From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) (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 351A0DF4C for ; Thu, 28 Dec 2023 14:51:03 +0000 (UTC) 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-f69.google.com with SMTP id ca18e2360f4ac-7b7ce620dd9so1103436239f.1 for ; Thu, 28 Dec 2023 06:51:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703775063; x=1704379863; 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=PG9LUGF9Vse+PguLP1b4EV9x4i5dkt3ZXA90EInzl38=; b=FgIj0t6/uteZtOnmYMhuWT43BDwJ1aPoQFKEyQV2MoiTGUl445Hf6CdtdDvpiXtFXo WfQ9XzW7UUFqrR4nTpp06I0D8FHAlx4/rw61v7UKrCQb/LQuCaEmtcXtUdQS5VVaz2+P wk83cAAjQA5veF+w+sJzxgMq+ODm6kVUzCbd+/O4eNSILYZRNy7GHNdieWxqH31zJPp4 mZpzhPZ1RMZ6IgnF1jNakgDE2WTfkQ9mcazPRxQiPjlc46U+31KPKFlIh6Z7NUAi3VQj h6bKm+frdNMF3JQAaNfQSVAs51a4aYyg5FSwJyeEnIBCjC95RXV08eNa5KiRuJJOgCZk VN1w== X-Gm-Message-State: AOJu0Yz1Zv9vnS2hwYHQLlL07ZgOKQDXIFCNmdEjlc52j16hvexrUesu HNjgSFsWp6phvGJ/yHY6RpEU6geV+afssiCl0bcLoqtJGmNR X-Google-Smtp-Source: AGHT+IED0iWN/rYTDTrwY/tVmEFKbZhyd6/YjL5LCGhaZsuLn7eDxaTx8TbFRWT7p6ZSGA4PyM9OAENEGa7Q+O6ybTerRCaMfrbF Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a2d:b0:35f:f683:f817 with SMTP id g13-20020a056e021a2d00b0035ff683f817mr981073ile.5.1703775063387; Thu, 28 Dec 2023 06:51:03 -0800 (PST) Date: Thu, 28 Dec 2023 06:51:03 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006e3966060d930b7c@google.com> Subject: Re: [syzbot] [hfs?] KMSAN: uninit-value in __hfsplus_ext_cache_extent From: syzbot To: eadavis@qq.com, linux-kernel@vger.kernel.org, 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 __hfsplus_ext_cache_extent loop0: detected capacity change from 0 to 1024 ===================================================== BUG: KMSAN: uninit-value in __hfsplus_ext_read_extent fs/hfsplus/extents.c:170 [inline] BUG: KMSAN: uninit-value in __hfsplus_ext_cache_extent+0x851/0x960 fs/hfsplus/extents.c:191 __hfsplus_ext_read_extent fs/hfsplus/extents.c:170 [inline] __hfsplus_ext_cache_extent+0x851/0x960 fs/hfsplus/extents.c:191 hfsplus_file_truncate+0x730/0xf50 fs/hfsplus/extents.c:598 hfsplus_write_failed+0xab/0x100 fs/hfsplus/inode.c:42 hfsplus_write_begin+0x12e/0x130 fs/hfsplus/inode.c:56 generic_perform_write+0x3f5/0xc40 mm/filemap.c:3918 __generic_file_write_iter+0x20a/0x460 mm/filemap.c:4013 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4039 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x1490 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Local variable fd created at: hfsplus_file_truncate+0x5d/0xf50 fs/hfsplus/extents.c:547 hfsplus_write_failed+0xab/0x100 fs/hfsplus/inode.c:42 CPU: 0 PID: 5485 Comm: syz-executor.0 Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ===================================================== Tested on: commit: fbafc3e6 Merge tag 'for_linus' of git://git.kernel.org.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=16e5645ee80000 kernel config: https://syzkaller.appspot.com/x/.config?x=e0c7078a6b901aa3 dashboard link: https://syzkaller.appspot.com/bug?extid=55ad87f38795d6787521 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=129e0a91e80000