From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) (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 A9F16139579 for ; Sat, 30 Nov 2024 19:55:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732996529; cv=none; b=FnuUeJAh5QEdLQMF7NSuSdBLqnYXqKCSYvho7Tm87HSjM9p4cjrD+iwVnFRnXziIKHHsf743xXg0uULeqWU/UTQIuYTecXK29RIJQWAEf0MGX+M5QgGxTkGcEm/yVjqy09ULHRFoJY51kqsuDAiRfPmw0v8bq4jc5H/a2QIS5fE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732996529; c=relaxed/simple; bh=8Xb8dc5W1OVfb4SyUJ2sRpNQaZyUdnqMowgn3Luzl1c=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=VbEWwgiDk91iG2zxwk1jgbaR8uzGCRqavGfK3oggVC7MyQueBQnPKU9YEDohVP2F4El/vFcULK+taEl4goUGP5LYG7W3O6Zek5WwSkLE09PSMdzEK5GGCFixyh23NAa0PogCHytlbkKorTI1gDyoo8gqgE8Y38VM6uaOCRWqIv4= 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=209.85.166.197 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-il1-f197.google.com with SMTP id e9e14a558f8ab-3a79afe7a0bso35570735ab.3 for ; Sat, 30 Nov 2024 11:55:27 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732996527; x=1733601327; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=R3MGNedngZW8LYXo//0pHRzhZsyCDjUrOn5DgJSX8jM=; b=bs//SQxoWIoxWigjtVtF8SlX15Mc1MRI/Vtf2jVyEhCNIdzgnQwdD0yEFXR9H54Fnq I8F5/dEoxV+nI9aYUZ3EN2/uW/8YgXVa+cinzQ/Oeof4qpKANLDcecm8kG0z4bOL+HSE XWvA4QVHIrpmRjNAJgC/cPYEvTooZXPJqshbl7QZvQa98l1qQySNR+5ZmmUNFXupHKkk Mje5f/QmEw008VDj02rXvsbethgt9mEvx2ondP12LtYW0UzPkN1h096so7LWtY7VN37+ XvYDxWQZm/HA2DJYEiO7lfnYM5sgWJpqX2bWqIgTZPlE8X07R8Lf7yg1TNGqdE2Pj3fi dY4A== X-Forwarded-Encrypted: i=1; AJvYcCUGYsEZHG6HQCMTbzMq9ulV0K3dD1DHwkl6zke1GMV1QlamGnTH7o95tVP0KGBCWyskzSgQlTbv8+TRurk=@vger.kernel.org X-Gm-Message-State: AOJu0YxChc97b+OdnkBCdxmNb9pkVMiYz5YMUtcd82apU0zq8mTUZdgT YC76Oxihfkso74tdm5u2ZEXq5VzAK07/Z/WU+u2GsdXql3kgRZ4/ftkLRoEGBnkPJ/y+1YpBSe3 ibEieIjTPpXMK+66DnoPhYjKN8LMeF2dUn4qlHpi82hLOnkUJwYzprMk= X-Google-Smtp-Source: AGHT+IGtS0xTjRJDW15NrnI0Fzbu8Q0S9T3o0mti+BpuGsWzTtdgiZSdrEG68YEB5Zsgw2tDwMnPYbWzuAZIcT4c7yJ4QQYOOoV/ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1786:b0:3a7:1bfc:97c6 with SMTP id e9e14a558f8ab-3a7c55d6862mr150481965ab.16.1732996526872; Sat, 30 Nov 2024 11:55:26 -0800 (PST) Date: Sat, 30 Nov 2024 11:55:26 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <674b6dae.050a0220.253251.00e3.GAE@google.com> Subject: [syzbot] [bcachefs?] KMSAN: uninit-value in bch2_dirent_validate From: syzbot To: kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 7af08b57bcb9 Merge tag 'trace-v6.13-2' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=167b4d30580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d66c9f9a88c492bd dashboard link: https://syzkaller.appspot.com/bug?extid=652199d534e8c0a1c0ac 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/9c3165413ea6/disk-7af08b57.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bdc591e3d285/vmlinux-7af08b57.xz kernel image: https://storage.googleapis.com/syzbot-assets/bef82d827bd2/bzImage-7af08b57.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+652199d534e8c0a1c0ac@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in bch2_dirent_name_bytes fs/bcachefs/dirent.c:27 [inline] BUG: KMSAN: uninit-value in bch2_dirent_get_name fs/bcachefs/dirent.c:37 [inline] BUG: KMSAN: uninit-value in bch2_dirent_validate+0x5ee/0xc30 fs/bcachefs/dirent.c:107 bch2_dirent_name_bytes fs/bcachefs/dirent.c:27 [inline] bch2_dirent_get_name fs/bcachefs/dirent.c:37 [inline] bch2_dirent_validate+0x5ee/0xc30 fs/bcachefs/dirent.c:107 bch2_bkey_val_validate+0x2b5/0x440 fs/bcachefs/bkey_methods.c:143 bset_key_validate fs/bcachefs/btree_io.c:841 [inline] validate_bset_keys+0x1531/0x2080 fs/bcachefs/btree_io.c:910 validate_bset_for_write+0x142/0x290 fs/bcachefs/btree_io.c:1942 __bch2_btree_node_write+0x53df/0x6830 fs/bcachefs/btree_io.c:2152 bch2_btree_node_write+0xa5/0x2e0 fs/bcachefs/btree_io.c:2284 btree_node_write_if_need fs/bcachefs/btree_io.h:151 [inline] __btree_node_flush+0x606/0x680 fs/bcachefs/btree_trans_commit.c:252 bch2_btree_node_flush1+0x38/0x60 fs/bcachefs/btree_trans_commit.c:266 journal_flush_pins+0xce6/0x1780 fs/bcachefs/journal_reclaim.c:565 __bch2_journal_reclaim+0xda8/0x1670 fs/bcachefs/journal_reclaim.c:698 bch2_journal_reclaim_thread+0x18e/0x760 fs/bcachefs/journal_reclaim.c:740 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_u64s_small fs/bcachefs/util.h:393 [inline] bkey_p_copy fs/bcachefs/bkey.h:47 [inline] bch2_sort_keys_keep_unwritten_whiteouts+0x12d5/0x19d0 fs/bcachefs/bkey_sort.c:187 __bch2_btree_node_write+0x3ae8/0x6830 fs/bcachefs/btree_io.c:2095 bch2_btree_node_write+0xa5/0x2e0 fs/bcachefs/btree_io.c:2284 btree_node_write_if_need fs/bcachefs/btree_io.h:151 [inline] __btree_node_flush+0x606/0x680 fs/bcachefs/btree_trans_commit.c:252 bch2_btree_node_flush1+0x38/0x60 fs/bcachefs/btree_trans_commit.c:266 journal_flush_pins+0xce6/0x1780 fs/bcachefs/journal_reclaim.c:565 __bch2_journal_reclaim+0xda8/0x1670 fs/bcachefs/journal_reclaim.c:698 bch2_journal_reclaim_thread+0x18e/0x760 fs/bcachefs/journal_reclaim.c:740 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 created at: ___kmalloc_large_node+0x22c/0x370 mm/slub.c:4238 __kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4255 __do_kmalloc_node mm/slub.c:4271 [inline] __kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4289 __kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:650 btree_bounce_alloc fs/bcachefs/btree_io.c:124 [inline] btree_node_sort+0x78a/0x1d30 fs/bcachefs/btree_io.c:323 bch2_btree_post_write_cleanup+0x1b0/0xf20 fs/bcachefs/btree_io.c:2248 bch2_btree_node_write+0x21c/0x2e0 fs/bcachefs/btree_io.c:2289 btree_node_write_if_need fs/bcachefs/btree_io.h:151 [inline] __btree_node_flush+0x606/0x680 fs/bcachefs/btree_trans_commit.c:252 bch2_btree_node_flush0+0x35/0x60 fs/bcachefs/btree_trans_commit.c:261 journal_flush_pins+0xce6/0x1780 fs/bcachefs/journal_reclaim.c:565 __bch2_journal_reclaim+0xda8/0x1670 fs/bcachefs/journal_reclaim.c:698 bch2_journal_reclaim_thread+0x18e/0x760 fs/bcachefs/journal_reclaim.c:740 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 CPU: 0 UID: 0 PID: 6699 Comm: bch-reclaim/loo Not tainted 6.12.0-syzkaller-10689-g7af08b57bcb9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup