On Wed, 17 Oct 2007 16:01:01 +0900 KAMEZAWA Hiroyuki <[EMAIL PROTECTED]> wrote:
> I noticed 32bit binary on x86_64 behavior is changed on 2.6.23-mm1. > > This is a result of pmap after process returns -ENOMEM.(see attached program) > == on 2.6.23 == > errno 12 > 3531: ./malloc > 0000000000001000 6272K ----- [ anon ] > 0000000000621000 100K r-x-- /lib/ld-2.5.so > 000000000063a000 4K r---- /lib/ld-2.5.so > 000000000063b000 4K rw--- /lib/ld-2.5.so > 000000000063c000 8K ----- [ anon ] > 000000000063e000 1244K r-x-- /lib/libc-2.5.so > 0000000000775000 8K r---- /lib/libc-2.5.so > 0000000000777000 4K rw--- /lib/libc-2.5.so > 0000000000778000 12K rw--- [ anon ] > 000000000077b000 123700K ----- [ anon ] > 0000000008048000 4K r-x-- /home/kamezawa/malloc > 0000000008049000 4K rw--- /home/kamezawa/malloc > 000000000804a000 3929824K ----- [ anon ] > 00000000f7f02000 8K rw--- [ anon ] > 00000000f7f04000 100K ----- [ anon ] > 00000000f7f1d000 4K rw--- [ anon ] > 00000000f7f1e000 131812K ----- [ anon ] > 00000000fffd7000 84K rw--- [ stack ] > 00000000fffec000 72K ----- [ anon ] > 00000000ffffe000 4K r-x-- [ anon ] > total 4193272K > == > > == on 2.6.23-mm1== > errno 12 > 3504: ./malloc > 0000000000621000 100K r-x-- /lib/ld-2.5.so > 000000000063a000 4K r---- /lib/ld-2.5.so > 000000000063b000 4K rw--- /lib/ld-2.5.so > 000000000063e000 1244K r-x-- /lib/libc-2.5.so > 0000000000775000 8K r---- /lib/libc-2.5.so > 0000000000777000 4K rw--- /lib/libc-2.5.so > 0000000000778000 12K rw--- [ anon ] > 0000000008048000 4K r-x-- /home/kamezawa/malloc > 0000000008049000 4K rw--- /home/kamezawa/malloc > 0000000055555000 4K rw--- [ anon ] > 0000000055556000 100K ----- [ anon ] > 000000005556f000 8K rw--- [ anon ] > 0000000055671000 2789016K ----- [ anon ] > 00000000ffa17000 84K rw--- [ stack ] > 00000000ffa2c000 5960K ----- [ anon ] > 00000000ffffe000 4K r-x-- [ anon ] > total 2796560K > == So it only managed to allocate half as much virtual memory? Lovely. Thanks for the test case. > Maybe get_unmapped_area() had some change. > Is this intended ? It had better not be. It is due to pie-executable-randomization.patch. That patch has been an ongoing source of trouble. I'll drop it. Again. Guys, please don't resend it until it actually works. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
