diff options
| author | Peter Zijlstra <[email protected]> | 2021-10-30 07:47:58 +0000 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2021-11-11 12:09:31 +0000 |
| commit | 2105a92748e83e2e3ee6be539da959706bbb3898 (patch) | |
| tree | 04dd3c3a9a55be81189d30054b015b2587dc5968 /drivers/fpga/fpga-bridge.c | |
| parent | Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/t... (diff) | |
| download | kernel-2105a92748e83e2e3ee6be539da959706bbb3898.tar.gz kernel-2105a92748e83e2e3ee6be539da959706bbb3898.zip | |
static_call,x86: Robustify trampoline patching
Add a few signature bytes after the static call trampoline and verify
those bytes match before patching the trampoline. This avoids patching
random other JMPs (such as CFI jump-table entries) instead.
These bytes decode as:
d: 53 push %rbx
e: 43 54 rex.XB push %r12
And happen to spell "SCT".
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/fpga/fpga-bridge.c')
0 files changed, 0 insertions, 0 deletions