diff options
| -rw-r--r-- | kernel/events/uprobes.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 93d939c8..7e61c8c 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -1511,6 +1511,16 @@ static unsigned long get_trampoline_vaddr(void) return trampoline_vaddr; } +static void cleanup_return_instances(struct uprobe_task *utask, struct pt_regs *regs) +{ + struct return_instance *ri = utask->return_instances; + while (ri && !arch_uretprobe_is_alive(ri, regs)) { + ri = free_ret_instance(ri); + utask->depth--; + } + utask->return_instances = ri; +} + static void prepare_uretprobe(struct uprobe *uprobe, struct pt_regs *regs) { struct return_instance *ri; @@ -1541,6 +1551,9 @@ static void prepare_uretprobe(struct uprobe *uprobe, struct pt_regs *regs) if (orig_ret_vaddr == -1) goto fail; + /* drop the entries invalidated by longjmp() */ + cleanup_return_instances(utask, regs); + /* * We don't want to keep trampoline address in stack, rather keep the * original return address of first caller thru all the consequent |
