Indirect calls can happen when RCU is not watching, so we need to wake
it up again for the CFI shadow and __module_address. As these calls can
happen anywhere, use rcu_nmi_enter() similarly to kernel_text_address(),
and switch to rcu_read_lock_sched() for shadow access.
Bug: 169017431
Change-Id: Iebb857df898e644b4952a62d86fa5ff9852b5711
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
In commit d71a92631c ("ANDROID: add support for Clang's Control Flow
Integrity (CFI)") some new symbols were exported, but they should have
been set as _GPL symbols.
Fix this up by properly.
Bug: 145210207
Cc: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I6ecbb0f3b33f7c02c9b75bb7d80c35ce80e553f3
This change adds the CONFIG_CFI_CLANG option, CFI error handling,
and a faster look-up table for cross module CFI checks.
Bug: 145210207
Change-Id: I118303de50114ca6f85d89a7d69c5cbc47e2f5c0
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
