[PATCH 3/3] livepatch: Use FTRACE_OPS_FL_PERMANENT
From: Miroslav Benes
Date: Mon Oct 07 2019 - 04:17:26 EST
Use FTRACE_OPS_FL_PERMANENT flag to be immune to toggling the
'ftrace_enabled' sysctl knob.
Signed-off-by: Miroslav Benes <mbenes@xxxxxxx>
---
kernel/livepatch/patch.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/livepatch/patch.c b/kernel/livepatch/patch.c
index bd43537702bd..b552cf2d85f8 100644
--- a/kernel/livepatch/patch.c
+++ b/kernel/livepatch/patch.c
@@ -196,7 +196,8 @@ static int klp_patch_func(struct klp_func *func)
ops->fops.func = klp_ftrace_handler;
ops->fops.flags = FTRACE_OPS_FL_SAVE_REGS |
FTRACE_OPS_FL_DYNAMIC |
- FTRACE_OPS_FL_IPMODIFY;
+ FTRACE_OPS_FL_IPMODIFY |
+ FTRACE_OPS_FL_PERMANENT;
list_add(&ops->node, &klp_ops);
--
2.23.0