Re: make run_tests -C proc: proc-pid-vm assertion failed.

[Alexey Dobriyan]

On Fri, Sep 09, 2022 at 10:19:16AM +0800, Jie2x Zhou wrote:
> hi,
> 
> The test error is caused by g_vsyscall set failed.


> Error output:
>  selftests: proc: proc-pid-vm
>  proc-pid-vm: proc-pid-vm.c:389: main: Assertion `rv == len' failed.
>  Aborted
> 
> g_vsyscall is set to 0.
> In proc-pid-vm.c:
> /*
>  * 0: vsyscall VMA doesn't exist        vsyscall=none
>  * 1: vsyscall VMA is r-xp              vsyscall=emulate
>  * 2: vsyscall VMA is --xp              vsyscall=xonly
>  */
> static int g_vsyscall;
> static const char *str_vsyscall;
> 
> static const char str_vsyscall_0[] = "";
> static const char str_vsyscall_1[] =
> "ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]\n";
> static const char str_vsyscall_2[] =
> "ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0                  [vsyscall]\n";
> 
> The /proc/%u/maps output is:
> buf=100000000-100001000 r-xp 00000000 00:2d 2                                /tmp/#2 (deleted)
> ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0                  [vsyscall]
> 
> So the g_vsyscall should be 2 according to commentary(2: vsyscall VMA is --xp).
> Is it a bug?

Can't reproduce. Please, post "strace -f ./proc-pid-vm".