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 X-Spam-Level: X-Spam-Status: No, score=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F095BC2BA2B for ; Sat, 11 Apr 2020 08:52:04 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BA87D206C0 for ; Sat, 11 Apr 2020 08:52:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BA87D206C0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 67F9F8E00A3; Sat, 11 Apr 2020 04:52:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 62F0A8E0007; Sat, 11 Apr 2020 04:52:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 543E88E00A3; Sat, 11 Apr 2020 04:52:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0208.hostedemail.com [216.40.44.208]) by kanga.kvack.org (Postfix) with ESMTP id 3A32C8E0007 for ; Sat, 11 Apr 2020 04:52:04 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id E1006180AD802 for ; Sat, 11 Apr 2020 08:52:03 +0000 (UTC) X-FDA: 76694956926.17.lunch83_11ff48946b65b X-HE-Tag: lunch83_11ff48946b65b X-Filterd-Recvd-Size: 3080 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) by imf09.hostedemail.com (Postfix) with ESMTP for ; Sat, 11 Apr 2020 08:52:03 +0000 (UTC) Received: by mail-il1-f197.google.com with SMTP id m2so4789744ilb.21 for ; Sat, 11 Apr 2020 01:52:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=qTINh29b/Yp/7SVCFmk8/NkoIg3EopMO0nTDlPRjtbI=; b=Usq9LFX2GXfajjUYl9iAw1i6gxhN3dpjVYtSK89dm4a5R+O5qBgsuaPpgA/WyRfb4k s5El3V6h4q4i1ks84SGBdifLSGuYFWXB9XnikVHi4OW77v/ZotXcxQTGgl95pGcwrz1U /Ukgcu8oN+enBdcf2YT3gVlSjsd5f4A4fZsbAjUfBFwzlc+YraQRFBKtyr+hD2iitkfB D5nz8yAVjtIP2wXF+QOvoJbQH9gI81rQb41wooiI369D/tAsMwhpDGeduC3QLioU5Oap fNG8pPTeThDR+bxN//FeMKGCiKvad60O+8vUSG0lr0q7cU+Bhwr6d0F+8y7z0l+SmCIu aOOA== X-Gm-Message-State: AGi0PuYZzpHDiVY0CMKS0ayaO96XugCPOMiwRg6dRmUyXNWVsub1LsYa YhjufWzpJ6pY3zJ0R4whI/h/h11fId/fwgwXqsIumtgCanuN X-Google-Smtp-Source: APiQypJFRmWFTlWYX4yEqUwZwWBorQJssSnDRNG2VNHqEipwwTeLuySk+MyV/DhdV/b7R+ZeE/WBQ+yQDOPU1DNnAGTi35gKpGmv MIME-Version: 1.0 X-Received: by 2002:a02:aa93:: with SMTP id u19mr7967615jai.70.1586595123042; Sat, 11 Apr 2020 01:52:03 -0700 (PDT) Date: Sat, 11 Apr 2020 01:52:03 -0700 In-Reply-To: <000000000000571acf05a229cb2f@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b61fcf05a2fff6ed@google.com> Subject: Re: possible deadlock in shmem_mfill_atomic_pte From: syzbot To: akpm@linux-foundation.org, hughd@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.org Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.014131, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: syzbot has bisected this bug to: commit 71725ed10c40696dc6bdccf8e225815dcef24dba Author: Hugh Dickins Date: Tue Apr 7 03:07:57 2020 +0000 mm: huge tmpfs: try to split_huge_page() when punching hole bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17c463e7e00000 start commit: ab6f762f printk: queue wake_up_klogd irq_work only if per-.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=142463e7e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=102463e7e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=3010ccb0f380f660 dashboard link: https://syzkaller.appspot.com/bug?extid=e27980339d305f2dbfd9 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12d3c5afe00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15e7f51be00000 Reported-by: syzbot+e27980339d305f2dbfd9@syzkaller.appspotmail.com Fixes: 71725ed10c40 ("mm: huge tmpfs: try to split_huge_page() when punching hole") For information about bisection process see: https://goo.gl/tpsmEJ#bisection