[Qemu-devel] [Bug 906804] Re: SIGSEGV using sheepdog

[Kazutaka Morita]

I think this is fixed with http://patchwork.ozlabs.org/patch/138719/

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https://bugs.launchpad.net/bugs/906804

Title:
  SIGSEGV using sheepdog

Status in QEMU:
  New

Bug description:
  While doing a mkfs on a Sheepdog volume attached inside a VM, qemu-kvm
  segfaults:

  
  Program received signal SIGSEGV, Segmentation fault.
  aio_read_response (opaque=0x0) at 
/build/buildd-qemu-kvm_1.0+dfsg-2-amd64-V1Rh0p/qemu-kvm-1.0+dfsg/block/sheepdog.c:784
  784   
/build/buildd-qemu-kvm_1.0+dfsg-2-amd64-V1Rh0p/qemu-kvm-1.0+dfsg/block/sheepdog.c:
 No such file or directory.
        in 
/build/buildd-qemu-kvm_1.0+dfsg-2-amd64-V1Rh0p/qemu-kvm-1.0+dfsg/block/sheepdog.c
  (gdb) bt
  #0  aio_read_response (opaque=0x0) at 
/build/buildd-qemu-kvm_1.0+dfsg-2-amd64-V1Rh0p/qemu-kvm-1.0+dfsg/block/sheepdog.c:784
  #1  0x00007effed02b7bb in coroutine_trampoline (i0=<optimized out>, 
i1=<optimized out>) at 
/build/buildd-qemu-kvm_1.0+dfsg-2-amd64-V1Rh0p/qemu-kvm-1.0+dfsg/coroutine-ucontext.c:125
  #2  0x00007effe89e4d60 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
  #3  0x00007fff90ed7fd0 in ?? ()
  #4  0x0000000000000000 in ?? ()
  (gdb) bt full
  #0  aio_read_response (opaque=0x0) at 
/build/buildd-qemu-kvm_1.0+dfsg-2-amd64-V1Rh0p/qemu-kvm-1.0+dfsg/block/sheepdog.c:784
          rsp = {proto_ver = 8 '\b', opcode = 8 '\b', flags = 61231, epoch = 
32511, id = 4023393600, data_length = 32511, result = 4022027568, copies = 
32511, pad = {3902624371, 32511, 4022027680, 32511, 4022027680, 32511}}
          s = <optimized out>
          fd = <optimized out>
          aio_req = <optimized out>
          acb = <optimized out>
          idx = 139637703787936
  #1  0x00007effed02b7bb in coroutine_trampoline (i0=<optimized out>, 
i1=<optimized out>) at 
/build/buildd-qemu-kvm_1.0+dfsg-2-amd64-V1Rh0p/qemu-kvm-1.0+dfsg/coroutine-ucontext.c:125
          self = 0x7effefbb45a0
          co = 0x7effefbb45a0
  #2  0x00007effe89e4d60 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
  No symbol table info available.
  #3  0x00007fff90ed7fd0 in ?? ()
  No symbol table info available.
  #4  0x0000000000000000 in ?? ()
  No symbol table info available.
  (gdb)  info threads
    Id   Target Id         Frame 
    12   Thread 0x7eff4d3ea700 (LWP 10461) "kvm" 0x00007effe8d3264b in 
pthread_cond_timedwait@@GLIBC_2.3.2 () from 
/lib/x86_64-linux-gnu/libpthread.so.0
    11   Thread 0x7eff4c3e8700 (LWP 10460) "kvm" 0x00007effe8d3264b in 
pthread_cond_timedwait@@GLIBC_2.3.2 () from 
/lib/x86_64-linux-gnu/libpthread.so.0
    9    Thread 0x7eff49be3700 (LWP 10442) "kvm" 0x00007effe8d3264b in 
pthread_cond_timedwait@@GLIBC_2.3.2 () from 
/lib/x86_64-linux-gnu/libpthread.so.0
    8    Thread 0x7eff4a3e4700 (LWP 10441) "kvm" 0x00007effe8d3264b in 
pthread_cond_timedwait@@GLIBC_2.3.2 () from 
/lib/x86_64-linux-gnu/libpthread.so.0
    7    Thread 0x7eff493e2700 (LWP 10440) "kvm" 0x00007effe8d3264b in 
pthread_cond_timedwait@@GLIBC_2.3.2 () from 
/lib/x86_64-linux-gnu/libpthread.so.0
    6    Thread 0x7effd2741700 (LWP 10270) "kvm" 0x00007effe8a71407 in ioctl () 
from /lib/x86_64-linux-gnu/libc.so.6
  * 1    Thread 0x7effecf39900 (LWP 10267) "kvm" aio_read_response (opaque=0x0) 
at 
/build/buildd-qemu-kvm_1.0+dfsg-2-amd64-V1Rh0p/qemu-kvm-1.0+dfsg/block/sheepdog.c:784

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