[Qemu-devel] [Bug 700276] Re: QEMU crashed when GDB request a big size variable information

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

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

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https://bugs.launchpad.net/bugs/700276

Title:
  QEMU crashed when GDB request a big size variable information

Status in QEMU:
  Expired

Bug description:
  Hello,
  My host is Fedora 13. My QEMU version is 0.13.0, I use QEMU with GDB to debug 
Linux kernel(Version 2.6.36.2).

  I use QEMU like this:"qemu -s -S -kernel build/arch/i386/boot/bzImage -hda 
/dev/zero"
  When GDB connected with QEMU, and use gdb command print to look big size 
variable, the qemu is crash down. for example, when I look a task_struct 
variable 'init_task'(print init_task ), the qemu produce the below message and 
exit.

  *** stack smashing detected ***: qemu terminated
  ======= Backtrace: =========
  /lib/libc.so.6(__fortify_fail+0x4d)[0x78a31d]
  /lib/libc.so.6[0x78a2ca]
  qemu[0x8059e21]
  qemu[0x805a0cf]
  qemu[0x80d12a1]
  qemu[0x8189cb8]
  qemu[0x818c3b0]
  /lib/libc.so.6(__libc_start_main+0xe6)[0x6a8cc6]
  ...............
  adbf7000-adbf8000 rw-p 00000000 00:00 0 
  adbf8000-ae3f8000 rw-p 00000000 00:00 0 
  ae3f8000-ae742000 rw-p 00000000 00:00 0 
  ae742000-ae762000 rw-p 00000000 00:00 0 
  ae762000-ae764000 rw-p 00000000 00:00 0 
  ae764000-ae784000 rw-p 00000000 00:00 0 
  ae784000-ae786000 rw-p 00000000 00:00 0 
  ae786000-b6786000 rw-p 00000000 00:00 0 
  b6786000-b7894000 rw-p 00000000 00:00 0 
  b78aa000-b78ab000 rw-p 00000000 00:00 0 
  bfe95000-bfeaa000 rw-p 00000000 00:00 0          [stack]
  已放弃 (core dumped)

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