lkml.org 
[lkml]   [2018]   [Jan]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Query: Crash is coming during /prod/PID/stat and do_exit of same task
From
Date
On 1/10/2018 10:50 AM, Alexey Dobriyan wrote:

>> We are seeing crash in do_task_stat while accessing stack pointer, It
>> seems same task has already completed do_exit call.
>> So it seems a race between them:
> Please, post exact kernel version and struct task_struct::usage if you
> still have that kernel core (or even full task_struct)

Hi Alexey,

We are working on 4.9.65 and Please find below usage value and other task_struct value,
please let me know if some other data required as well.

crash_64> struct task_struct.usage -x  0xFFFFFFE80D8C2280

  usage = {

    counter = 0x4

  }

struct task_struct.flags -x 0xFFFFFFE80D8C2280

  flags = 0x40870c

crash_64> struct task_struct.exit_code -x 0xFFFFFFE80D8C2280

  exit_code = 0x6

 struct task_struct.state -x 0xFFFFFFE80D8C2280

  state = 0x40


Please find below crash stack:

-000|user_stack_pointer(inline)

-000|do_task_stat(

    |    m = 0xFFFFFFE7A5CD7380,

    |    ns = 0xFFFFFF8E7C43C748,

    |  ?,

    |    task = 0xFFFFFFE80D8C2280,

    |  ?)

    |  tty_pgrp = 0

    |  ppid = 2084696064

    |  sid = 0

    |  mm = 0xFFFFFFE7B4424140

    |  tcomm = (84, 9, 71, 122, 142, 255, 255, 255, 48, 253, 240, 165, 231, 255, 255, 255)

    |  flags = 18446743969119403392

-001|proc_tgid_stat(

    |    m = 0xFFFFFFE7A5CD7380,

    |  ?,

    |  ?,

    |  ?)

-002|atomic_sub_return(inline)

Regards
Gaurav

--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.

\
 
 \ /
  Last update: 2018-01-16 06:36    [W:1.670 / U:0.524 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site