From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (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 97F5228F3 for ; Mon, 17 Feb 2025 07:26:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739777202; cv=none; b=hlkhRYCoB6kVHxtO00rjP338Mw8gKX3prl0MC2QjAEf/BV0izvPl3lbTqlVOtrt7dNVh8y7XO5bfmRLkDJNo2kAdpe1hKj6XAzwMVPp2CCLgiSq1cu56IBclSp5qxztEtuGM0sGFWD7AajbpeOJxqFSGDKIZ1n+kau2GSPnYcr4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739777202; c=relaxed/simple; bh=p6IogSxJMzRt04vV8WEvg3QYM/jPUP2xTVyCkIAYnQc=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=Pw3o5ioViQ+fVcubX0lWtrcI1Y++Q7zgAsDmcuk36S/t+2HINDjEiNQN12bbfwY8yb3YF2c6AD1+oaL60MQSwxoX65Vmk4dloN+YbtNoBB6raezTMStvop7nSI0iyuyzF1m3kYTW3S1ox+wwAQCQqhO7aZ3kYxSW4sM5bgM4Z1E= 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=209.85.166.71 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-io1-f71.google.com with SMTP id ca18e2360f4ac-851f02bbfd8so292919739f.2 for ; Sun, 16 Feb 2025 23:26:40 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739777199; x=1740381999; 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=lqM3qi++a/dlK0DdkRmmZqC3xS0T6sYgA9Ehf2NVKdY=; b=MPMwBHASuxWO1bZcZakatNCDSiGv4pYI/dkf9IaXubPFgQsQbOPM9UJtXbu30Lo4Mn Z4S3Pbk8+ND6/5WEF5K5MutfMqHMb/xmSLMLGwUWEyNceanRcvF+a6WxyDGxEuzth09Y Dio31mJ4ntV8vtDD6IA447fpiAb8GFCCYgqE6HAzvuhCdEqPX1wGNt/BFI0vSMJpKENX uqSNamzwYv/so9eJlk6x4bnbgaeDhzIlNXfB6kC0P5hwDRl3D264vHncEmj4JC9zKzpv +gEKujtBILQ+aX6xKENp8qkhZj7j/L3YQNd3GlnbTbMEccpfi082lWCVwwHUEMm5Fl5L 2mQw== X-Gm-Message-State: AOJu0Yz0KdTjQ7CsuPOuDjjdvkG5xevbfdjXhJfD2Ml3zc8u2yhQugh0 LC3xsciC09Y9kDZ5EVuJ1Dbgd6MFqbHfCDonYuKZfsl+82rF6vvm5YLPOcDXuNPIhQAMcFpEaOq 3iEm135llNmEUbkdaRwO56SBrRQsoYOZoBfGekrVQCWq9psI0R46FWyU= X-Google-Smtp-Source: AGHT+IFY2vebmAcATuQk6oRVBW1yHM9hZZRcU0kMeUTmlW6EIwpv9erjyRWDVV3peNKX63jZAdWDL3DBOLDQpa2BbSis1KdG2qIF Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a29:b0:3d0:1633:3138 with SMTP id e9e14a558f8ab-3d28076e4e2mr75410505ab.1.1739777199752; Sun, 16 Feb 2025 23:26:39 -0800 (PST) Date: Sun, 16 Feb 2025 23:26:39 -0800 In-Reply-To: <67917ed8.050a0220.15cac.02eb.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67b2e4af.050a0220.54b41.000e.GAE@google.com> Subject: Re: [syzbot] Re: [syzbot] [fs?] BUG: corrupted list in remove_wait_queue (2) From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: Re: [syzbot] [fs?] BUG: corrupted list in remove_wait_queue (2) Author: lizhi.xu@windriver.com #syz test diff --git a/fs/select.c b/fs/select.c index 7da531b1cf6b..63dd2fb58447 100644 --- a/fs/select.c +++ b/fs/select.c @@ -977,6 +977,7 @@ static int do_sys_poll(struct pollfd __user *ufds, unsigned int nfds, struct poll_list *walk = head; unsigned int todo = nfds; unsigned int len; + static DEFINE_MUTEX(syspoll_lock); if (nfds > rlimit(RLIMIT_NOFILE)) return -EINVAL; @@ -1005,9 +1006,11 @@ static int do_sys_poll(struct pollfd __user *ufds, unsigned int nfds, } } + mutex_lock(&syspoll_lock); poll_initwait(&table); fdcount = do_poll(head, &table, end_time); poll_freewait(&table); + mutex_unlock(&syspoll_lock); if (!user_write_access_begin(ufds, nfds * sizeof(*ufds))) goto out_fds;