[GIT PULL] seccomp fixes for v5.5-rc5

From: Kees Cook
Date: Thu Jan 02 2020 - 16:28:35 EST

Hi Linus,

Please pull these seccomp fixes for v5.5-rc5. The bulk of this is fixing
the surrounding samples and selftests so that seccomp can correctly
validate the seccomp_notify_ioctl buffer as being initially zeroed.



The following changes since commit fd6988496e79a6a4bdb514a4655d2920209eb85d:

Linux 5.5-rc4 (2019-12-29 15:29:16 -0800)

are available in the Git repository at:

https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/seccomp-v5.5-rc5

for you to fetch changes up to e4ab5ccc357b978999328fadae164e098c26fa40:

selftests/seccomp: Catch garbage on SECCOMP_IOCTL_NOTIF_RECV (2020-01-02 13:15:45 -0800)

Fixes for seccomp_notify_ioctl uapi sanity

- Fix samples and selftests to zero passed-in buffer (Sargun Dhillon)
- Enforce zeroed buffer checking (Sargun Dhillon)
- Verify buffer sanity check in selftest (Sargun Dhillon)

Sargun Dhillon (4):
samples/seccomp: Zero out members based on seccomp_notif_sizes
selftests/seccomp: Zero out seccomp_notif
seccomp: Check that seccomp_notif is zeroed out by the user
selftests/seccomp: Catch garbage on SECCOMP_IOCTL_NOTIF_RECV

kernel/seccomp.c | 7 +++++++
samples/seccomp/user-trap.c | 4 ++--
tools/testing/selftests/seccomp/seccomp_bpf.c | 15 ++++++++++++++-
3 files changed, 23 insertions(+), 3 deletions(-)

Kees Cook