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ftrace: Use rcu_assign_pointer() for tmp_ops filter hash

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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: 50b35c9e50 ("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>
This commit is contained in:
Leon Hwang
2026-09-12 13:27:29 -04:00
committed by Steven Rostedt
parent 815e07c8fe
commit b4dcc18b97
1 changed files with 1 additions and 1 deletions
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kernel/trace/ftrace.c
+1 -1
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@@ -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)