On Fri, Mar 07, 2014 at 06:29:13PM +0400, Pavel Emelyanov wrote: > On 03/08/2014 06:20 AM, Artem Fetishev wrote: > > https://bugzilla.kernel.org/show_bug.cgi?id=68991 > > > > The expected logic of proc_map_files_get_link() is either to return 0 and > > initialize 'path' or return an error and leave 'path' uninitialized. By the > > time > > dname_to_vma_addr() returns 0 the corresponding vma may have already be > > gone. In > > this case the path is not initialized but the return value is still 0. This > > results in 'general protection fault' inside d_path(). > > > > Steps to reproduce: > > CONFIG_CHECKPOINT_RESTORE=y > > > > fd = open(...); > > while (1) { > > mmap(fd, ...); > > munmap(fd, ...); > > } > > > > ls -la /proc/$PID/map_files > > > > Signed-off-by: Artem Fetishev <artem_fetis...@epam.com> > > Signed-off-by: Aleksandr Terekhov <aleksandr_terek...@epam.com> > > Acked-by: Pavel Emelyanov <xe...@parallels.com>
Good catch, thanks! Acked-by: Cyrill Gorcunov <gorcu...@openvz.org> I suppose this is a stable@ material. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
