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Wed, 25 Feb 2026 22:16:29 -0800 (PST) From: Qing Wang To: syzbot+3b5dd2030fe08afdf65d@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [trace?] WARNING in tracing_buffers_mmap_close (3) Date: Thu, 26 Feb 2026 14:16:25 +0800 Message-Id: <20260226061625.30751-1-wangqing7171@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <699fc6d3.a00a0220.21906d.0073.GAE@google.com> References: <699fc6d3.a00a0220.21906d.0073.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/trace/trace.c b/kernel/trace/trace.c index 23de3719f495..c74ba9c8c98e 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -8251,12 +8251,14 @@ static int tracing_buffers_mmap(struct file *filp, struct vm_area_struct *vma) return ret; ret = ring_buffer_map(iter->array_buffer->buffer, iter->cpu_file, vma); - if (ret) + if (ret) { put_snapshot_map(iter->tr); + return ret; + } vma->vm_ops = &tracing_buffers_vmops; - return ret; + return 0; } static const struct file_operations tracing_buffers_fops = {