[Qemu-devel] [Bug 1429034] [NEW] qemu abort in qemu_coroutine_enter when multi-thread writing

[halsey]

Public bug reported:

qemu release version: 2.2.0
platform: x86_64

qemu would be aborted when there are two threads to write two seperate
qcow2 files.

call stack:

#0 0x7ffff5e18989       __GI_raise(address@hidden) 
(../nptl/sysdeps/unix/sysv/linux/raise.c:56)
#1 0x7ffff5e1a098       __GI_abort() (abort.c:90)
#2 0x7ffff728c034       qemu_coroutine_enter(co=0x7fffe0004800, opaque=0x0) 
(qemu-coroutine.c:117)
#3 0x7ffff727df39       bdrv_co_io_em_complete(opaque=0x7ffff7fd6ae0, ret=0) 
(block.c:4847)
#4 0x7ffff7270314       thread_pool_completion_bh(opaque=0x7fffe0006ad0) 
(thread-pool.c:187)
#5 0x7ffff726f873       aio_bh_poll(ctx=0x7fffe0001d00) (async.c:82)
#6 0x7ffff728340b       aio_dispatch(ctx=0x7fffe0001d00) (aio-posix.c:137)
#7 0x7ffff72837b0       aio_poll(ctx=0x7fffe0001d00, blocking=true) 
(aio-posix.c:248)
#8 ??   0x00007ffff72795a8 in bdrv_prwv_co (bs=0x7fffdc0021c0, 
offset=12071639552, qiov=0x7fffe67fa590, is_write=true, flags=(unknown: 0)) 
(block.c:2703)
#9 ??   0x00007ffff727966a in bdrv_rw_co (bs=0x7fffdc0021c0, 
sector_num=23577421, buf=0x7fffe4629250 
"\234\b\335Ǽ\254\213q\301\366\315=\005oI\301\245=\373\004+2?H\212\025\035+\262\274C;X\301FaP\324\335\061ҝ&Y\316=\347\335\020\365\003goɿ\214\312S=\v2]\373\363C\311\341\334\r5k\346k\204\332\023\264\315陌\230\203J\222u\214\066",
 nb_sectors=128, is_write=true, flags=(unknown: 0)) (block.c:2726)
#10 0x7ffff7279758      bdrv_write(bs=0x7fffdc0021c0, sector_num=23577421, 
buf=0x7fffe4629250 
"\234\b\335Ǽ\254\213q\301\366\315=\005oI\301\245=\373\004+2?H\212\025\035+\262\274C;X\301FaP\324\335\061ҝ&Y\316=\347\335\020\365\003goɿ\214\312S=\v2]\373\363C\311\341\334\r5k\346k\204\332\023\264\315陌\230\203J\222u\214\066",
 nb_sectors=128) (block.c:2760)

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: qcow2

** Tags added: qcow2

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https://bugs.launchpad.net/bugs/1429034

Title:
  qemu abort in qemu_coroutine_enter when multi-thread writing

Status in QEMU:
  New

Bug description:
  qemu release version: 2.2.0
  platform: x86_64

  qemu would be aborted when there are two threads to write two seperate
  qcow2 files.

  call stack:

  #0 0x7ffff5e18989     __GI_raise(address@hidden) 
(../nptl/sysdeps/unix/sysv/linux/raise.c:56)
  #1 0x7ffff5e1a098     __GI_abort() (abort.c:90)
  #2 0x7ffff728c034     qemu_coroutine_enter(co=0x7fffe0004800, opaque=0x0) 
(qemu-coroutine.c:117)
  #3 0x7ffff727df39     bdrv_co_io_em_complete(opaque=0x7ffff7fd6ae0, ret=0) 
(block.c:4847)
  #4 0x7ffff7270314     thread_pool_completion_bh(opaque=0x7fffe0006ad0) 
(thread-pool.c:187)
  #5 0x7ffff726f873     aio_bh_poll(ctx=0x7fffe0001d00) (async.c:82)
  #6 0x7ffff728340b     aio_dispatch(ctx=0x7fffe0001d00) (aio-posix.c:137)
  #7 0x7ffff72837b0     aio_poll(ctx=0x7fffe0001d00, blocking=true) 
(aio-posix.c:248)
  #8 ?? 0x00007ffff72795a8 in bdrv_prwv_co (bs=0x7fffdc0021c0, 
offset=12071639552, qiov=0x7fffe67fa590, is_write=true, flags=(unknown: 0)) 
(block.c:2703)
  #9 ?? 0x00007ffff727966a in bdrv_rw_co (bs=0x7fffdc0021c0, 
sector_num=23577421, buf=0x7fffe4629250 
"\234\b\335Ǽ\254\213q\301\366\315=\005oI\301\245=\373\004+2?H\212\025\035+\262\274C;X\301FaP\324\335\061ҝ&Y\316=\347\335\020\365\003goɿ\214\312S=\v2]\373\363C\311\341\334\r5k\346k\204\332\023\264\315陌\230\203J\222u\214\066",
 nb_sectors=128, is_write=true, flags=(unknown: 0)) (block.c:2726)
  #10 0x7ffff7279758    bdrv_write(bs=0x7fffdc0021c0, sector_num=23577421, 
buf=0x7fffe4629250 
"\234\b\335Ǽ\254\213q\301\366\315=\005oI\301\245=\373\004+2?H\212\025\035+\262\274C;X\301FaP\324\335\061ҝ&Y\316=\347\335\020\365\003goɿ\214\312S=\v2]\373\363C\311\341\334\r5k\346k\204\332\023\264\315陌\230\203J\222u\214\066",
 nb_sectors=128) (block.c:2760)

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