From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) (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 1C80125DAF0 for ; Thu, 24 Jul 2025 10:44:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753353872; cv=none; b=ajnuUe179/6AOi6Ng/uFkw2Y/EfeeLpvJnW1btvV7v7byakqLdufHTeJ+4FTgonfh079gtkO6suFDOkyXkLhrIzTTyti7yRNQW38ITLzyQQ7z7Nse40JiKLogNCfmow/Ia/hrUWy6kL2PNYiEhWDHw34QaVU8CTTGpOxZOmn+JA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753353872; c=relaxed/simple; bh=ClG6q54a5lBl1NKCJt07q67C5WOkG1Ft1JWXb3cUwHI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ceIqUx+ezFXLbf7TR7s97DbtwhfQAlF/cfEei0Q1masGFK5oUWWtxsvALh2A2ZFDwUpj9604af7pbjxU7QKPdLu5C6T2jsZUZscad0UrDqSxHIDKRswY+oBjFbA2Ao+sbvp5jct22hDnwgi/w25EyNhigWTFdl7fe+sqVdOpYuk= 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=209.85.166.79 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-f79.google.com with SMTP id ca18e2360f4ac-87c43c2af72so95898239f.0 for ; Thu, 24 Jul 2025 03:44:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1753353870; x=1753958670; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=WHNLdLaWAvFQ06/dX1A0QL+mVzYnYIsWtU3obir3xlE=; b=jFIkCLJ5gXwIpj9T7nQMQY103KeDibv9pGS/TR4LLVCWuZNcz3DspmhSoKQjBQjuSO K6jCmnX3aSR6IrhLL4d50sgIHxy9eMNF80jnhd1RRSR0gE7Mjab7f26HSbeWUruu2aYl T7Zuq7C4brvMn0A2pJo4TlureR2cOI5CIUSdWoSPYnpZDw7/r2Q0IZSZSY2BusqvE2T+ BWlgIt45Wk1kIqUQos+1mDetAvsyb/upvJCI229VJaaHdzcD0AZ3xgcPFkGjK6eUzfj7 2xNA9KoHraTKnTfgyDrATahfOXh+ffNhDKgAFhlTv/8NH3v6/ky+FnS1NAkDstnerqdl 3zaA== X-Forwarded-Encrypted: i=1; AJvYcCUw3LaNv0kbjCojIT+IfbbcdSqP8oEn08UI3L24XlTD7r0ktRx9FUV4WK9H5r1UckEJ/YzkMOrgNGxXwiw=@vger.kernel.org X-Gm-Message-State: AOJu0YzeYo2r4ihnztC7rHSgaTqwV3lchUh4GbwhJ+BinvxvCoWvn5Wf 4TVVQKUp8zpIObr04BMriFDo67qkjEeqvKQVkrw0pS3tZVVOrVdMR41VVsSPtkMsZmy6lQBT36f UWFc8vG4zlUdEvDzVnPjWIuVatNPjC5W7cy0rEAj9oE5qrM0ch25GskqD6xQ= X-Google-Smtp-Source: AGHT+IGzPeiYlxtLes5JWty/tcmMQYsqm2aqGPTggCJEj308MjXFQC3amVZwlAdbFy6NoMGbIFEc58NdYmvSh4gdQ36A8NwhIrt2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:6414:b0:876:a7cc:6eb7 with SMTP id ca18e2360f4ac-87c64ff4d1dmr1213377139f.9.1753353870126; Thu, 24 Jul 2025 03:44:30 -0700 (PDT) Date: Thu, 24 Jul 2025 03:44:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68820e8e.a00a0220.2f88df.0022.GAE@google.com> Subject: [syzbot] [kernel?] KMSAN: uninit-value in hrtimer_wakeup From: syzbot To: anna-maria@linutronix.de, frederic@kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: bf61759db409 Merge tag 'sched_ext-for-6.16-rc6-fixes' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1693938c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5227c65742122bdd dashboard link: https://syzkaller.appspot.com/bug?extid=e84a763987edd173d82f compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c9e297bb553f/disk-bf61759d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7f2d1bf53414/vmlinux-bf61759d.xz kernel image: https://storage.googleapis.com/syzbot-assets/9a4f67426eab/bzImage-bf61759d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e84a763987edd173d82f@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in hrtimer_wakeup+0xcb/0xd0 kernel/time/hrtimer.c:1997 hrtimer_wakeup+0xcb/0xd0 kernel/time/hrtimer.c:1997 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x556/0xd80 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x456/0xb80 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0xa7/0x420 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x7f/0x90 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 memmove+0x28/0x1b0 arch/x86/lib/memmove_64.S:45 ext4_xattr_set_entry+0x1928/0x3440 fs/ext4/xattr.c:1773 ext4_xattr_block_set+0xc82/0x5010 fs/ext4/xattr.c:2020 ext4_xattr_set_handle+0x2a44/0x2c00 fs/ext4/xattr.c:2447 ext4_xattr_set+0x2ff/0x5b0 fs/ext4/xattr.c:2549 ext4_xattr_trusted_set+0x51/0x70 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x742/0x850 fs/xattr.c:200 __vfs_setxattr_noperm+0x224/0xad0 fs/xattr.c:234 __vfs_setxattr_locked+0x448/0x490 fs/xattr.c:295 vfs_setxattr+0x27f/0x640 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x3a4/0xcc0 fs/xattr.c:665 path_setxattrat+0x734/0x820 fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __x64_sys_lsetxattr+0x103/0x1c0 fs/xattr.c:750 x64_sys_call+0x2464/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:190 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable t created at: hrtimer_nanosleep+0x48/0x480 kernel/time/hrtimer.c:2142 common_nsleep+0x118/0x160 kernel/time/posix-timers.c:1353 CPU: 0 UID: 0 PID: 17784 Comm: syz.6.3366 Not tainted 6.16.0-rc6-syzkaller-00279-gbf61759db409 #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ===================================================== --- 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