linux-kernel - [tip: locking/urgent] kprobe/static_call: Restore missing static_call_text

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Date:   Mon, 05 Jul 2021 07:53:32 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Masami Hiramatsu <mhiramat@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: locking/urgent] kprobe/static_call: Restore missing
 static_call_text_reserved()

The following commit has been merged into the locking/urgent branch of tip:

Commit-ID:     1dcba646c86dc86114ac666a1887e84282154515
Gitweb:        https://git.kernel.org/tip/1dcba646c86dc86114ac666a1887e84282154515
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Mon, 28 Jun 2021 13:24:12 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Fri, 02 Jul 2021 15:58:27 +02:00

kprobe/static_call: Restore missing static_call_text_reserved()

Restore two hunks from commit 6333e8f73b83 ("static_call: Avoid
kprobes on inline static_call()s") that went walkabout.

Fixes: 76d4acf22b48 ("Merge tag 'perf-kprobes-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip")
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Masami Hiramatsu <mhiramat@...nel.org>
Link: https://lore.kernel.org/r/20210628113045.167127609@infradead.org
---
 kernel/kprobes.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index e41385a..069388d 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -35,6 +35,7 @@
 #include <linux/ftrace.h>
 #include <linux/cpu.h>
 #include <linux/jump_label.h>
+#include <linux/static_call.h>
 #include <linux/perf_event.h>
 
 #include <asm/sections.h>
@@ -1551,6 +1552,7 @@ static int check_kprobe_address_safe(struct kprobe *p,
 	if (!kernel_text_address((unsigned long) p->addr) ||
 	    within_kprobe_blacklist((unsigned long) p->addr) ||
 	    jump_label_text_reserved(p->addr, p->addr) ||
+	    static_call_text_reserved(p->addr, p->addr) ||
 	    find_bug((unsigned long)p->addr)) {
 		ret = -EINVAL;
 		goto out;