From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (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 9BFD81A2C03 for ; Thu, 1 Aug 2024 13:38:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722519486; cv=none; b=IvI5/YrVQDTihOhzbrt3/ypUVaWm+qxC/kuJbUW+B2FYhXNgaKKS3apHSxtSjwH3QRIxGCXjjPJ9XZdsPH93hbNdeDR9mXFMRQ3adkUM43o7tHCPr3iqjF4jLlrmaLP+PHG442auX/ssYzApRuvaQ+MWNZg18ncvt0ddGplOwfk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722519486; c=relaxed/simple; bh=46++KIrsEnYZcs0HLq8C2YF+vOwH7WgdlPb1A/2DPCo=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=X9SS7bxW/iH+zbZh+itdVhWCmDleUUthoCm5xtgZ+wGqcA+sBWTjczoxoLnvMYyIA/GruF7m2RPtOr1hmlDThT+f5H7wrL+Hv+NhPShH09Zs+LcsQQycQwa8ZJry5ZGyq5haaCtarI0FK6zKnnnhn+SIr52qtMJerc7HEFJ8kLQ= 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=209.85.166.70 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-f70.google.com with SMTP id ca18e2360f4ac-81f93601444so990675139f.2 for ; Thu, 01 Aug 2024 06:38:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722519483; x=1723124283; 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=Xa3daMPEc4UafLdYf5eErxcO2bh5GPkwwkty4AiZj8M=; b=vwflIMPk4EPwmfPrmsdVj5fRmEdz2psN6QBy3yWjG9kiXdDFigmHLHsScbPLMEy04o 0IjlxB5b63ERQiFSTBFHX0uzkO7MbDEMG8U0TUUj3FGzC0yRxQgI4glhT9aHBmdOUJPB CdyZ52V58NEHKebCzQ2RrPDSdgTWcKSoOpg0TQAhrcCIYFBOiABTrUq/FHt0a8Wzjy5X x1/jFVZvSGXjhEO5Fiw9yNZmYr7qefKmtmRhE2XnaXZpiSp6iB5KVh0vIf4pRxK2MBPc f//IWLpR4DOeT9uwQJI3Rl2M34LfrIfVkHcZFRFZCPVJ+FX/j9+YJx8XXJp0OuVmaavi 46Kg== X-Gm-Message-State: AOJu0YxuoMVNoL+38O1PNXdWRWHRQ8JBfmbW7Rv6cgQHgAK7Le9CL+ab 5DvLqQ55xmqN5VC4fmLPJOCHa1a2fCT31fe3/PhXLx1cssSRjRJ8oA0YiygDkxJ2NLG2a8VTv38 dDGx5JIFy2DObvEFAlpgUwXlXbNuy7brM+MDNdq5zTZktXwdb+dpZAkA= X-Google-Smtp-Source: AGHT+IHZdm+d5Lui3EPNuFWaGyZ/blBY4xW7XvDDD8RWtfyBVP6i507QgQX78cKv6DeGJ/+Ea+ux3nAOrgiAQDvk9MPLmk58FdUO Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1cae:b0:397:5d37:61fa with SMTP id e9e14a558f8ab-39b1fb79788mr105495ab.2.1722519483617; Thu, 01 Aug 2024 06:38:03 -0700 (PDT) Date: Thu, 01 Aug 2024 06:38:03 -0700 In-Reply-To: <20240801130611.3460940-1-lizhi.xu@windriver.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f0aac5061e9f5168@google.com> Subject: Re: [syzbot] [squashfs?] KMSAN: uninit-value in pick_link From: syzbot To: linux-kernel@vger.kernel.org, lizhi.xu@windriver.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KMSAN: uninit-value in pick_link loop0: detected capacity change from 0 to 8 err: 0, folio: ffffea0001294400, in: ffff888017408878, read_folio: ffffffff82fd66b0 do_read_cache_folio folio: ffffea0001294400, isize: -419430361, idx: 0, squashfs_symlink_read_folio error: 0, squashfs_symlink_read_folio err: 0, folio: ffffea0001294400, folio uptod: 1, do_read_cache_folio ===================================================== BUG: KMSAN: uninit-value in pick_link+0xd8c/0x1690 fs/namei.c:1850 pick_link+0xd8c/0x1690 fs/namei.c:1850 step_into+0x156f/0x1640 fs/namei.c:1909 open_last_lookups fs/namei.c:3674 [inline] path_openat+0x39da/0x6100 fs/namei.c:3883 do_filp_open+0x20e/0x590 fs/namei.c:3913 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1442 x64_sys_call+0x1fe/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4719 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2263 alloc_pages_noprof mm/mempolicy.c:2343 [inline] folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2350 filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1008 do_read_cache_folio+0x11e/0x1260 mm/filemap.c:3753 do_read_cache_page mm/filemap.c:3857 [inline] read_cache_page+0x63/0x1d0 mm/filemap.c:3866 read_mapping_page include/linux/pagemap.h:907 [inline] page_get_link+0x76/0xf90 fs/namei.c:5272 pick_link+0xd6c/0x1690 step_into+0x156f/0x1640 fs/namei.c:1909 open_last_lookups fs/namei.c:3674 [inline] path_openat+0x39da/0x6100 fs/namei.c:3883 do_filp_open+0x20e/0x590 fs/namei.c:3913 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1442 x64_sys_call+0x1fe/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 5944 Comm: syz.0.15 Not tainted 6.10.0-syzkaller-12708-g2f8c4f506285-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 ===================================================== Tested on: commit: 2f8c4f50 Merge tag 'auxdisplay-for-v6.11-tag1' of git:.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=126e41a1980000 kernel config: https://syzkaller.appspot.com/x/.config?x=ea3a063e5f96c3d6 dashboard link: https://syzkaller.appspot.com/bug?extid=24ac24ff58dc5b0d26b9 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=16a51be3980000