diff mbox series

[v3.5,25/28] kprobes: Use RCU in all users of __module_text_address().

Message ID 20250129084925.9ppBjGLC@linutronix.de (mailing list archive)
State New
Headers show
Series None | expand

Commit Message

Sebastian Andrzej Siewior Jan. 29, 2025, 8:49 a.m. UTC 
__module_text_address() can be invoked within a RCU section, there is no
requirement to have preemption disabled.

Replace the preempt_disable() section around __module_text_address()
with RCU.

Cc: David S. Miller <davem@davemloft.net>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Naveen N Rao <naveen@kernel.org>
Cc: linux-trace-kernel@vger.kernel.org
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
Update due to the collision during the merge window.

 kernel/kprobes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 0305692106709..9c8afbb957b0f 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1547,7 +1547,7 @@  static int check_kprobe_address_safe(struct kprobe *p,
 	/* Ensure the address is in a text area, and find a module if exists. */
 	*probed_mod = NULL;
 	if (!core_kernel_text((unsigned long) p->addr)) {
-		guard(preempt)();
+		guard(rcu)();
 		*probed_mod = __module_text_address((unsigned long) p->addr);
 		if (!(*probed_mod))
 			return -EINVAL;