[Bug 1715162] Re: qemu-user crashing when writing core dump

[Thomas Huth]

Looking through old bug tickets... is this still an issue with the
latest version of QEMU? Or could we close this ticket nowadays?

** Changed in: qemu
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1715162

Title:
  qemu-user crashing when writing core dump

Status in QEMU:
  Incomplete

Bug description:
  I've a binary I'm running in qemux86-64 but it is segfaulting.  Whilst
  qemu writes the core dump for that, qemu itself is segfaulting.

  (gdb) bt full
  #0  0x00007efdd962e32e in sigsuspend () from 
/data/poky-tmp/master/build/sysroots-uninative/x86_64-linux/lib/libc.so.6
  No symbol table info available.
  #1  0x0000559176d74da4 in dump_core_and_abort (target_sig=target_sig@entry=11)
      at 
/data/poky-tmp/master/build/work/x86_64-linux/qemu-native/2.10.0-r0/qemu-2.10.0/linux-user/signal.c:598
          cpu = <optimized out>
          env = <optimized out>
          ts = 0x55917a42d160
          core_dumped = <optimized out>
          act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, 
sa_mask = {__val = {18446744067267099647,
                18446744073709551615 <repeats 15 times>}}, sa_flags = 0, 
sa_restorer = 0x559100004010}
  #2  0x0000559176d75a38 in handle_pending_signal 
(cpu_env=cpu_env@entry=0x55917a41c2a0, sig=sig@entry=11,
      k=k@entry=0x55917a42d190)
      at 
/data/poky-tmp/master/build/work/x86_64-linux/qemu-native/2.10.0-r0/qemu-2.10.0/linux-user/signal.c:6596
          handler = <optimized out>
          set = {__val = {4294967297, 4294967297, 94083256460867, 14, 128, 0, 
8, 3, 0, 1, 0, 4243635, 139628765215104,
              94083255852784, 94083309703424, 3351315493}}
          target_old_set = {sig = {0}}
          sa = <optimized out>
          ts = 0x55917a42d160
  #3  0x0000559176d765ac in process_pending_signals (cpu_env=<optimized out>)
      at 
/data/poky-tmp/master/build/work/x86_64-linux/qemu-native/2.10.0-r0/qemu-2.10.0/linux-user/signal.c:6674
          sig = 11
          ts = 0x55917a42d160
          set = {__val = {18446744067267100671, 18446744073709551615 <repeats 
15 times>}}
          blocked_set = <optimized out>
  #4  0x0000559176d5e0d8 in cpu_loop (env=0x55917a41c2a0)
      at 
/data/poky-tmp/master/build/work/x86_64-linux/qemu-native/2.10.0-r0/qemu-2.10.0/linux-user/main.c:369
          trapnr = 14
          pc = <optimized out>
          ret = <optimized out>
          info = {si_signo = 11, si_errno = 0, si_code = 196609, _sifields = 
{_pad = {101897450, 192, -647518572, 32509,
                842, 0, 1993519912, 21905, 2051194736, 21905, 1997320506, 
21905, 2051195440, 21905, 1993546713, 0,
                12767276, 64, 1997233696, 21905, 42, 0, 1997233824, 21905, 
1997320464, 21905, 350755584, -1438022877},
              _kill = {_pid = 101897450, _uid = 192}, _timer = {_timer1 = 
101897450, _timer2 = 192}, _rt = {
                _pid = 101897450, _uid = 192, _sigval = {sival_int = 
-647518572, sival_ptr = 139628739274388}},
              _sigchld = {_pid = 101897450, _uid = 192, _status = -647518572, 
_utime = 842, _stime = 94083252138792},
              _sigfault = {_addr = 824735618282}, _sigpoll = {_band = 
101897450, _fd = 192}}}
  #5  0x0000559176d2a4b8 in main (argc=<optimized out>, argv=<optimized out>, 
envp=<optimized out>)
      at 
/data/poky-tmp/master/build/work/x86_64-linux/qemu-native/2.10.0-r0/qemu-2.10.0/linux-user/main.c:4862
          regs1 = {r15 = 0, r14 = 0, r13 = 0, r12 = 0, rbp = 0, rbx = 0, r11 = 
0, r10 = 0, r9 = 0, r8 = 0, rax = 0,
            rcx = 0, rdx = 0, rsi = 0, rdi = 0, orig_rax = 0, rip = 
274888416832, cs = 0, eflags = 0,
            rsp = 274888401360, ss = 0}
          regs = 0x7ffda5b29fc0
          info1 = {load_bias = 274888413184, load_addr = 274877906944, 
start_code = 274877906944,
            end_code = 274877917360, start_data = 274880015120, end_data = 
274880016400, start_brk = 0,
            brk = 274880016472, start_mmap = 183251939328, start_stack = 
274888401360, stack_limit = 274880024576,
            entry = 274888416832, code_offset = 0, data_offset = 0, saved_auxv 
= 274888402256,
            auxv_len = 18446744073709550728, arg_start = 274888401368, arg_end 
= 274888401408,
            arg_strings = 274888402550, env_strings = 274888402788, file_string 
= 274888413067, elf_flags = 0,
            personality = 0}
          info = 0x7ffda5b2a070
          bprm = {
            buf = 
"\177ELF\002\001\001\000\000\000\000\000\000\000\000\000\003\000>\000\001\000\000\000@\016\000\000\000\000\000\000@\000\000\000\000\000\000\000\230`\002\000\000\000\000\000\000\000\000\000@\000\070\000\006\000@\000\027\000\026\000\001\000\000\000\005",
 '\000' <repeats 27 times>, 
"\264C\002\000\000\000\000\000\264C\002\000\000\000\000\000\000\000 
\000\000\000\000\000\001\000\000\000\006\000\000\000\240G\002\000\000\000\000\000\240G\"\000\000\000\000\000\240G\"\000\000\000\000\000\330\027\000\000\000\000\000\000p\031\000\000\000\000\000\000\000\000
 
\000\000\000\000\000\002\000\000\000\006\000\000\000\030N\002\000\000\000\000\000\030N\"\000\000\000\000\000"...,
 p = 274888401360, fd = 3,
            e_uid = 1000, e_gid = 1000, argc = 5, envc = 104, argv = 
0x55917a42d120, envp = 0x55917a42a8f0,
            filename = 0x7ffda5b2c683 
"/data/poky-tmp/master/build/work/intel_corei7_64-poky-linux/core-image-weston/1.0-r0/rootfs/usr/bin/fc-cache",
 core_dump = 0x559176d76ed0 <elf_core_dump>}
          ts = <optimized out>
          env = 0x55917a41c2a0
          cpu = 0x55917a414010
          target_environ = 0x55917a42a8f0
          wrk = 0x55917a42ac30
          target_argv = 0x55917a42d120
          target_argc = 5
          i = <optimized out>
          ret = <optimized out>
          execfd = <optimized out>

  (I'll reproduce this with glibc debug symbols shortly)

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1715162/+subscriptions