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static_call: Avoid kprobes on inline static_call()s

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Similar to how we disallow kprobes on any other dynamic text
(ftrace/jump_label) also disallow kprobes on inline static_call()s.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200818135804.744920586@infradead.org
This commit is contained in:
Peter Zijlstra
2020-08-18 15:57:43 +02:00
committed by Ingo Molnar
parent 9183c3f9ed
commit 6333e8f73b
4 changed files with 84 additions and 1 deletions
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2
kernel/kprobes.c
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@@ -36,6 +36,7 @@
#include <linux/cpu.h>
#include <linux/jump_label.h>
#include <linux/perf_event.h>
#include <linux/static_call.h>
#include <asm/sections.h>
#include <asm/cacheflush.h>
@@ -1634,6 +1635,7 @@ 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;