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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id D3992CEB2CB for ; Mon, 30 Sep 2024 23:52:46 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3D8A228003E; Mon, 30 Sep 2024 19:52:46 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 389CF280036; Mon, 30 Sep 2024 19:52:46 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 250A528003E; Mon, 30 Sep 2024 19:52:46 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 0078C280036 for ; Mon, 30 Sep 2024 19:52:45 -0400 (EDT) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 71385AC1B3 for ; Mon, 30 Sep 2024 23:52:45 +0000 (UTC) X-FDA: 82623057090.11.520FF9D Received: from mail-lf1-f46.google.com (mail-lf1-f46.google.com [209.85.167.46]) by imf13.hostedemail.com (Postfix) with ESMTP id 95EDD20003 for ; Mon, 30 Sep 2024 23:52:43 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=gmail.com header.s=20230601 header.b=aKd5X1gn; spf=pass (imf13.hostedemail.com: domain of ebpqwerty472123@gmail.com designates 209.85.167.46 as permitted sender) smtp.mailfrom=ebpqwerty472123@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1727740299; a=rsa-sha256; cv=none; b=Wu/jVurkEtyEkconXPFOHYEe6fJRPauVsYZq+/SnQyqiWpxvmlbMdgvpwYNxxpJoZEkkpX nwJ8KOSKscJxgEojicGatViwYuQ3KEV/XIUwQG5rm20nVmHKirJY02aKV6bwH2aYXodekv xY8s2TQzQfXT/v0k40IMboZGhPIe1xM= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=gmail.com header.s=20230601 header.b=aKd5X1gn; spf=pass (imf13.hostedemail.com: domain of ebpqwerty472123@gmail.com designates 209.85.167.46 as permitted sender) smtp.mailfrom=ebpqwerty472123@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1727740299; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=ekER+BlavVK8e8lSCl9Lzc6p/rOexUYi5x/FegHKg2c=; b=P76mHgphbCAyqIWU+ac3gYvWb3lwMAxwJnkkVVYToM3tOvJRb/N9wKNN1O6wq37Okw3QOV QLKzo3ZE6g+cVI+xKciZwuZoyV68unFvdlVKO9kDoTbVKngwt2BhVbp4IoHzbNW3ovN2jf amcKxWr5MJJEEyg2RRrnYhFv9BjQLzw= Received: by mail-lf1-f46.google.com with SMTP id 2adb3069b0e04-5398e58ceebso2060698e87.0 for ; Mon, 30 Sep 2024 16:52:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1727740362; x=1728345162; darn=kvack.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=ekER+BlavVK8e8lSCl9Lzc6p/rOexUYi5x/FegHKg2c=; b=aKd5X1gnoHS9+UALnlBI27BG36qJTKKHSX3IKSTgJU6kaGGpnZsBmaFAO85rANQCul F2HBfihqpkLf8vj73cZX0b3NskT9NS3dm5MPKcPInhnEqmDLk6WSgJuoK8WNefU7h4px YQUfAzv5j62/nb8lSd4gbFuua2U5ulIUwZKQnhxW/pH27WFXj4qZnVm4vzkoAM008eWF pamGX7rDltALH9hYqVm2EgK/iYUHKXlfTEFPJRkRKZ/OxXsiXyW3jzWpR5WiyyUD7XMF W+AhklFOadBt+iZkKTd1YVMKOFQUk4MwVU7PnFXDPLMHEFpKavlSxzE1Nmd7UwpgDj2e RxMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727740362; x=1728345162; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ekER+BlavVK8e8lSCl9Lzc6p/rOexUYi5x/FegHKg2c=; b=DhpFFS6nnyDVadS2M+BlxrGbl9xGhgHsfHVnhf7bjutwL/zFezdNzTjgI1iCBPvESa 1l5w7ApK1cUp7moCLa31ANX2hKK79YYHHRRtew9s++dX1xQE+qVRXrluyTmPikKNB0ju TH6Jc7+ds2rx61R1IEuoHu02m/mDhgcQiv2KjaJJVUgDvASNVqFMtlykof+EfQYYxr/+ XXRgCQtftsFocBpXPv+zitbnVoePXf+XQGmB5SQM30R2D/9vZ/DSvZqjracUwC1+Cu7+ 1OpvYyivLRhqEVlUC9mIRGqwGxlLyQXK+iN0Ejjd0DNEBDonc5TIdPkIUMGdhTIoyT67 oGyg== X-Forwarded-Encrypted: i=1; AJvYcCV1wqVeuCvpU8md4EXtkhrPe7W3WTenzmUPN2y33oF8hy41kl1FnW+/3OHR9x1iFKJ6BVPvES5CEg==@kvack.org X-Gm-Message-State: AOJu0YyH34vtsTfw0t+WLP6A9EZRrRVqwxqkfw1AmMgNacrKByYCRytb 2Lbjl/IBymoedLMsokv+B+cRv2I7rwsr7Bnyp9JoXrCM+8ZKDVqbfuAF3Q3ij5xrBvCkUKtdoq4 zREg0BqeiDeTNxxWDTO6/toVx0BA= X-Google-Smtp-Source: AGHT+IGYS01WINA5gr1bRtsyxPngVbeEaeTYygCIoc+XhMsXVkXE2hkSm3g+SgpdWpx1vLyRpRargUgPtLBuk2FDJOY= X-Received: by 2002:a05:6512:6c4:b0:52e:fa78:63c0 with SMTP id 2adb3069b0e04-5399a24ff2dmr379518e87.13.1727740361446; Mon, 30 Sep 2024 16:52:41 -0700 (PDT) MIME-Version: 1.0 References: <66f7b3a0.050a0220.46d20.0038.GAE@google.com> <66fa4a57.050a0220.aab67.0027.GAE@google.com> In-Reply-To: <66fa4a57.050a0220.aab67.0027.GAE@google.com> From: Shu Han Date: Tue, 1 Oct 2024 07:52:27 +0800 Message-ID: Subject: Re: [syzbot] [mm?] possible deadlock in shmem_file_write_iter To: syzbot Cc: akpm@linux-foundation.org, hughd@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, paul@paul-moore.com, stephen.smalley.work@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Stat-Signature: wtaquf8reqcf7xciemrd8xd1pgsgerwj X-Rspamd-Queue-Id: 95EDD20003 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1727740363-290743 X-HE-Meta: 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 8Gp5KniH 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 OUZ/UQ7q Z4F8h60TZ8qYWzDXhJaGm8OToY1e8nhg X-Bogosity: Ham, tests=bogofilter, spamicity=0.000021, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: It seems to be the same as [1]. Link: https://lore.kernel.org/lkml/20240928065620.7abadb2d8552f03d785c77c9@= linux-foundation.org/ [1] syzbot =E4=BA=8E2024=E5=B9=B49=E6=9C=8830=E6=97=A5=E5=91=A8=E4=B8=80 14:51=E5=86= =99=E9=81=93=EF=BC=9A > > syzbot has bisected this issue to: > > commit ea7e2d5e49c05e5db1922387b09ca74aa40f46e2 > Author: Shu Han > Date: Tue Sep 17 09:41:04 2024 +0000 > > mm: call the security_mmap_file() LSM hook in remap_file_pages() > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=3D110d4ea998= 0000 > start commit: 3efc57369a0c Merge tag 'for-linus' of git://git.kernel.or= g.. > git tree: upstream > final oops: https://syzkaller.appspot.com/x/report.txt?x=3D130d4ea998= 0000 > console output: https://syzkaller.appspot.com/x/log.txt?x=3D150d4ea998000= 0 > kernel config: https://syzkaller.appspot.com/x/.config?x=3Da4fcb065287cd= b84 > dashboard link: https://syzkaller.appspot.com/bug?extid=3D288aa6838b3263f= 52e7e > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=3D17af2980580= 000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=3D11607d9f98000= 0 > > Reported-by: syzbot+288aa6838b3263f52e7e@syzkaller.appspotmail.com > Fixes: ea7e2d5e49c0 ("mm: call the security_mmap_file() LSM hook in remap= _file_pages()") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisect= ion