tmp_ops.func_hash->filter_hash is annotated __rcu, but
update_ftrace_direct_mod() assigns hash to it directly. Sparse reports an
address-space mismatch.
Use rcu_assign_pointer() for the assignment.
Fixes: 50b35c9e50a8 ("ftrace: Use hash argument for tmp_ops in
update_ftrace_direct_mod")
Reported-by: kernel test robot <[email protected]>
Closes:
https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Leon Hwang <[email protected]>
---
kernel/trace/ftrace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 53d5db60bfa5..673a54fdf392 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -6675,7 +6675,7 @@ int update_ftrace_direct_mod(struct ftrace_ops *ops,
struct ftrace_hash *hash, b
/* Enable the tmp_ops to have the same functions as the hash object. */
ftrace_ops_init(&tmp_ops);
- tmp_ops.func_hash->filter_hash = hash;
+ rcu_assign_pointer(tmp_ops.func_hash->filter_hash, hash);
err = register_ftrace_function_nolock(&tmp_ops);
if (err)
--
2.55.0
