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tpm: Update tpm device policy to support libtpm2

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Tested by running the following on a grunt board (Barla) in dev mode
together with CL:1496910:

    sudo crosvm run \
        --root rootfs.ext4 \
        --socket crosvm.sock \
        --seccomp-policy-dir seccomp \
        --software-tpm \
        -p init=/bin/bash \
        -p panic=-1 \
        vmlinux.bin

and confirming that /dev/tpm0 and /dev/tpmrm0 are present in the VM.

I needed to override the common device policy's `open` and `openat` and
was not able to get that working with the existing @include.

Note: untested on arm.

BUG=chromium:921841
TEST=manual testing on grunt

Change-Id: Ied7f18a631ce8c0ae280f8b6c01511ca20c3d1c8
Reviewed-on: https://chromium-review.googlesource.com/1496909
Commit-Ready: David Tolnay <dtolnay@chromium.org>
Tested-by: David Tolnay <dtolnay@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
This commit is contained in:
David Tolnay 2019-03-01 16:13:27 -08:00 committed by chrome-bot
parent 96f2d8ebe2
commit 25a86d99cc
2 changed files with 107 additions and 2 deletions
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55
seccomp/arm/tpm_device.policy
View file

@ -2,4 +2,57 @@
# Use of this source code is governed by a BSD-style license that can be # Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file. # found in the LICENSE file.
@include /usr/share/policy/crosvm/common_device.policy # common policy
brk: 1
clone: arg0 & CLONE_THREAD
close: 1
dup2: 1
dup: 1
epoll_create1: 1
epoll_ctl: 1
epoll_wait: 1
eventfd2: 1
exit: 1
exit_group: 1
futex: 1
getpid: 1
gettimeofday: 1
kill: 1
madvise: arg2 == MADV_DONTNEED || arg2 == MADV_DONTDUMP || arg2 == MADV_REMOVE
mmap2: arg2 in ~PROT_EXEC
mprotect: arg2 in ~PROT_EXEC
mremap: 1
munmap: 1
nanosleep: 1
#open: return ENOENT
#openat: return ENOENT
pipe2: 1
poll: 1
ppoll: 1
prctl: arg0 == PR_SET_NAME
read: 1
recv: 1
recvfrom: 1
recvmsg: 1
restart_syscall: 1
rt_sigaction: 1
rt_sigprocmask: 1
rt_sigreturn: 1
sched_getaffinity: 1
sendmsg: 1
set_robust_list: 1
sigaltstack: 1
write: 1
# tpm-specific policy
chdir: 1
fseek: 1
fstat: 1
fsync: 1
ftruncate: 1
getuid: 1
lseek: 1
mkdir: 1
open: 1
openat: 1
stat: 1

54
seccomp/x86_64/tpm_device.policy
View file

@ -2,4 +2,56 @@
# Use of this source code is governed by a BSD-style license that can be # Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file. # found in the LICENSE file.
@include /usr/share/policy/crosvm/common_device.policy # common policy
brk: 1
clone: arg0 & CLONE_THREAD
close: 1
dup2: 1
dup: 1
epoll_create1: 1
epoll_ctl: 1
epoll_wait: 1
eventfd2: 1
exit: 1
exit_group: 1
futex: 1
getpid: 1
gettimeofday: 1
kill: 1
madvise: arg2 == MADV_DONTNEED || arg2 == MADV_DONTDUMP || arg2 == MADV_REMOVE
mmap: arg2 in ~PROT_EXEC
mprotect: arg2 in ~PROT_EXEC
mremap: 1
munmap: 1
nanosleep: 1
#open: return ENOENT
#openat: return ENOENT
pipe2: 1
poll: 1
ppoll: 1
prctl: arg0 == PR_SET_NAME
read: 1
recvfrom: 1
recvmsg: 1
restart_syscall: 1
rt_sigaction: 1
rt_sigprocmask: 1
rt_sigreturn: 1
sched_getaffinity: 1
sendmsg: 1
set_robust_list: 1
sigaltstack: 1
write: 1
# tpm-specific policy
chdir: 1
fseek: 1
fstat: 1
fsync: 1
ftruncate: 1
getuid: 1
lseek: 1
mkdir: 1
open: 1
openat: 1
stat: 1