From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A606C4332F for ; Mon, 6 Nov 2023 00:20:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229952AbjKFAUq (ORCPT ); Sun, 5 Nov 2023 19:20:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229447AbjKFAUp (ORCPT ); Sun, 5 Nov 2023 19:20:45 -0500 Received: from mail-oi1-f200.google.com (mail-oi1-f200.google.com [209.85.167.200]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4502BB for ; Sun, 5 Nov 2023 16:20:42 -0800 (PST) Received: by mail-oi1-f200.google.com with SMTP id 5614622812f47-3b3eba1fc32so6344143b6e.0 for ; Sun, 05 Nov 2023 16:20:42 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699230042; x=1699834842; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=CZQ78xmx/1eRfl04UsY8L//cVD5boCST8JLASCkpPAM=; b=t9C6hwN6R8q22+orByfisGve6zUH4hiJV6PHU/FLAUZ7UX7jYqWP4NELMgoGws4fBk BQRtkf4oorFqNeBrhQ+u3puwhyra+jxeOi/Qyj5/7/+TvaiSmg86E6EmQD5kZSbfVXyt f8ZA19HjdLMxUJaqZepdpSSmNqLgdIbXKn5CPwn6Jd9unHx5HumgsdYYku8OKfaT3VRj +3RKh4lpS8fF0gZxuHkNoU1XcRlK8XAKnspOUbUkPkg8N1TzDgsLmlJvl+V/J2f2gyN3 wuReokZzGMVi1kzaeG1+37gigbvwz67ctmePCa7bLazTJQu2OoEVF5Mv8acyVKRVjgCq EYig== X-Gm-Message-State: AOJu0Ywd6bkyu9lhW/9y9Ej0KmOnBbbtv2NiquHC0a49HmlvAXI01LmR cT+4jFTI6uh5pU7M6/ZpvljffYClvBQz36WpQajPckjnQFA1fiA= X-Google-Smtp-Source: AGHT+IHj57wW+sCPUol7vmw7gJAPCqNkuxKdYor7AN3c9KjaHJWT6sbIKpj+fHnGzz+gjX4B4+8drv8bJmx4YYugta1DJ3QY/o9u MIME-Version: 1.0 X-Received: by 2002:a05:6808:aaf:b0:3ae:2ba1:af6a with SMTP id r15-20020a0568080aaf00b003ae2ba1af6amr8868889oij.8.1699230042171; Sun, 05 Nov 2023 16:20:42 -0800 (PST) Date: Sun, 05 Nov 2023 16:20:42 -0800 In-Reply-To: <000000000000e7b62806096c7d67@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000e304b060970d3be@google.com> Subject: Re: [syzbot] [PATCH] null pointer dereference From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: [PATCH] null pointer dereference Author: yuran.pereira@hotmail.com #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master Signed-off-by: Yuran Pereira --- drivers/ptp/ptp_chardev.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c index 282cd7d24077..5b36c34629a0 100644 --- a/drivers/ptp/ptp_chardev.c +++ b/drivers/ptp/ptp_chardev.c @@ -173,6 +173,8 @@ long ptp_ioctl(struct posix_clock_context *pccontext, unsigned int cmd, int enable, err = 0; tsevq = pccontext->private_clkdata; + if (!tsevq) + return -EINVAL; switch (cmd) { -- 2.25.1