From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f80.google.com (mail-io1-f80.google.com [209.85.166.80]) (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 5972417571 for ; Fri, 7 Jun 2024 03:40:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717731629; cv=none; b=cPAokp+6yNA96hXn12ISfyQptm9AoqnA2NQar/SZmLErlIShaaXlMd0RY/xWgMAcZrCjpk8gg0cTxjhhs1KUBkDKqR0kKLoXYbyZhMJHo10QAoLRxmgOp6vfP43BQ17eUlyL0ADNgw+RtyMP8MJHpRQntulFQ93XgzuIn9XUF3w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717731629; c=relaxed/simple; bh=ATrdjV99vrwXnwpb8CC00otkfBEA3CF2mfwankEHGpw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=mAdEHIfudQLDheVfK+TZIzIXXgKSK1V+GtksWX3xOYBivyTnnGG7z0vleWLSZs5bjkWex4oW0OkwnGzv86f/jOPsODEdNiD66zso1Wzpr7Qe9QFxvlIXd1yhj3krUlgh4QkYh89Fhi2+CIFcvByf+6yup3uda1RUDlIoJLSutF4= 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=209.85.166.80 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-f80.google.com with SMTP id ca18e2360f4ac-7ea8fc6bd4dso187185839f.1 for ; Thu, 06 Jun 2024 20:40:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717731627; x=1718336427; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=5A0+kn72RG0NgBZDk5mNh7EkiTRFr9f/55CydiNHQa4=; b=jZiu7Bt/U+uFUcm7LcVsefI/zt2QoW7GZTlnh0nwJXbbyMHJ17c8f6cGCSOeGtaKnN 7ISOdWfcEltHMoHdNyjrvDXD4fnUlOcq7Q6QazURHtrH5pK1Ez9Nw5LGWZsnLDrCKq34 6lc03uPDl7HC9u2FI5LuhZEoaaCxb+hmUdpdZzyjYHBuNPQjIbqgkhTW6n3Nsay3b8op 9bomSWadOOe/xUUH/HR+d+SEZx0cw6JpmTZAXdW2um+tllgCPbLW8qsJxOc6PYipDiyj slNbi7eQn1yHlLfH8JCTuwX5k18ZH1cmXsDkpaUiook5RhGwdxFhsp2W5zPtbyjms2JC uaTw== X-Forwarded-Encrypted: i=1; AJvYcCVdXD8LU8b5+20yLy14Jpuf5mgj3OglVK3CWVsBSsdt5gO802N2ntCys9WpHMUs93u/QMGh0g5S5ZBACLtPFOvaKpntculMIPiweBm1 X-Gm-Message-State: AOJu0Yygf/axj9jzEyMpehGjq2/QDtznL7z0+io7ZubSVpk231UWsYeO cYEfOe5YlgpLrPDkIVbyOebJ7SyDHajQRcNfoN8RsT1nHO+kDRgL3ldmck41e+ew7vuqIo/DchS twMjOslsQ3DK7hs3rGUtI2+pN4/T9Kte3XyDB9OpINSzpmkUdNeKmRJE= X-Google-Smtp-Source: AGHT+IFEURiAsd73ZKaNCjv7mYXrXLr0nBqA1jHA5dci2Hby/ZpuEZlQAQxOYukcU459onYbAu4gwc3VlopXFFUfxNCSBLUQ+Pjv Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:2053:b0:488:59cc:eb4c with SMTP id 8926c6da1cb9f-4b7b16db4c1mr35511173.3.1717731627449; Thu, 06 Jun 2024 20:40:27 -0700 (PDT) Date: Thu, 06 Jun 2024 20:40:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000794dc0061a448fc0@google.com> Subject: [syzbot] [btrfs?] KMSAN: uninit-value in ZSTD_compressBlock_doubleFast From: syzbot To: clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, terrelln@fb.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 614da38e2f7a Merge tag 'hid-for-linus-2024051401' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=164aa5f2980000 kernel config: https://syzkaller.appspot.com/x/.config?x=f5d2cbf33633f507 dashboard link: https://syzkaller.appspot.com/bug?extid=c86c7974966b98aab23d compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/89eafb874b71/disk-614da38e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/356000512ad9/vmlinux-614da38e.xz kernel image: https://storage.googleapis.com/syzbot-assets/839c73939115/bzImage-614da38e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c86c7974966b98aab23d@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in ZSTD_count lib/zstd/compress/zstd_compress_internal.h:752 [inline] BUG: KMSAN: uninit-value in ZSTD_compressBlock_doubleFast_noDict_generic lib/zstd/compress/zstd_double_fast.c:143 [inline] BUG: KMSAN: uninit-value in ZSTD_compressBlock_doubleFast_noDict_4 lib/zstd/compress/zstd_double_fast.c:479 [inline] BUG: KMSAN: uninit-value in ZSTD_compressBlock_doubleFast+0xf04d/0x19160 lib/zstd/compress/zstd_double_fast.c:499 ZSTD_count lib/zstd/compress/zstd_compress_internal.h:752 [inline] ZSTD_compressBlock_doubleFast_noDict_generic lib/zstd/compress/zstd_double_fast.c:143 [inline] ZSTD_compressBlock_doubleFast_noDict_4 lib/zstd/compress/zstd_double_fast.c:479 [inline] ZSTD_compressBlock_doubleFast+0xf04d/0x19160 lib/zstd/compress/zstd_double_fast.c:499 ZSTD_buildSeqStore+0xc68/0xe00 lib/zstd/compress/zstd_compress.c:2796 ZSTD_compressBlock_internal+0x5c/0x8c0 lib/zstd/compress/zstd_compress.c:3688 ZSTD_compress_frameChunk lib/zstd/compress/zstd_compress.c:3887 [inline] ZSTD_compressContinue_internal+0x1ff3/0x5560 lib/zstd/compress/zstd_compress.c:4062 ZSTD_compressEnd+0x69/0x960 lib/zstd/compress/zstd_compress.c:4545 ZSTD_compressStream_generic lib/zstd/compress/zstd_compress.c:5294 [inline] ZSTD_compressStream2+0x1380/0x2770 lib/zstd/compress/zstd_compress.c:5501 ZSTD_endStream+0x6e/0x270 lib/zstd/compress/zstd_compress.c:5970 zstd_end_stream+0x36/0x50 lib/zstd/zstd_compress_module.c:159 zstd_compress_pages+0x1381/0x1ef0 fs/btrfs/zstd.c:494 compression_compress_pages fs/btrfs/compression.c:105 [inline] btrfs_compress_pages+0x34e/0x460 fs/btrfs/compression.c:1010 compress_file_range+0xf50/0x25d0 fs/btrfs/inode.c:948 btrfs_work_helper+0x52f/0x18d0 fs/btrfs/async-thread.c:314 process_one_work kernel/workqueue.c:3267 [inline] process_scheduled_works+0xa81/0x1bd0 kernel/workqueue.c:3348 worker_thread+0xea5/0x1560 kernel/workqueue.c:3429 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was stored to memory at: ZSTD_limitCopy lib/zstd/compress/../common/zstd_internal.h:251 [inline] ZSTD_compressStream_generic lib/zstd/compress/zstd_compress.c:5261 [inline] ZSTD_compressStream2+0xd3f/0x2770 lib/zstd/compress/zstd_compress.c:5501 ZSTD_compressStream+0x42/0x180 lib/zstd/compress/zstd_compress.c:5384 zstd_compress_stream+0x3e/0x50 lib/zstd/zstd_compress_module.c:147 zstd_compress_pages+0xed6/0x1ef0 fs/btrfs/zstd.c:428 compression_compress_pages fs/btrfs/compression.c:105 [inline] btrfs_compress_pages+0x34e/0x460 fs/btrfs/compression.c:1010 compress_file_range+0xf50/0x25d0 fs/btrfs/inode.c:948 btrfs_work_helper+0x52f/0x18d0 fs/btrfs/async-thread.c:314 process_one_work kernel/workqueue.c:3267 [inline] process_scheduled_works+0xa81/0x1bd0 kernel/workqueue.c:3348 worker_thread+0xea5/0x1560 kernel/workqueue.c:3429 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was stored to memory at: memcpy_from_iter lib/iov_iter.c:73 [inline] iterate_bvec include/linux/iov_iter.h:122 [inline] iterate_and_advance2 include/linux/iov_iter.h:249 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] __copy_from_iter lib/iov_iter.c:249 [inline] copy_page_from_iter_atomic+0x12b7/0x2ae0 lib/iov_iter.c:481 btrfs_copy_from_user+0x176/0x4c0 fs/btrfs/file.c:59 btrfs_buffered_write+0x119a/0x2ab0 fs/btrfs/file.c:1339 btrfs_do_write_iter+0x395/0x2270 fs/btrfs/file.c:1688 btrfs_file_write_iter+0x38/0x50 fs/btrfs/file.c:1705 __kernel_write_iter+0x64d/0xc80 fs/read_write.c:523 dump_emit_page fs/coredump.c:895 [inline] dump_user_range+0x8dc/0xee0 fs/coredump.c:956 elf_core_dump+0x57c7/0x5ae0 fs/binfmt_elf.c:2083 do_coredump+0x32d5/0x4920 fs/coredump.c:769 get_signal+0x267e/0x2d00 kernel/signal.c:2896 arch_do_signal_or_restart+0x53/0xcb0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x5d/0x160 kernel/entry/common.c:218 do_syscall_64+0xdc/0x1e0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598 alloc_pages_mpol+0x299/0x990 mm/mempolicy.c:2264 alloc_pages+0x1bf/0x1e0 mm/mempolicy.c:2335 dump_user_range+0x4a/0xee0 fs/coredump.c:940 elf_core_dump+0x57c7/0x5ae0 fs/binfmt_elf.c:2083 do_coredump+0x32d5/0x4920 fs/coredump.c:769 get_signal+0x267e/0x2d00 kernel/signal.c:2896 arch_do_signal_or_restart+0x53/0xcb0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x5d/0x160 kernel/entry/common.c:218 do_syscall_64+0xdc/0x1e0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 PID: 3475 Comm: kworker/u8:18 Not tainted 6.9.0-syzkaller-02707-g614da38e2f7a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: btrfs-delalloc btrfs_work_helper ===================================================== --- This report is generated by a bot. 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