From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f71.google.com (mail-oo1-f71.google.com [209.85.161.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5966B38CFE8 for ; Sun, 13 Sep 2026 23:46:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789343198; cv=none; b=EtnrmP4xx/zpWpn4UF7o++Zz6GwYn7gGdWRQCbAUduLmpHi2O0b0DgK8xpa8gF+hF/RtIRMkf/BuK/UcKkMHhLE1H4/nrTD22kkrW3IG2ITFlFfxyRWMdK0p8gmGeMHxUiu6jMY+M5hO6fvIcguj4IdYc6LGs7rh5LL+RDMqVpI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789343198; c=relaxed/simple; bh=Qn9lIkgmGdmg09kU+H9Bzm5YtdGfa5a/RA3U99GBCpk=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=TDPtb0D0tQHSUyDVDjDwtGoHY+dDy2j2OGaRmUQ0HSneLBVvPcAjlHrL54pcZyd/ldqfYPmsLfZgoOqA2L42/dz/Z5ysFhXyXSIcF2N1sKnLQwj0lTl88RSqv+Mdd3J8ZUmkQU9+6qLi0F153OUHKrxrwYqRU5KxrNQhVdx8144= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.161.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oo1-f71.google.com with SMTP id 006d021491bc7-6b352d9062fso3483818eaf.3 for ; Sun, 13 Sep 2026 16:46:37 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1789343196; x=1789947996; h=content-type:cc:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=cjOiu+m9w1SzNUGZg72zZnORRd0gFlaMH0tXwn0wV5g=; b=EVp0jpScH77+dFouiCEad2ADV/B+SdsASwfHzbrzOMT0FxwnI3EToz5ncbT/KDJy81 Z/qQzkMUmUAG9kFN5HsFqPd1d/1k/ZY5g7UxajoJbgX1J1rUdbOkTGBAZhf2TSx0dV8h re+mEdRRoKolF16plGFCJ93AaUMSjjdq2oOJUWxyxsViiHBsPNr3SOZSwlyaf8cJWafF z9W/H/rSV2rZaeVbqhm1p3aGwuha3hm21SyV+eN5+IFzewZ3UK9RiHrDUuC/ZYfbybsR 1HA5lnWsoB/2/eCHLG1HcUFj2XoknluYEqw5F8xTU8RucPZC1mC3X0IFR5f6LtcT59Ji BOvQ== X-Forwarded-Encrypted: i=1; AKwUvBy483/F/EGzRvPOIC/xYa6hkmrJFUirTVkaVyRgO0uBxqj3X82+BqpB4A7/Z3v12x3nqms473d+rfH/Bt8=@vger.kernel.org X-Gm-Message-State: AFuF++mUQEQbLTDOBKHrHY0ejr2LuaSSuVXf/TkLe9l1AtSLLcde5OuI 2RDRe1Df7rN84TmUfjLywRHxjznutb7cMc602L+sz+jqllZEPSnBBgW7zjlWTzclyIBFwC+ZWHV ye60IM8qorDmhurgZSrOiiWwR6U8i7ix78OT7J8AyvTY5E23Wnrt+Ol+xR48= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:e842:0:b0:6bd:e592:2c66 with SMTP id 006d021491bc7-6c544cac0demr5509eaf.46.1789343196358; Sun, 13 Sep 2026 16:46:36 -0700 (PDT) Date: Sun, 13 Sep 2026 16:46:36 -0700 In-Reply-To: <20260913234627.465492-1-aadityakansal390@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aa735dc.3aa11909.1a03b8.0004.GAE@google.com> Subject: Re: [PATCH] md: add max_disks bound check in older version From: syzbot To: aadityakansal390@gmail.com Cc: aadityakansal390@gmail.com, linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" > #syz test "" does not look like a valid git branch or commit. > > diff --git a/drivers/md/md.c b/drivers/md/md.c > index 680b34a63cb3..f5fce41637f1 100644 > --- a/drivers/md/md.c > +++ b/drivers/md/md.c > @@ -1693,6 +1693,12 @@ static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) > desc_nr = rdev2->raid_disk; > else > desc_nr = next_spare++; > + > + if (desc_nr >= MD_SB_DISKS) { > + pr_warn("md: raid_disks = %d exceeds max_disks = %d for version 0.90\n", > + desc_nr, MD_SB_DISKS); > + continue; > + } > rdev2->desc_nr = desc_nr; > d = &sb->disks[rdev2->desc_nr]; > nr_disks++; > @@ -1722,7 +1728,7 @@ static void super_90_sync(struct mddev *mddev, struct md_rdev *rdev) > d->state |= (1< } > /* now set the "removed" and "faulty" bits on any missing devices */ > - for (i=0 ; i < mddev->raid_disks ; i++) { > + for (i = 0; i < mddev->raid_disks && i < MD_SB_DISKS; i++) { > mdp_disk_t *d = &sb->disks[i]; > if (d->state == 0 && d->number == 0) { > d->number = i; > -- > 2.55.0 >