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[Qemu-devel] [Bug 1673130] Re: qemu 2.7.0 receives SIGABRT in qemu_corou
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From: |
Mohammed Gamal |
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Subject: |
[Qemu-devel] [Bug 1673130] Re: qemu 2.7.0 receives SIGABRT in qemu_coroutine_enter() |
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Date: |
Wed, 15 Mar 2017 16:05:25 -0000 |
Another stack trace:
--------------------------------------------------------------------------
(gdb) bt
#0 0x00007f2f34690067 in __GI_raise (address@hidden) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007f2f34691448 in __GI_abort () at abort.c:89
#2 0x00005629b8260b6c in qemu_coroutine_enter (co=0x7f2cd6a00940) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:113
#3 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cd6a00880) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#4 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cd6a00880) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#5 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cee202b00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#6 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cee202b00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#7 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cee2141d0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#8 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cee2141d0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#9 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cf300b370) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#10 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cf300b370) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#11 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cf1a03560) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#12 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cf1a03560) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#13 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cf3e15ba0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#14 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cf3e15ba0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#15 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2ce80087f0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#16 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2ce80087f0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#17 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cee20d9c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#18 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cee20d9c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#19 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2ceff04850) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#20 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2ceff04850) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#21 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cf21061c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#22 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cf21061c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#23 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cf2105c00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#24 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cf2105c00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#25 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cf3e1d590) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#26 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cf3e1d590) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#27 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cf3e16a00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#28 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cf3e16a00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#29 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2ce8004da0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#30 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2ce8004da0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#31 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cf3e15dc0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#32 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cf3e15dc0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#33 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2ccff00420) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#34 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2ccff00420) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#35 0x00005629b8260e74 in qemu_co_queue_run_restart (co=0x7f2cf1e04900) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#36 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cf1e04900) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#37 0x00005629b8260fa0 in qemu_co_enter_next (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:106
#38 0x00005629b81ff060 in timer_cb (blk=0x5629ba5e3590, is_write=<optimized
out>) at /build/pb-qemu-pssKUp/pb-qemu-2.7.0/block/throttle-groups.c:400
#39 0x00005629b81bc615 in timerlist_run_timers (timer_list=0x5629ba64fd40) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/qemu-timer.c:528
#40 0x00005629b81bc679 in timerlistgroup_run_timers (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/qemu-timer.c:564
#41 0x00005629b81bcf47 in aio_dispatch (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/aio-posix.c:357
#42 0x00005629b81bd0e8 in aio_poll (ctx=0x5629bb9cd610, blocking=<optimized
out>) at /build/pb-qemu-pssKUp/pb-qemu-2.7.0/aio-posix.c:479
#43 0x00005629b801ec79 in iothread_run (opaque=0x5629bb9cd3c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/iothread.c:46
#44 0x00007f2f34a0e0a4 in start_thread (arg=0x7f2f12fff700) at
pthread_create.c:403
#45 0x00007f2f3474362d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
--------------------------------------------------------------------------
Looking at the data:
--------------------------------------------------------------------------
(gdb) frame 2
#2 0x00005629b8260b6c in qemu_coroutine_enter (co=0x7f2cd6a00940) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:113
113 /build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c: No such file
or directory.
(gdb) print *co
$1 = {entry = 0x7f2efbfbc4d8, entry_arg = 0x1, caller = 0x7f2efbfbc4b8,
pool_next = {sle_next = 0x10}, co_queue_wakeup = {sqh_first = 0x7f2d217e2000,
sqh_last = 0x1000}, co_queue_next = {sqe_next = 0x0}}
(gdb) print *co->caller
$2 = {entry = 0x1, entry_arg = 0xc21a480, caller = 0x0, pool_next = {sle_next =
0x0}, co_queue_wakeup = {sqh_first = 0x0, sqh_last = 0xffffea0000567882},
co_queue_next = {sqe_next = 0x100000000000}}
(gdb) frame 4
#4 0x00005629b82609a9 in qemu_coroutine_enter (co=0x7f2cd6a00880) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
119 in /build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c
(gdb) print *co
$3 = {entry = 0x200000046, entry_arg = 0x7f2c00000001, caller = 0x7f2cd6a00928,
pool_next = {sle_next = 0x7f2cd6a00930}, co_queue_wakeup = {sqh_first = 0x0,
sqh_last = 0x7f2cd6a008a0}, co_queue_next = {
sqe_next = 0xc21a480}}
(gdb) print *co->caller
$4 = {entry = 0x2301bc4d8, entry_arg = 0x2301bc4b8, caller = 0x159e2000,
pool_next = {sle_next = 0x7f2efbfbc4d8}, co_queue_wakeup = {sqh_first = 0x1,
sqh_last = 0x7f2efbfbc4b8}, co_queue_next = {
sqe_next = 0x10}}
--------------------------------------------------------------------------
Same as above. If co->caller is not NULL in earlier calls, why have they
succeeded?
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https://bugs.launchpad.net/bugs/1673130
Title:
qemu 2.7.0 receives SIGABRT in qemu_coroutine_enter()
Status in QEMU:
New
Bug description:
I've been experiencing frequent SIGABRTs (in addition to segfaults in
#1671876) lately with qemu 2.7.0 running Ubuntu 16.04 guests. The
crash usually happens in qemu_coroutine_enter(). I haven't seen this
so far with any other guests or distros.
Here is one stack trace I obtained
--------------------------------------------------------------------------
(gdb) bt
#0 0x00007fd7cc676067 in __GI_raise (address@hidden) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007fd7cc677448 in __GI_abort () at abort.c:89
#2 0x0000556aed247b6c in qemu_coroutine_enter (co=0x7fd574300df0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:113
#3 0x0000556aed247e55 in qemu_co_queue_run_restart (co=0x7fd574300ce0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#4 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd574300ce0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#5 0x0000556aed247e74 in qemu_co_queue_run_restart (co=0x7fd589111670) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#6 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd589111670) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#7 0x0000556aed247e74 in qemu_co_queue_run_restart (co=0x7fd57430dba0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#8 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd57430dba0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#9 0x0000556aed247e74 in qemu_co_queue_run_restart (co=0x7fd589119130) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#10 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd589119130) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#11 0x0000556aed247e74 in qemu_co_queue_run_restart (co=0x7fd589117410) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#12 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd589117410) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#13 0x0000556aed247e74 in qemu_co_queue_run_restart (co=0x7fd577f00e00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:60
#14 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd577f00e00) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
#15 0x0000556aed247fa0 in qemu_co_enter_next (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine-lock.c:106
#16 0x0000556aed1e6060 in timer_cb (blk=0x556aef34e590, is_write=<optimized
out>) at /build/pb-qemu-pssKUp/pb-qemu-2.7.0/block/throttle-groups.c:400
#17 0x0000556aed1a3615 in timerlist_run_timers (timer_list=0x556aef3bad40) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/qemu-timer.c:528
#18 0x0000556aed1a3679 in timerlistgroup_run_timers (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/qemu-timer.c:564
#19 0x0000556aed1a3f47 in aio_dispatch (address@hidden) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/aio-posix.c:357
#20 0x0000556aed1a40e8 in aio_poll (ctx=0x556af0738610, blocking=<optimized
out>) at /build/pb-qemu-pssKUp/pb-qemu-2.7.0/aio-posix.c:479
#21 0x0000556aed005c79 in iothread_run (opaque=0x556af07383c0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/iothread.c:46
#22 0x00007fd7cc9f40a4 in start_thread (arg=0x7fd7aafff700) at
pthread_create.c:403
#23 0x00007fd7cc72962d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
--------------------------------------------------------------------------
The code crashes here
--------------------------------------------------------------------------
void qemu_coroutine_enter(Coroutine *co)
{
Coroutine *self = qemu_coroutine_self();
CoroutineAction ret;
trace_qemu_coroutine_enter(self, co, co->entry_arg);
if (co->caller) {
fprintf(stderr, "Co-routine re-entered recursively\n");
abort(); <--- Code aborts here
}
[...]
}
--------------------------------------------------------------------------
Debugging further we see:
--------------------------------------------------------------------------
(gdb) frame 2
#2 0x0000556aed247b6c in qemu_coroutine_enter (co=0x7fd574300df0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:113
113 /build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c: No such
file or directory.
(gdb) print *co
$1 = {entry = 0x7fd793e95a58, entry_arg = 0x1, caller = 0x7fd793e95a38,
pool_next = {sle_next = 0x10}, co_queue_wakeup = {sqh_first = 0x7fd6ebbd2000,
sqh_last = 0x1000}, co_queue_next = {
sqe_next = 0x7fd6ebbd1000}}
(gdb) print *co->caller
$2 = {entry = 0x400400000001, entry_arg = 0xc546a20, caller = 0x0, pool_next
= {sle_next = 0x0}, co_queue_wakeup = {sqh_first = 0x0, sqh_last =
0xffffea00061f7480}, co_queue_next = {sqe_next = 0x100000000000}}
(gdb) frame 4
#4 0x0000556aed2479a9 in qemu_coroutine_enter (co=0x7fd574300ce0) at
/build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c:119
119 in /build/pb-qemu-pssKUp/pb-qemu-2.7.0/util/qemu-coroutine.c
(gdb) print *co
$3 = {entry = 0xc00000053, entry_arg = 0x7fd500000001, caller =
0x7fd574300d88, pool_next = {sle_next = 0x7fd574300d90}, co_queue_wakeup =
{sqh_first = 0x7fd6ebbd1000, sqh_last = 0x7fd574300e00},
co_queue_next = {sqe_next = 0xc546a20}}
(gdb) print *co->caller
$4 = {entry = 0x230095a58, entry_arg = 0x230095a38, caller = 0x187dd2000,
pool_next = {sle_next = 0x187dd1000}, co_queue_wakeup = {sqh_first =
0x187dd0000, sqh_last = 0x187dcf000}, co_queue_next = {
sqe_next = 0x184970000}}
--------------------------------------------------------------------------
The question is, why did qemu_coroutine_enter not complain when in
earlier calls co->caller was not NULL?
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