Re: [PATCH bpf-next] bpf: Lock bpf_trace_printk's tmp buf before it is written to

From: Alexei Starovoitov
Date: Tue Apr 27 2021 - 11:08:21 EST

On Tue, Apr 27, 2021 at 4:30 AM Florent Revest <revest@xxxxxxxxxxxx> wrote:
> bpf_trace_printk uses a shared static buffer to hold strings before they
> are printed. A recent refactoring moved the locking of that buffer after
> it gets filled by mistake.
> Fixes: d9c9e4db186a ("bpf: Factorize bpf_trace_printk and bpf_seq_printf")
> Reported-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Florent Revest <revest@xxxxxxxxxxxx>


Pls send v2 of bstr_printf series as soon as possible. Thanks!