From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 5C41414C5B0 for ; Sat, 11 Jan 2025 13:37:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736602648; cv=none; b=Mnyvi8Mgskc9dpsps08hk8awwlyASrJBbw1CM9xVSCS6swAMtVnufczno1fnIOMpqLTuyC5t5KpPsw9WDnezDAvss4HUun5BUnpfhVuR86rD9Mo2at0lLNnD1sO15tMJHuPOZsJ7KZH4Bi6BBBdpnyuI/AlRsdBcnfYnLf2ho5w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736602648; c=relaxed/simple; bh=KBsS/iBKicCVO72r9pDHtNMFaoLi0MNZab7kWaeabPM=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=PJkZPLxYj0i+hQwHOeJVuDiHE44dEXrE6a88N6Ce1UA0fI7+l+w/SkI6wGGIuIpwf7puxp/izV2g1eDHHRL8OSouiNug4BxmZkbsDP+cpNeTerxnmoV/4w6RIz1onBuf3wF6SbGfB73luAsxBHu/gaPEAdEb3u9FoSq/bNqpL1U= 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=209.85.166.208 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-f208.google.com with SMTP id e9e14a558f8ab-3ce66ad2dbaso3082205ab.0 for ; Sat, 11 Jan 2025 05:37:27 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1736602646; x=1737207446; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=fuyObhNJkilb1hXrzNwP6Vi4du6OQOdpxz1m1hwIllI=; b=tfer+UX05NOzuIBQiFiPcf1XFEkpI9baAD5JnPb8JUQ4oMWvYPn/TQDSCHWe7VvaJd XrjWeyo9hgWdAaGzvpFXU14435z46MzDdD2zw1sDmzCrfQAlBpi7E7v2/T/g9lPVjpQ0 IVsf5lC9MHTcI/v1QHa2SVfLBY5NGiHhoxEPiK72Txnjz9AekgO5vmX1kWCtX/1vXjNx C8SojsnkuIp1FHxwOEdVcXagoD1Uyv9TLfDWk5u/BNL681dQQ8z+XW3ST/5+0gVleK6I 2Jn3KePjxjOd6WhA6WJH7QOPAxKS6lNdvMDSTvJAlN0IeBJ0pTHCbvJtG6HPcRVi9RBX s48g== X-Forwarded-Encrypted: i=1; AJvYcCVmjiJ4PEdIW7xGdqwSE/Mj2GQncqLd9IqI/w+x3g0sek7H+nDrC0txv3P47zyr5btFC24kd1YnfRw47Ck=@vger.kernel.org X-Gm-Message-State: AOJu0Yx9+r36SWwbARFXsPu7EjwNXW7D3eIRctRWDJjcUJVubBfxT9a1 mQs4YLiHYr74qW651Dtn7/RwZG6YvZChsovdytxlg2J6646RoQLzL38qn7d6HYOnPDg7rlqtSUR chy2gev18Y/Tn6wxU2TN8UUjB6ghY0dmhzMy39jQ87bkm6ddY0360jas= X-Google-Smtp-Source: AGHT+IHjiih4refK4THP+qamKiiUSq5Cq++/BMeZNO0xl9YxcaYqCCVFcUMgIoQBmMU7qrFQaGm05SbQhyuG/9/ucsW9nWZw5KuB Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c8e:b0:3ce:3016:fbc3 with SMTP id e9e14a558f8ab-3ce3a8882c6mr101975035ab.14.1736602646535; Sat, 11 Jan 2025 05:37:26 -0800 (PST) Date: Sat, 11 Jan 2025 05:37:26 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67827416.050a0220.216c54.0020.GAE@google.com> Subject: [syzbot] [bcachefs?] KMSAN: uninit-value in bch2_readdir (2) 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: fbfd64d25c7a Merge tag 'vfs-6.13-rc7.fixes' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=125755c4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=93fafdd434f3247d dashboard link: https://syzkaller.appspot.com/bug?extid=a7b475122da841580575 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/be5f7d21fc6d/disk-fbfd64d2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/18656986c542/vmlinux-fbfd64d2.xz kernel image: https://storage.googleapis.com/syzbot-assets/23240d42568c/bzImage-fbfd64d2.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a7b475122da841580575@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in bch2_dirent_read_target fs/bcachefs/dirent.c:259 [inline] BUG: KMSAN: uninit-value in bch2_readdir+0x1a45/0x2470 fs/bcachefs/dirent.c:551 bch2_dirent_read_target fs/bcachefs/dirent.c:259 [inline] bch2_readdir+0x1a45/0x2470 fs/bcachefs/dirent.c:551 bch2_vfs_readdir+0x347/0x7c0 fs/bcachefs/fs.c:1377 iterate_dir+0x5b3/0x9e0 fs/readdir.c:108 __do_sys_getdents fs/readdir.c:322 [inline] __se_sys_getdents+0x170/0x550 fs/readdir.c:308 __x64_sys_getdents+0x96/0xe0 fs/readdir.c:308 x64_sys_call+0x38d8/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:79 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 stored to memory at: memcpy_u64s_small fs/bcachefs/util.h:393 [inline] bkey_reassemble fs/bcachefs/bkey.h:513 [inline] bch2_bkey_buf_reassemble fs/bcachefs/bkey_buf.h:28 [inline] bch2_readdir+0x14f7/0x2470 fs/bcachefs/dirent.c:551 bch2_vfs_readdir+0x347/0x7c0 fs/bcachefs/fs.c:1377 iterate_dir+0x5b3/0x9e0 fs/readdir.c:108 __do_sys_getdents fs/readdir.c:322 [inline] __se_sys_getdents+0x170/0x550 fs/readdir.c:308 __x64_sys_getdents+0x96/0xe0 fs/readdir.c:308 x64_sys_call+0x38d8/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:79 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: ___kmalloc_large_node+0x22c/0x370 mm/slub.c:4253 __kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4270 __do_kmalloc_node mm/slub.c:4286 [inline] __kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4304 __kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:645 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: 9169 Comm: syz.7.774 Not tainted 6.13.0-rc6-syzkaller-00036-gfbfd64d25c7a #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