi-10.4.1-1.20141230.fc21.x86_64 ncurses-libs-5.9-16.20140323.fc21.x86_64 nettle-2.7.1-5.fc21.x86_64 nspr-4.10.7-1.fc21.x86_64 nss-3.17.3-2.fc21.x86_64 nss-softokn-freebl-3.17.3-1.fc21.x86_64 nss-util-3.17.3-1.fc21.x86_64 numactl-libs-2.0.9-4.fc21.x86_64 openldap-2.4.40-2.fc21.x86_64 openssl-libs-1.0.1k-1.fc21.x86_64 opus-1.1-5.fc21.x86_64 p11-kit-0.22.1-1.fc21.x86_64 pango-1.36.8-1.fc21.x86_64 pcre-8.35-8.fc21.x86_64 pixman-0.32.6-4.fc21.x86_64 pulseaudio-libs-5.0-25.fc21.x86_64 python-libs-2.7.8-7.fc21.x86_64 spice-server-0.12.5-5.fc21.x86_64 systemd-libs-216-16.fc21.x86_64 tcp_wrappers-libs-7.6-79.fc21.x86_64 trousers-0.3.13-3.fc21.x86_64 usbredir-0.7-3.fc21.x86_64 vte3-0.36.3-3.fc21.x86_64 xen-libs-4.4.1-12.fc21.x86_64 xz-libs-5.1.2-14alpha.fc21.x86_64 zlib-1.2.8-7.fc21.x86_64 (gdb) bt full #0 0x00007f84bbbf5159 in aio_set_fd_handler (ctx=ctx@entry=0x0, fd=8, io_read=io_read@entry=0x7f84bbc28470 , io_write=io_write@entry=0x7f84bbc27d80 , opaque=opaque@entry=0x7f84bcca85e0) at aio-posix.c:50 node = #1 0x00007f84bbc27cab in nbd_co_send_request (s=s@entry=0x7f84bcca85e0, request=request@entry=0x7f84bb82db40, qiov=qiov@entry=0x0, offset=offset@entry=0) at block/nbd-client.c:112 aio_context = 0x0 rc = ret = #2 0x00007f84bbc27fdb in nbd_co_readv_1 (client=0x7f84bcca85e0, sector_num=, nb_sectors=, qiov=0x7f84bb82dbe0, offset=0) at block/nbd-client.c:210 request = {magic = 0, type = 0, handle = 140208079799776, from = 0, len = 512} reply = ret = #3 0x00007f84bbbed513 in bdrv_aligned_preadv (bs=bs@entry=0x7f84bce0b8d0, req=req@entry=0x7f84bb82dca0, offset=offset@entry=0, bytes=bytes@entry=512, align=align@entry=512, qiov=qiov@entry=0x7f84bb82ddc0, flags=0) at block.c:3081 local_qiov = {iov = 0x7f84bcec5b10, niov = 1, nalloc = 1, size = 512} local_sectors = len = total_sectors = 83886080 max_nb_sectors = drv = 0x7f84bc0ad300 ret = sector_num = 0 nb_sectors = 1 __PRETTY_FUNCTION__ = "bdrv_aligned_preadv" #4 0x00007f84bbbed7b9 in bdrv_co_do_preadv (bs=0x7f84bce0b8d0, offset=offset@entry=0, bytes=bytes@entry=512, qiov=0x7f84bb82ddc0, qiov@entry=0x7f84bce0b8d0, flags=flags@entry=(unknown: 0)) at block.c:3162 drv = req = {bs = 0x7f84bce0b8d0, offset = 0, bytes = 512, is_write = false, serialising = false, overlap_offset = 0, overlap_bytes = 512, list = {le_next = 0x0, le_prev = 0x7f84bce0c368}, co = 0x7f84bcca8090, wait_queue = {entries = {tqh_first = 0x0, tqh_last = 0x7f84bb82dce0}}, waiting_for = 0x0} align = 512 head_buf = 0x0 tail_buf = 0x0 local_qiov = {iov = 0x0, niov = -1176775459, nalloc = 32644, size = 1} use_local_qiov = false ret = #5 0x00007f84bbbed908 in bdrv_co_readv (flags=(unknown: 0), qiov=0x7f84bce0b8d0, nb_sectors=1, sector_num=0, bs=) at block.c:3184 #6 0x00007f84bbbed908 in bdrv_co_readv (bs=, sector_num=sector_num@entry=0, nb_sectors=nb_sectors@entry=1, qiov=qiov@entry=0x7f84bb82ddc0) at block.c:3193 #7 0x00007f84bbc0fc6e in qcow2_co_readv (bs=0x7f84bcca05c0, sector_num=0, remaining_sectors=1, qiov=0x7fff24931eb0) at block/qcow2.c:1040 local_qiov = {iov = 0x7f84bcec5760, niov = 1, nalloc = 1, size = 512} s = 0x7f84bcca1100 index_in_cluster = n1 = 1 ret = 0 cur_nr_sectors = 1 cluster_offset = 0 bytes_done = 0 hd_qiov = {iov = 0x7f84bcec5740, niov = 1, nalloc = 1, size = 512} cluster_data = 0x0 ---Type to continue, or q to quit--- __PRETTY_FUNCTION__ = "qcow2_co_readv" __FUNCTION__ = "qcow2_co_readv" #8 0x00007f84bbbed292 in bdrv_aligned_preadv (bs=bs@entry=0x7f84bcca05c0, req=req@entry=0x7f84bb82df20, offset=offset@entry=0, bytes=bytes@entry=512, align=align@entry=512, qiov=qiov@entry=0x7fff24931eb0, flags=0) at block.c:3056 drv = 0x7f84bc0aaec0 ret = sector_num = 0 nb_sectors = 1 __PRETTY_FUNCTION__ = "bdrv_aligned_preadv" #9 0x00007f84bbbed7b9 in bdrv_co_do_preadv (bs=0x7f84bcca05c0, offset=0, bytes=512, qiov=0x7fff24931eb0, flags=(unknown: 0)) at block.c:3162 drv = req = {bs = 0x7f84bcca05c0, offset = 0, bytes = 512, is_write = false, serialising = false, overlap_offset = 0, overlap_bytes = 512, list = {le_next = 0x0, le_prev = 0x7f84bcca1058}, co = 0x7f84bcca8090, wait_queue = {entries = {tqh_first = 0x0, tqh_last = 0x7f84bb82df60}}, waiting_for = 0x0} align = 512 head_buf = 0x0 tail_buf = 0x0 local_qiov = {iov = 0x0, niov = 0, nalloc = 0, size = 0} use_local_qiov = false ret = #10 0x00007f84bbbeeef5 in bdrv_rw_co_entry (opaque=0x7fff24931e60) at block.c:2706 opaque = 0x7fff24931e60 rwco = 0x7fff24931e60 #11 0x00007f84bbbfd91a in coroutine_trampoline (i0=, i1=) at coroutine-ucontext.c:118 self = 0x7f84bcca8090 co = 0x7f84bcca8090 #12 0x00007f84b097eff0 in __start_context () at /usr/lib64/libc-2.20.so #13 0x00007fff24931ad0 in () #14 0x0000000000000000 in () (gdb) quit