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Subject[Regression?] "selinux: add a map permission check for mmap" causing AOSP to fail booting
Hey folks,
I updated my HiKey kernel tree to linus/master today and it stopped
booting (hitting errors at init and reseting immediately into
bootloader mode):

[ 5.289827] init: Skipped setting INIT_AVB_VERSION (not in recovery mode)
[ 5.296709] init: Loading SELinux policy
[ 5.334521] SELinux: Permission validate_trans in class security
not defined in policy.
[ 5.342828] SELinux: Permission map in class file not defined in policy.
[ 5.349690] SELinux: Permission map in class dir not defined in policy.
[ 5.356464] SELinux: Permission map in class lnk_file not defined in policy.
[ 5.363666] SELinux: Permission map in class chr_file not defined in policy.
[ 5.370870] SELinux: Permission map in class blk_file not defined in policy.
[ 5.378070] SELinux: Permission map in class sock_file not defined
in policy.
[ 5.385351] SELinux: Permission map in class fifo_file not defined
in policy.
[ 5.392647] SELinux: Permission map in class socket not defined in policy.
[ 5.399670] SELinux: Permission map in class tcp_socket not
defined in policy.
[ 5.407042] SELinux: Permission map in class udp_socket not
defined in policy.
[ 5.414415] SELinux: Permission map in class rawip_socket not
defined in policy.
[ 5.421969] SELinux: Permission map in class netlink_socket not
defined in policy.
...
[ 5.850590] SELinux: the above unknown classes and permissions will be denied
[ 5.892283] audit: type=1403 audit(104.182:2): policy loaded
auid=4294967295 ses=4294967295
[ 5.892510] selinux: SELinux: Loaded policy from /sepolicy
[ 5.892510]
[ 5.907690] audit: type=1404 audit(104.183:3): enforcing=1
old_enforcing=0 auid=4294967295 ses=4294967295
[ 5.911853] selinux: selinux_android_file_context: Error getting
file context handle (Permission denied)
[ 5.911853]
[ 5.911968] init: execv("/init") failed: Permission denied
[ 5.911987] init: Security failure...
[ 5.912008] init: panic: rebooting to bootloader
[ 5.912034] init: Reboot start, reason: reboot, rebootTarget: bootloader


I bisected the issue down to 3ba4bf5f1e2c (selinux: add a map
permission check for mmap).

It seems every -rc1 I hit something like this w/ selinux, and
sometimes it is just that I need to fix my sepolicy files, but I'm not
really sure which this one is.

Reverting the identified commit allows things to boot normally.

Ideas?

thanks
-john

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