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| author | Liao Chang <liaochang1@huawei.com> | 2022-05-25 10:02:41 +0200 |
|---|---|---|
| committer | Guo Ren <guoren@linux.alibaba.com> | 2022-07-23 03:36:14 +0200 |
| commit | a2310c74d418deca0f1d749c45f1f43162510f51 (patch) | |
| tree | 69a0d22e32cfbcd7bcdde2917901f3fe526da8dd /arch/csky/kernel/probes/kprobes.c | |
| parent | Linux 5.19-rc7 (diff) | |
| download | linux-a2310c74d418deca0f1d749c45f1f43162510f51.tar.xz linux-a2310c74d418deca0f1d749c45f1f43162510f51.zip | |
csky/kprobe: reclaim insn_slot on kprobe unregistration
On kprobe registration kernel allocate one insn_slot for new kprobe,
but it forget to reclaim the insn_slot on unregistration, leading to a
potential leakage.
Reported-by: Chen Guokai <chenguokai17@mails.ucas.ac.cn>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Liao Chang <liaochang1@huawei.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Diffstat (limited to 'arch/csky/kernel/probes/kprobes.c')
| -rw-r--r-- | arch/csky/kernel/probes/kprobes.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/csky/kernel/probes/kprobes.c b/arch/csky/kernel/probes/kprobes.c index 34ba684d5962..3c6e5c725d81 100644 --- a/arch/csky/kernel/probes/kprobes.c +++ b/arch/csky/kernel/probes/kprobes.c @@ -124,6 +124,10 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p) void __kprobes arch_remove_kprobe(struct kprobe *p) { + if (p->ainsn.api.insn) { + free_insn_slot(p->ainsn.api.insn, 0); + p->ainsn.api.insn = NULL; + } } static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb) |