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 18EC8179AA for ; Tue, 28 May 2024 04:10:25 +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=1716869427; cv=none; b=V4vjmoCQTfmPFcPOgFgWKkVRi76qO0/bYyaxwCTLExWRbYe4wpsk4W845xZ/L+4VmQwTQzqNWG0Rl9pLaTrBnLoFY/Es+79GmB6tBG8hC3qD5GSB2OXKDEbTDo3+hceKSIe6icyxmGsCzgJtd6T+NAsF0oIvl29BXuj+4xE6Ftk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716869427; c=relaxed/simple; bh=6BMnFEuWeGChFxSyDZ2OuFR5UZxhXp82Y+Rh+dHsGMw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=F6z+4h4mPE9e7fXS1FeYhnSYkhpXg95R8ryWlabOK1ZTJFGSivY2A1bwzT/Ho6QLVmQFbBCb9kk/QQ3K8cLX1rtdM+GAzqsRsMhehJwJX1jibiZ0sCpXUGd4nB5RfYORwX2o9POvO7yei5ddqqHwCH8UHdDUbv7+HIpYQPREHtM= 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-37375e83ee8so3791435ab.1 for ; Mon, 27 May 2024 21:10:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716869425; x=1717474225; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=rT5Pl0xEGoFaDE9obYD33/VWqvAuRBEYSXPf3W0FSjc=; b=TohuVxaAw3Po4mNXgqpIyyb3pFtieym8nOBTRWrMl/q/IkkuX99ZsMPDt1+hQePg4C 2aRcfjMuKWWk1oYVGKxmvF1aLPGVvpCvRRk05mj3elY1ylCTfhVxgXhPBtWfPal65U5E ewpaIbZqbMipAEJAfGU7kbOFjNxlyT5sIjKLTHwplSAKdwq2rIvMJhtsbhsix3ywQSPV OgYYucM6fUTvScvZZXT6SLQ/fUC4QhtWx1yUwkVa++BqTRRvvgS2KsbLTesNPLfw7pfS J4GNdel7382DRq0Qptc5TqGKuuyGUGZCF+y6Dk3bcEwsONXJe1iLMHsMQQ3pSaz7N4GN 29rQ== X-Forwarded-Encrypted: i=1; AJvYcCUPNT8XKcDSosdnUJdov3hJAwC2Qk/1+4U3+CTfRTErRX/Hebt5OyCZswjpdzi+VaqsVjyKB9eehwCB53iWEqgpqy3CsHpaADzccT+0 X-Gm-Message-State: AOJu0YwFRgOCHXZn1bkDYYOXTtju+gEpC8wsBXNroPiJWIxK5fO2ISZE +YiAUtQFMxB2zbwcrX6dhrH+jAKvpLRNr6gqQQvBJkfDATccE7LgoIA0tj9lVFEVgQoy6XF03Ng TPLDaRcZY9q1iVdsTGSZk3X/AQn4tmSbHXMmgHCNHzLNDOg3G5HNE39s= X-Google-Smtp-Source: AGHT+IFHAJBp+FvS2XWXhjiH8pyko7EJ8ajwhNX85Bdt17F3NcGlR0vnwqUakmjvzjez6+hkWtMra1rD3D0frfcY7MtdAdB3mr+K Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c566:0:b0:36c:5228:462 with SMTP id e9e14a558f8ab-3737b31cb5fmr8147455ab.3.1716869425391; Mon, 27 May 2024 21:10:25 -0700 (PDT) Date: Mon, 27 May 2024 21:10:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000039f54b06197bd063@google.com> Subject: [syzbot] [bcachefs?] KMSAN: uninit-value in xattr_cmp_key From: syzbot To: bfoster@redhat.com, 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: 614da38e2f7a Merge tag 'hid-for-linus-2024051401' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1279b784980000 kernel config: https://syzkaller.appspot.com/x/.config?x=f5d2cbf33633f507 dashboard link: https://syzkaller.appspot.com/bug?extid=915b205d9237d1182095 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+915b205d9237d1182095@syzkaller.appspotmail.com bcachefs (loop1): going read-write bcachefs (loop1): done starting filesystem ===================================================== BUG: KMSAN: uninit-value in xattr_cmp_key+0x2f3/0x390 fs/bcachefs/xattr.c:49 xattr_cmp_key+0x2f3/0x390 fs/bcachefs/xattr.c:49 bch2_hash_lookup_in_snapshot fs/bcachefs/str_hash.h:178 [inline] bch2_hash_lookup fs/bcachefs/str_hash.h:202 [inline] bch2_acl_chmod+0xaa2/0x1590 fs/bcachefs/acl.c:423 bch2_setattr_nonsize+0x12ef/0x1830 fs/bcachefs/fs.c:797 bch2_setattr+0x264/0x2f0 fs/bcachefs/fs.c:886 notify_change+0x1a07/0x1af0 fs/attr.c:497 chmod_common+0x3b8/0x630 fs/open.c:650 do_fchmodat fs/open.c:698 [inline] __do_sys_fchmodat fs/open.c:717 [inline] __se_sys_fchmodat fs/open.c:714 [inline] __x64_sys_fchmodat+0x160/0x2b0 fs/open.c:714 x64_sys_call+0x1d6f/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:269 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __kmalloc_large_node+0x231/0x370 mm/slub.c:3994 __do_kmalloc_node mm/slub.c:4027 [inline] __kmalloc_node+0xb10/0x10c0 mm/slub.c:4046 kmalloc_node include/linux/slab.h:648 [inline] kvmalloc_node+0xc0/0x2d0 mm/util.c:634 kvmalloc include/linux/slab.h:766 [inline] btree_bounce_alloc fs/bcachefs/btree_io.c:118 [inline] bch2_btree_node_read_done+0x4e68/0x75e0 fs/bcachefs/btree_io.c:1185 btree_node_read_work+0x8a5/0x1eb0 fs/bcachefs/btree_io.c:1324 bch2_btree_node_read+0x3d42/0x4b50 __bch2_btree_root_read fs/bcachefs/btree_io.c:1748 [inline] bch2_btree_root_read+0xa6c/0x13d0 fs/bcachefs/btree_io.c:1772 read_btree_roots+0x454/0xee0 fs/bcachefs/recovery.c:457 bch2_fs_recovery+0x7b6a/0x93e0 fs/bcachefs/recovery.c:785 bch2_fs_start+0x7b2/0xbd0 fs/bcachefs/super.c:1043 bch2_fs_open+0x152a/0x15f0 fs/bcachefs/super.c:2105 bch2_mount+0x90d/0x1d90 fs/bcachefs/fs.c:1906 legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1779 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875 x64_sys_call+0x2bf4/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 PID: 7935 Comm: syz-executor.1 Not tainted 6.9.0-syzkaller-02707-g614da38e2f7a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 ===================================================== --- 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