diff options
| author |   Nathan Lynch <nathanl@linux.ibm.com> | 2022-09-26 08:16:43 -0500 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2022-09-28 19:22:14 +1000 |
| commit | b8f3e48834fe8c86b4f21739c6effd160e2c2c19 (patch) | |
| tree | 6658e486f3a3a23d2a418f48986029a54977326f /include/linux/security.h | |
| parent | powerpc/pseries: block untrusted device tree changes when locked down (diff) | |
| download | linux-dev-b8f3e48834fe8c86b4f21739c6effd160e2c2c19.tar.xz linux-dev-b8f3e48834fe8c86b4f21739c6effd160e2c2c19.zip | |
powerpc/rtas: block error injection when locked down
The error injection facility on pseries VMs allows corruption of
arbitrary guest memory, potentially enabling a sufficiently privileged
user to disable lockdown or perform other modifications of the running
kernel via the rtas syscall.
Block the PAPR error injection facility from being opened or called
when locked down.
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Acked-by: Paul Moore <paul@paul-moore.com> (LSM)
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220926131643.146502-3-nathanl@linux.ibm.com
Diffstat (limited to 'include/linux/security.h')
| -rw-r--r-- | include/linux/security.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/security.h b/include/linux/security.h index 7da801ceb5a4..a6d67600759e 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -123,6 +123,7 @@ enum lockdown_reason { LOCKDOWN_XMON_WR, LOCKDOWN_BPF_WRITE_USER, LOCKDOWN_DBG_WRITE_KERNEL, + LOCKDOWN_RTAS_ERROR_INJECTION, LOCKDOWN_INTEGRITY_MAX, LOCKDOWN_KCORE, LOCKDOWN_KPROBES, |