where are the bug ?

[Anuz Pratap Singh Tomar]

On Fri, Oct 19, 2012 at 2:46 PM, Fan Yang <lljyangfan at gmail.com> wrote:

>
>
> 2012/10/19 Arun KS <getarunks at gmail.com>
> >
> > Hi Fan,
> >
> > On Fri, Oct 19, 2012 at 6:50 PM, Fan Yang <lljyangfan at gmail.com> wrote:
> >>
> >> HI ALL:
> >>     I just run a module on my machine, but it  can't work. When the
> module run the kernel will painc. I don't know where is wrong. This is my
> code:
> >>
> >>  1 #include<linux/module.h>
> >>   2 #include<linux/kernel.h>
> >>   3 #include<linux/init.h>
> >>   4 #include<linux/sched.h>
> >>   5
> >>   6 int input = 1;
> >>   7 module_param (input, int, S_IRUGO);
> >>   8
> >>   9 static int __init printvma_init (void)
> >>  10 {
> >>  11     struct vm_area_struct *p, *start;
> >>  12     int i;
> >>  13     struct task_struct *thread;
>
> >>  14
> >>  15     thread = current;
> >>  16
> >>  17     while (1)
> >>  18     {
> >>  19         if (thread->pid == input)
> >>  20             break;
> >>  21         thread = list_entry (thread->tasks.next, struct
> task_struct, tasks);
> >>  22     }
> >>  23     p = thread->mm->mmap;
> >>  24
> >>  25     do{
> >>  26         printk ("%lx\t%lx\t%s\n", p->vm_start,\
> >>  27                 p->vm_end, p->vm_file->f_path.dentry->d_iname);
> >>  28         p = p->vm_next;
> >>  29     }while (p != NULL);
> >>  30
> >>  31     printk ("vm_file address is:%d\tf_path address is:%d\
> >>  32             \tname is:%s",& p->vm_file->f_path,\
> >>  33             p->vm_file->f_path.dentry->d_iname);
> >>  34
> >>  35     printk ("info from the kernel space:%s\n", thread->comm);
> >>  36     return 0;
> >>  37 }
> >>  38
> >>  39 static void __exit printvma_exit (void)
> >>  40 {
> >>  41     printk ("the module will leave the kernel space..\n");
> >>  42 }
> >>  43
> >>  44 module_init (printvma_init);
> >>  45 module_exit (printvma_exit);
> >>  46 MODULE_LICENSE ("GPL");
> >>
> >>
> >> what's wrong?
> >
> >
> > It would be good if you paste your crash log here.
> >
> > Thanks,
> > Arun
> >>
> >>
> >> thanks
> >>
> >> _______________________________________________
> >> Kernelnewbies mailing list
> >> Kernelnewbies at kernelnewbies.org
> >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >>
> >
> The module run in a virtual machine, I can't control the machine when it
> crashed, so I just got a picture when the kernel panic.
>
> you can run the module under uml, it wont be hard to copy  the crash log
from terminal in uml.

>
>
>
>
> Thanks
> Fan
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
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