On 05/13/2013 09:12 AM, richard -rw- weinberger wrote: > This looks like another issue. > Are you testing process_vm_writev() with trinity? > Looks like it managed to overwrite the stub page of a process, which > is not good. nope, it is the mremap syscall.
A command like $>trinity -c mremap -N 10 immediately after starting a 32 bit Gentoo linux guest with current kernel 3.10-rc1-... + strnlen + stub4 patch works, but later a $>trinity -c mremap -N 1000 yields into 2013-05-15T21:02:04.061+02:00 trinity kernel: Stub registers - 2013-05-15T21:02:04.061+02:00 trinity kernel: 0 - 100000 2013-05-15T21:02:04.061+02:00 trinity kernel: 1 - 300000 2013-05-15T21:02:04.061+02:00 trinity kernel: 2 - 0 2013-05-15T21:02:04.061+02:00 trinity kernel: 3 - 0 2013-05-15T21:02:04.061+02:00 trinity kernel: 4 - 0 2013-05-15T21:02:04.061+02:00 trinity kernel: 5 - 0 2013-05-15T21:02:04.061+02:00 trinity kernel: 6 - 0 2013-05-15T21:02:04.061+02:00 trinity kernel: 7 - 7b 2013-05-15T21:02:04.061+02:00 trinity kernel: 8 - 7b 2013-05-15T21:02:04.065+02:00 trinity kernel: 9 - 0 2013-05-15T21:02:04.065+02:00 trinity kernel: 10 - 33 2013-05-15T21:02:04.065+02:00 trinity kernel: 11 - ffffffff 2013-05-15T21:02:04.065+02:00 trinity kernel: 12 - 1000c3 2013-05-15T21:02:04.065+02:00 trinity kernel: 13 - 73 2013-05-15T21:02:04.065+02:00 trinity kernel: 14 - 10206 2013-05-15T21:02:04.065+02:00 trinity kernel: 15 - 101028 2013-05-15T21:02:04.065+02:00 trinity kernel: 16 - 7b 2013-05-15T21:02:04.065+02:00 trinity kernel: wait_stub_done : failed to wait for SIGTRAP, pid = 15692, n = 15692, errno = 0, status = 0xb7f and now that process can't be killed - I had to stop the UML guest. -- MfG/Sincerely Toralf Förster pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3 ------------------------------------------------------------------------------ AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
