[PATCH] tracing: fprobe: Fix to init fprobe_ip_table earlier

From: Masami Hiramatsu (Google)
Date: Thu Oct 02 2025 - 04:46:09 EST


From: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>

Since the fprobe_ip_table is used from module unloading in
the failure path of load_module(), it must be initialized in
the earlier timing than late_initcall(). Unless that, the
fprobe_module_callback() will use an uninitialized spinlock of
fprobe_ip_table.

Initialize fprobe_ip_table in core_initcall which is the same
timing as ftrace.

Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-lkp/202509301440.be4b3631-lkp@xxxxxxxxx
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
---
kernel/trace/fprobe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c
index 95e43814b85b..99d83c08b9e2 100644
--- a/kernel/trace/fprobe.c
+++ b/kernel/trace/fprobe.c
@@ -847,4 +847,4 @@ static int __init fprobe_initcall(void)
rhltable_init(&fprobe_ip_table, &fprobe_rht_params);
return 0;
}
-late_initcall(fprobe_initcall);
+core_initcall(fprobe_initcall);