From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f206.google.com (mail-oi1-f206.google.com [209.85.167.206]) (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 ADADD39C012 for ; Wed, 17 Jun 2026 08:41:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781685697; cv=none; b=odPzdv7SpiJKTZnEa+7OymUgXVt/Qk/ejL6frubkLMUYNcm+9f4YNdyFWPdp22//gKdJ53kM+MQT/LvMjQ469gFFRkyeZIXz85fiLlZoMtCsA4LD7Cy14X8U33+k1NuWpa5C1iIdJrItrwoBWlcl++SHx1mk8jfZXSaxZ2p8+as= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781685697; c=relaxed/simple; bh=VXS6XudEQAPjMBd/7aKbTLEixeQJWMYmcVf/vQFJn58=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=X546GX7tqFi5y2ac4cQIsSIT3MlTEF0l6nQznc+98BU9CEZX4BOjkAVnhqolWKBjj/JoIZSMXwoWZQmkkMDfOdhhZ50q8XTV/BwiFvvS7Z33ygstguxIRT9nu+Rgfq1uzEdGoLqrFvhruil1zg8YlJXkaXHY+oaGALWi3VRR0UA= 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=209.85.167.206 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-oi1-f206.google.com with SMTP id 5614622812f47-48679a595e2so8187067b6e.3 for ; Wed, 17 Jun 2026 01:41:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781685693; x=1782290493; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=P6PXUHS/IFR4w+OORuxpA79Vor0EvBF7s+4hHeE2tas=; b=HobOkixi3DKGcNiXs0jpIfF44iEB080Hvdq2gLlQFJij58Ez0UYpe2nqEzCB3yPNKD /KpvLjK0z6MQkpnvmeJNBRa4wriIkIePk3DE3tJNMSHFg695ixFZAvEMs+4BeNxL0xqX B9E0axI5TKMVdt6/WcK4+3pvO/TEvAARqTJC5kRm+539lC2nT8YZW6LONzvbO9IhntP2 yn1DAwiEotyhC7JEhVTYfx2gnttJ++yBRjPGBxCm8ZCM6qqmZIBIBoPn0OpBXZw2JvQD UMc3z3RITGQ8Eyrb8pvaLcV9NHya3PcH5MGLN7r+BJPpRJm9AIlkk7tW2oB2wD7JMNJY GWhw== X-Forwarded-Encrypted: i=1; AFNElJ+oUE0WcDPwpuCEgOwrncxZKoZUCiVIbU/jw1tENfz8XDx2fU6RnTrG8MvBuTepSxdft9lg3g5MRrAhyYWKEOWhiwUmLeU=@vger.kernel.org X-Gm-Message-State: AOJu0YwiAzT2BlEX8VGnU61meIVnmTbe0o/cIcKX9bOIoUYrh4p0d9oV E4xXufVAMYbjKEmB65WTy3LJ7mQp5cUubPbEoVA4chXAyj9TdjXdh1zYm0SZDKrGJIcWW0lLWDP QY8cdxNYTT5INq/3hi0mZPsflv7ckYnaDCGj7oPSyvohuX1sJpQUVcXILv78= Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1692:b0:486:39db:ebfd with SMTP id 5614622812f47-48942aafea7mr2550142b6e.33.1781685693573; Wed, 17 Jun 2026 01:41:33 -0700 (PDT) Date: Wed, 17 Jun 2026 01:41:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a325dbd.dc986f81.2c135.0008.GAE@google.com> Subject: [syzbot] [tomoyo?] KMSAN: uninit-value in tomoyo_path_chown (3) From: syzbot To: jmorris@namei.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, paul@paul-moore.com, penguin-kernel@I-love.SAKURA.ne.jp, serge@hallyn.com, syzkaller-bugs@googlegroups.com, takedakn@nttdata.co.jp, tomoyo-users_en@lists.sourceforge.net Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 2b414a95b8f7 Merge tag 's390-7.1-5' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12cff156580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a0ca3b8cb3875012 dashboard link: https://syzkaller.appspot.com/bug?extid=eaae8fa60ce81f1e4eeb compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d7dcdf890eed/disk-2b414a95.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/214784598f3b/vmlinux-2b414a95.xz kernel image: https://storage.googleapis.com/syzbot-assets/403c25c5a3db/bzImage-2b414a95.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+eaae8fa60ce81f1e4eeb@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in tomoyo_path_chown+0x128/0x270 security/tomoyo/tomoyo.c:380 tomoyo_path_chown+0x128/0x270 security/tomoyo/tomoyo.c:380 security_path_chown+0x1c0/0x710 security/security.c:1598 chown_common+0x69f/0xcb0 fs/open.c:771 do_fchownat+0x20f/0x490 fs/open.c:804 __do_sys_chown fs/open.c:824 [inline] __se_sys_chown fs/open.c:822 [inline] __x64_sys_chown+0x9d/0x110 fs/open.c:822 x64_sys_call+0x30cc/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:93 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15d/0x3c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable newattrs created at: chown_common+0xbc/0xcb0 fs/open.c:746 do_fchownat+0x20f/0x490 fs/open.c:804 CPU: 1 UID: 0 PID: 4943 Comm: udevd Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 ===================================================== --- 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