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crosvm/seccomp/x86_64/tpm_device.policy

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tpm: Virtio tpm device This CL adds a "tpm" Cargo cfg to crosvm which enables a TPM device backed by libtpm2 simulator. Tested by running the following inside cros_sdk: LIBRARY_PATH=~/src/minijail LD_LIBRARY_PATH=~/src/minijail \ cargo run --release \ --features tpm \ -- \ run \ -r rootfs.ext4 \ --seccomp-policy-dir seccomp/x86_64/ \ -p init=/bin/bash \ -p panic=-1 \ --disable-sandbox \ vmlinux.bin with a Linux image built from CL:1387655. The TPM self test completes successfully with the following output: https://paste.googleplex.com/5996075978588160?raw Justin's TPM playground runs with the following trace output. https://paste.googleplex.com/4909751007707136?raw Design doc: go/vtpm-for-glinux TEST=ran TPM playground program inside crosvm TEST=local kokoro BUG=chromium:911799 Change-Id: I2feb24a3e38cba91f62c6d2cd1f378de4dd03ecf Reviewed-on: https://chromium-review.googlesource.com/1387624 Commit-Ready: David Tolnay <dtolnay@chromium.org> Tested-by: David Tolnay <dtolnay@chromium.org> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Dylan Reid <dgreid@chromium.org>
2018-12-20 19:49:46 +00:00
# Copyright 2018 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
tpm: Update tpm device policy to support libtpm2 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>
2019-03-02 00:13:27 +00:00
# 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
fstat: 1
fsync: 1
ftruncate: 1
getuid: 1
lseek: 1
mkdir: 1
open: 1
openat: 1
seccomp: return error from socket for TPM device The crosvm TPM process calls ssleay_rand_bytes(), which in some cases attempts to acquire entropy through an EGD ("entropy gathering daemon") - see OpenSSL's RAND_query_egd_bytes(). Attempting to communicate with this daemon by creating a socket would cause the process to exit currently because the syscall whitelist did not allow socket() or connect(). Since we don't have an EGD and don't want to expose it to the sandboxed TPM process anyway, modify the TPM seccomp policy to cause socket() to return an error rather than aborting. BUG=None TEST=`vmc start --software-tpm termina` Change-Id: Ib7c6bceced0f6cbe7199614ece8446aa300cec1e Signed-off-by: Daniel Verkamp <dverkamp@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1684411 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Vadim Sukhomlinov <sukhomlinov@chromium.org> Reviewed-by: Zach Reizner <zachr@chromium.org>
2019-05-16 18:14:00 +00:00
socket: return EACCES
tpm: Update tpm device policy to support libtpm2 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>
2019-03-02 00:13:27 +00:00
stat: 1
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