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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@infradead.org>
AuthorDate: Mon, 28 Jun 2021 13:24:12 +02:00
Committer: Peter Zijlstra <peterz@infradead.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@infradead.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.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;
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