diff options
| author | Li Qiang <liq3ea@163.com> | 2022-11-04 00:49:31 +0100 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2022-11-04 00:49:31 +0100 |
| commit | 4a6f316d6855a434f56dbbeba05e14c01acde8f8 (patch) | |
| tree | 3b8675c2f6394755118a8858aecbb24802d873ea /kernel/kprobes.c | |
| parent | ftrace: Fix use-after-free for dynamic ftrace_ops (diff) | |
| download | linux-4a6f316d6855a434f56dbbeba05e14c01acde8f8.tar.xz linux-4a6f316d6855a434f56dbbeba05e14c01acde8f8.zip | |
kprobe: reverse kp->flags when arm_kprobe failed
In aggregate kprobe case, when arm_kprobe failed,
we need set the kp->flags with KPROBE_FLAG_DISABLED again.
If not, the 'kp' kprobe will been considered as enabled
but it actually not enabled.
Link: https://lore.kernel.org/all/20220902155820.34755-1-liq3ea@163.com/
Fixes: 12310e343755 ("kprobes: Propagate error from arm_kprobe_ftrace()")
Cc: stable@vger.kernel.org
Signed-off-by: Li Qiang <liq3ea@163.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Diffstat (limited to 'kernel/kprobes.c')
| -rw-r--r-- | kernel/kprobes.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 3220b0a2fb4a..cd9f5a66a690 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -2429,8 +2429,11 @@ int enable_kprobe(struct kprobe *kp) if (!kprobes_all_disarmed && kprobe_disabled(p)) { p->flags &= ~KPROBE_FLAG_DISABLED; ret = arm_kprobe(p); - if (ret) + if (ret) { p->flags |= KPROBE_FLAG_DISABLED; + if (p != kp) + kp->flags |= KPROBE_FLAG_DISABLED; + } } out: mutex_unlock(&kprobe_mutex); |