From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (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 D92DB6FBF for ; Thu, 7 Nov 2024 03:12:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730949164; cv=none; b=c3x55F8mZwM58eeK+CMwP96eICT90lBtwHFlLdC/5FSNGIth4S1MFwQIg4BSXWaE92zPCiaZf9AP6zp94dGeu4nGLfX3uSCBt0kTGuiTY9N8/p019Yt/gK5wWgcJdwbKGX8XuCvNgAo1gz5Xk6itQ5jHiBubnkYWAZvH/JmZtbE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730949164; c=relaxed/simple; bh=D37bF/2scRclf3FSOsaMsDYJWc0Ywnx39B3vicHl6k8=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=Old6TYvLHOMAjJQFP7MJWaQC7AAttFHzAsP1shvePh7DqE9mqKDvUAPcVJdlNKfeRp9yRpzIdVItIxtwM3yxNoMfyMWamxvRqOpi0uxxVrXUppK9sf5FoINzpNDDDg2VANoG3K0SkqLpXG3NdO38kjRZnU3ym0eZayG9JDaFmDY= 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=209.85.166.198 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-il1-f198.google.com with SMTP id e9e14a558f8ab-3a4e80ccd1bso5810405ab.2 for ; Wed, 06 Nov 2024 19:12:42 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730949162; x=1731553962; 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=qhyQHCMFSZukOAneSPf7ywClemnpBPt8X/xJgdHHAgA=; b=IdRGwXCfFdNBeRJHMQaSmrNMA1t0vyT06oSUGIq8OwsA7LJRqeYvanh/91Tf6vmYi6 k9HC7/+BW1FzyQd/0G3dZvrOTGSOAbfpDzIB6//jQnVie+h8L3s+oJPLjjHA+L39Yb5g FZxPGsB0f46J5xeEEoQbSGU3nStHo0Eq+6ogqDX/nNIQ5NhdK6QnZpfxqiTe2RZww9hd EGM1LObKbc+N+TDmuSI5+QOGldw+jFjAwLRyZJSIi32nptoRgXp2o7PE5fNNYvMlvFBA SAkJNMjnGm/RlcrNmSHeO48vBpgUlPm+kP5Kx+aRNwdzyLeWnwPe4nlTZC3VEYcT0qz6 7jwg== X-Gm-Message-State: AOJu0YxItywC+t0qAU2v9NIp3vhFnc2wXtYP9AgYDVpLmWAEpyxCS7+B mBkeujKO98yul8POZeb2o3gqSd3TRvkOmBqIpNzY3U2pDPOzzUqekl34f/IyrS1xBrIyyNUQx2z AhPfBTB35KQe/luGZxzNkTWhe0UscZ5z5/IkbwOamMpEwXsFG9EflkUU= X-Google-Smtp-Source: AGHT+IFe1nO8vR7o/pOAw89zU3uhhz+0drv9HD0FqcjPQi4mGeebTs5oVpsdsWwit695lrBIuJF0kTa/oiyA0pS+yM+p8FsW44pi Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:13a5:b0:3a4:e62b:4e20 with SMTP id e9e14a558f8ab-3a6b0281c6bmr219225165ab.9.1730949162079; Wed, 06 Nov 2024 19:12:42 -0800 (PST) Date: Wed, 06 Nov 2024 19:12:42 -0800 In-Reply-To: <672b7858.050a0220.350062.0256.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <672c302a.050a0220.49393.016f.GAE@google.com> Subject: Re: [syzbot] Re: [syzbot] [mm?] BUG: stack guard page was hit in v9fs_file_read_iter 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] [mm?] BUG: stack guard page was hit in v9fs_file_read_iter Author: lizhi.xu@windriver.com add resched to avoid retry too frequently when rreq need to retry #syz test diff --git a/fs/netfs/read_collect.c b/fs/netfs/read_collect.c index b18c65ba5580..079ba61e24d1 100644 --- a/fs/netfs/read_collect.c +++ b/fs/netfs/read_collect.c @@ -512,9 +512,13 @@ void netfs_read_subreq_terminated(struct netfs_io_subrequest *subreq, __set_bit(NETFS_SREQ_NEED_RETRY, &subreq->flags); __clear_bit(NETFS_SREQ_NO_PROGRESS, &subreq->flags); set_bit(NETFS_RREQ_NEED_RETRY, &rreq->flags); + if (!was_async) + cond_resched(); } else if (!__test_and_set_bit(NETFS_SREQ_NO_PROGRESS, &subreq->flags)) { __set_bit(NETFS_SREQ_NEED_RETRY, &subreq->flags); set_bit(NETFS_RREQ_NEED_RETRY, &rreq->flags); + if (!was_async) + cond_resched(); } else { __set_bit(NETFS_SREQ_FAILED, &subreq->flags); error = -ENODATA;