diff options
| author | Leon Hwang <leon.hwang@linux.dev> | 2026-09-11 22:25:12 +0800 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2026-09-12 13:27:29 -0400 |
| commit | b4dcc18b97913888e8d009624e07c8014ce41b84 (patch) | |
| tree | 8cb9fec28c29104b47c391e8b0e4198f263dc172 | |
| parent | 815e07c8fe885a87751c2496a30ae0dcd4118210 (diff) | |
ftrace: Use rcu_assign_pointer() for tmp_ops filter hash
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.
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260911142512.19344-1-leon.hwang@linux.dev
Fixes: 50b35c9e50a8 ("ftrace: Use hash argument for tmp_ops in update_ftrace_direct_mod")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202609110704.Q3M5vCDV-lkp@intel.com/
Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | kernel/trace/ftrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
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) |