[Bug 425923] [NEW] qemu segfaults instantly

[Sam Liddicott]

Public bug reported:

Binary package hint: qemu

$ lsb_release -rd
Description:	Ubuntu karmic (development branch)
Release:	9.10
qemu-kvm version: 0.11.0~rc1-0ubuntu11
$ qemu --version
QEMU PC emulator version 0.10.91 (qemu-kvm-0.11.0-rc1), Copyright (c) 2003-2008 Fabrice Bellard

sam at lazarus:~$ sudo modprobe kqemu
sam at lazarus:~$ sudo qemu /dev/sda
open /dev/kvm: No such file or directory
Could not initialize KVM, will disable KVM support
Segmentation fault (core dumped)

A black window pops up and then goes away with a segfault reported on
the console.

The end of strace is:
clock_gettime(CLOCK_MONOTONIC, {37546, 912898268}) = 0
brk(0x86b6000)                          = 0x86b6000
brk(0x86f2000)                          = 0x86f2000
clock_gettime(CLOCK_MONOTONIC, {37546, 914351127}) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 914423423}) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 914489761}) = 0
timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0
timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 250000}}, NULL) = 0
select(6, [3 5], [], [], {0, 0})        = 1 (in [3], left {0, 0})
read(3, "\0", 512)                      = 1
--- SIGALRM (Alarm clock) @ 0 (0) ---
write(4, "\0", 1)                       = 1
sigreturn()                             = ? (mask now [USR2])
read(3, "\0", 512)                      = 1
read(3, 0xbfab363c, 512)                = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_MONOTONIC, {37546, 915294679}) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 915362487}) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 915425172}) = 0
timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0
timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 250000}}, NULL) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 915633024}) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 915696981}) = 0
poll([{fd=7, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=7, revents=POLLOUT}])
--- SIGALRM (Alarm clock) @ 0 (0) ---
write(4, "\0", 1)                       = 1
sigreturn()                             = ? (mask now [USR2])
writev(7, [{"\22\0\7\0\3\0\340\4'\0\0\0\37\0\0\0\10\1\4\0\4\0\0\0QEMU\22\0\7\0"..., 116}, {NULL, 0}, {"", 0}], 3) = 116
poll([{fd=7, events=POLLIN}], 1, -1)    = 1 ([{fd=7, revents=POLLIN}])
read(7, "\34\277z\0\3\0\340\4'\0\0\0\244\353<\2\0{\23\10\360\374i\t\4\0\0\0\0\0\0@"..., 4096) = 160
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
select(8, [7], NULL, NULL, {0, 0})      = 0 (Timeout)
read(7, 0x85a1190, 4096)                = -1 EAGAIN (Resource temporarily unavailable)
select(8, [7], NULL, NULL, {0, 0})      = 0 (Timeout)
clock_gettime(CLOCK_MONOTONIC, {37546, 918654509}) = 0
select(6, [3 5], [], [], {0, 0})        = 1 (in [3], left {0, 0})
read(3, "\0", 512)                      = 1
read(3, 0xbfab363c, 512)                = -1 EAGAIN (Resource temporarily unavailable)
clock_gettime(CLOCK_MONOTONIC, {37546, 918983058}) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 919051008}) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 919113840}) = 0
timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0
timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 22763000}}, NULL) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 919339625}) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 919400911}) = 0
select(6, [3 5], [], [], {0, 0})        = 0 (Timeout)
clock_gettime(CLOCK_MONOTONIC, {37546, 919575878}) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 919640243}) = 0
clock_gettime(CLOCK_MONOTONIC, {37546, 919704052}) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV (core dumped) +++

** Affects: qemu (Ubuntu)
     Importance: Undecided
         Status: New

-- 
qemu segfaults instantly
https://bugs.launchpad.net/bugs/425923
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