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Thu, 26 Feb 2026 19:53:52 -0800 (PST) From: Qing Wang To: syzbot+9ea7c90be2b24e189592@syzkaller.appspotmail.com Cc: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, martin.lau@linux.dev, mathieu.desnoyers@efficios.com, mattbobrowski@google.com, mhiramat@kernel.org, rostedt@goodmis.org, sdf@fomichev.me, song@kernel.org, syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev Subject: Re: [syzbot] [bpf?] [trace?] KASAN: slab-use-after-free Read in bpf_trace_run3 (2) Date: Fri, 27 Feb 2026 11:53:41 +0800 Message-Id: <20260227035341.1108372-1-wangqing7171@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <69a0544c.050a0220.3a55be.0004.GAE@google.com> References: <69a0544c.050a0220.3a55be.0004.GAE@google.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit #syz test diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 2d14fb6d0ed0..038bf4436959 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -3783,6 +3783,8 @@ static void bpf_raw_tp_link_release(struct bpf_link *link) bpf_probe_unregister(raw_tp->btp, raw_tp); bpf_put_raw_tracepoint(raw_tp->btp); + + synchronize_rcu(); } static void bpf_raw_tp_link_dealloc(struct bpf_link *link)