[PATCH] kprobes: Replace memcpy() with direct assignment
From: Tiezhu Yang <yangtiezhu@loongson.cn>
Date: 2023-01-31 12:02:03
Also in:
lkml
Subsystem:
kprobes, the rest · Maintainers:
Naveen N Rao, "David S. Miller", Masami Hiramatsu, Linus Torvalds
Just do a direct assignment, then give a chance to probe memcpy() for some archs or kernel versions which do not blacklist memcpy(). Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> --- kernel/kprobes.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 1c18ecf..5a3cf9f 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c@@ -407,8 +407,8 @@ static inline bool kprobe_unused(struct kprobe *p) /* Keep all fields in the kprobe consistent. */ static inline void copy_kprobe(struct kprobe *ap, struct kprobe *p) { - memcpy(&p->opcode, &ap->opcode, sizeof(kprobe_opcode_t)); - memcpy(&p->ainsn, &ap->ainsn, sizeof(struct arch_specific_insn)); + p->opcode = ap->opcode; + p->ainsn = ap->ainsn; } #ifdef CONFIG_OPTPROBES
--
2.1.0