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gpu: Add sandboxing support for pvr.

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BUG=chromium:892280
TEST=glxgears with virtio-gpu on hana

Change-Id: Ib92b21c124e30eacb3fc28558e2eb5d8d4a92567
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1717739
Tested-by: kokoro <noreply+kokoro@google.com>
Tested-by: David Riley <davidriley@chromium.org>
Commit-Queue: David Riley <davidriley@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Auto-Submit: David Riley <davidriley@chromium.org>
This commit is contained in:
David Riley 2019-07-24 17:22:50 -07:00 committed by Commit Bot
parent 06787c5b6c
commit 54e660ba8b
2 changed files with 20 additions and 0 deletions
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11
seccomp/arm/gpu_device.policy
View file

@ -44,6 +44,7 @@ sendto: 1
set_robust_list: 1
sigaltstack: 1
write: 1
writev: 1
## Rules specific to gpu
connect: 1
@ -62,3 +63,13 @@ ioctl: arg1 & 0x6400 || arg1 & 0x8000
## mmap/mprotect/open/openat differ from the common_device.policy
mmap2: arg2 == PROT_READ|PROT_WRITE || arg2 == PROT_NONE || arg2 == PROT_READ|PROT_EXEC || arg2 == PROT_WRITE || arg2 == PROT_READ
mprotect: arg2 == PROT_READ|PROT_WRITE || arg2 == PROT_NONE || arg2 == PROT_READ
## Rules specific to pvr
geteuid32: 1
getuid32: 1
lstat64: 1
readlink: 1
gettid: 1
fcntl64: 1
tgkill: 1
clock_gettime: 1

9
src/linux.rs
View file

@ -623,6 +623,15 @@ fn create_gpu_device(
add_crosvm_user_to_jail(&mut jail, "gpu")?;
// pvr driver requires read access to /proc/self/task/*/comm.
let proc_path = Path::new("/proc");
jail.mount(
proc_path,
proc_path,
"proc",
(libc::MS_NOSUID | libc::MS_NODEV | libc::MS_NOEXEC | libc::MS_RDONLY) as usize,
)?;
Some(jail)
}
None => None,