On 2025/9/24 08:26 Masami Hiramatsu (Google) <[email protected]> write:
> From: Masami Hiramatsu (Google) <[email protected]>
>
> Even if there is a memory allocation failure in fprobe_addr_list_add(),
> there is a partial list of module addresses. So remove the recorded
> addresses from filter if exists.
> This also removes the redundant ret local variable.
>
> Fixes: a3dc2983ca7b ("tracing: fprobe: Cleanup fprobe hash when module
> unloading")
> Signed-off-by: Masami Hiramatsu (Google) <[email protected]>
> ---
> kernel/trace/fprobe.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
Hi, Masami. Should I send the V2 of the patch:
tracing: fprobe: optimization for entry only case
after this series applied?
Thanks!
Menglong Dong
>
> diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c
> index 12ec194fdfed..95e43814b85b 100644
> --- a/kernel/trace/fprobe.c
> +++ b/kernel/trace/fprobe.c
> @@ -434,8 +434,9 @@ static int fprobe_addr_list_add(struct fprobe_addr_list
> *alist, unsigned long ad
> {
> unsigned long *addrs;
>
> - if (alist->index >= alist->size)
> - return -ENOMEM;
> + /* Previously we failed to expand the list. */
> + if (alist->index == alist->size)
> + return -ENOSPC;
>
> alist->addrs[alist->index++] = addr;
> if (alist->index < alist->size)
> @@ -497,7 +498,7 @@ static int fprobe_module_callback(struct notifier_block
> *nb,
> } while (node == ERR_PTR(-EAGAIN));
> rhashtable_walk_exit(&iter);
>
> - if (alist.index < alist.size && alist.index > 0)
> + if (alist.index > 0)
> ftrace_set_filter_ips(&fprobe_graph_ops.ops,
> alist.addrs, alist.index, 1, 0);
> mutex_unlock(&fprobe_mutex);
>
>
>
