Le 24/07/2020 à 23:23, Richard Henderson a écrit : > When the chroot does not have /proc mounted, we can read neither > /proc/sys/vm/mmap_min_addr nor /proc/sys/maps. > > The enforcement of mmap_min_addr in the host kernel is done by > the security module, and so does not apply to processes owned > by root. Which leads pgd_find_hole_fallback to succeed in probing > a reservation at address 0. Which confuses pgb_reserved_va to > believe that guest_base has not actually been initialized. > > We don't actually want NULL addresses to become accessible, so > make sure that mmap_min_addr is initialized with a non-zero value. > > Buglink: https://bugs.launchpad.net/qemu/+bug/1888728 > Reported-by: John Paul Adrian Glaubitz <glaub...@physik.fu-berlin.de> > Signed-off-by: Richard Henderson <richard.hender...@linaro.org> > --- > linux-user/main.c | 16 ++++++++++++++-- > 1 file changed, 14 insertions(+), 2 deletions(-) >
Richard, do you want to add this fix in one of your branches PR? In this case: Acked-by: Laurent Vivier <laur...@vivier.eu> Otherwise I can prepare a small one for linux-user, adding one or two fixes... Thanks, Laurent
