linux-kernel - RE: Re: [PATCH 1/1] Smack:- Fix the issue of wrong info printed in ptrace error logs

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Date:   Tue, 21 Dec 2021 22:12:33 +0900
From:   Vishal Goel <vishal.goel@...sung.com>
To:     Casey Schaufler <casey@...aufler-ca.com>,
        "linux-security-module@...r.kernel.org" 
        <linux-security-module@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     AMIT SAHRAWAT <a.sahrawat@...sung.com>,
        Vaneet Narang <v.narang@...sung.com>,
        "linux-audit@...hat.com" <linux-audit@...hat.com>
Subject: RE: Re: [PATCH 1/1] Smack:- Fix the issue of wrong info printed in
 ptrace error logs

Hi,

>>> Signed-off-by: Vishal Goel <vishal.goel@...sung.com>
> 
> What test case do you have that generates these records?

Test case for 1st log:-
void main(int argc,char *argv[])
{
        int pid;

        if (argc < 2) {
                printf("enter pid of the tracee process\n");
                exit(0);
        }

        pid = atoi(argv[1]);
        fprintf(stderr,"Inside\n");
        ptrace(PTRACE_ATTACH, pid,NULL,NULL);
        while(1)
        {
                sleep(10);
        }
}

Test case for 2nd log:-
void main(int argc,char *argv[])
{
        int pid;

        pid = getpid();
        fprintf(stderr,"Inside\n");
        ptrace(PTRACE_TRACEME, pid,NULL,NULL);
        while(1)
        {
               sleep(10);
        }
}

Test case for 3rd log:-
void main()
{
        int pid;
        char *argv[2];

        fprintf(stderr,"Inside\n");
        pid = fork();
        if(pid == 0) {
                argv[0] = "/tst_pt";
                argv[1] = NULL;

                if(ptrace(PTRACE_TRACEME, pid,NULL,NULL))
                        printf("attached child\n");

                printf("going for exec\n");
                execv("/tst_pt",argv);
        }
        else
        {
                while(1)
                {
                        sleep(10);
                }
        }
}

>>
>> Added linux-audit to the CC list.
>>

Thanks
Vishal Goel