Re: [LTP] [PATCH] mprotect04: fix powerpc crash when copying exec_func

2015-09-10 Thread Jan Stancek
- Original Message - > From: "Cyril Hrubis" <chru...@suse.cz> > To: "Jan Stancek" <jstan...@redhat.com> > Cc: ltp-list@lists.sourceforge.net > Sent: Wednesday, 9 September, 2015 3:26:42 PM > Subject: Re: [LTP] [PATCH] mprotect04: fix

Re: [LTP] [PATCH] mprotect04: fix powerpc crash when copying exec_func

2015-09-09 Thread Cyril Hrubis
Hi! > Testcase tried to copy page size area starting at _func. > This results in crash on powerpc, because _func is too close > to end of page and subsequent page is not mapped: I was wondering about this problem when I was fixing the test, but could not actually hit it. > -static void

Re: [LTP] [PATCH] mprotect04: fix powerpc crash when copying exec_func

2015-09-09 Thread Jan Stancek
- Original Message - > From: "Cyril Hrubis" <chru...@suse.cz> > To: "Jan Stancek" <jstan...@redhat.com> > Cc: ltp-list@lists.sourceforge.net > Sent: Wednesday, 9 September, 2015 3:09:34 PM > Subject: Re: [LTP] [PATCH] mprotect04: fix

Re: [LTP] [PATCH] mprotect04: fix powerpc crash when copying exec_func

2015-09-09 Thread Jan Stancek
- Original Message - > From: "Cyril Hrubis" <chru...@suse.cz> > To: "Jan Stancek" <jstan...@redhat.com> > Cc: ltp-list@lists.sourceforge.net > Sent: Wednesday, 9 September, 2015 2:37:37 PM > Subject: Re: [LTP] [PATCH] mprotect04: fix

Re: [LTP] [PATCH] mprotect04: fix powerpc crash when copying exec_func

2015-09-09 Thread Cyril Hrubis
Hi! > It doesn't seem reliable: > > open("/dev/null", O_WRONLY|O_CREAT, 0644) = 3 > write(3, NULL, 1) = 1 > close(3)= 0 > > I'm seeing this on RHEL6.7 kernel, I haven't tried latest upstream yet. Ah, you are right, the memory is not touched