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 CCB9B1B4151 for ; Sun, 9 Mar 2025 10:46:22 +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=1741517184; cv=none; b=NoZ31B0Zmqn06JdazYEwmEinZYLOXINxaPWL+DyL+q/h4YzOA+IWKQQ4O0BWHPSldf7VAZccRVyml7qyCDwOh9X9jAE6vzwmRMeUEV2C7R8q668PpxcTgxiSdqRK7y4jLAfss7iY92/kptVdqGa++8Swd7M1jdUvDJCkPYea8Lg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741517184; c=relaxed/simple; bh=FVqO0IZhKzpyNhoeFF+PIXD3POnSYl1Rj54YaoYG5VY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=QpwxyuAeEMnpaAaduGBpM2sS+SehCyiARE/pmHs2h0MXqIm6aRae22Hn3rnFQxOjpLBoWcFCooTSBicz1Zh/z+CIzzju/HdUbegIcd2hJ+zIh6ODZH5un3AQwpwLIUxHpS8ehd5zzn2UgQV3xLAZoDuUj0DRgjQSjV7pdMI+2+o= 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-3ce3bbb2b9dso32584565ab.3 for ; Sun, 09 Mar 2025 03:46:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741517182; x=1742121982; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Eco3k+TBsDkbmpqvhJ0sYzrtK8q7foQl94kdUFDByJQ=; b=GYmCH3kjE9vhon6xYnMP1TAfxMZa/4YS8jjTu2BAQG34XW3xM+nNssLfMHAOFyNFew xBMd5mmYTUde+d5c/SozwWPhOkL+8eXs18I6nr/DTaxcpfDPcgD7xGKFo0+u98d1Jop4 INb7LdMUAQPa4z/rpQfXXU2TGL0NMvdzeHp4kAYqHizRdYA6MZJZ3qf8X1xC9rjzx6Gm qeVJIGHnuaEYjCK34DsWqQPRqBuD/4KUNBhk8DP0pXHVfVJIUeq0jQa/BzUJO+OWMiFj fnhDoqlDqfSKDsUerv0IvX8D12WXcLWoAUg037FrrCwkL/cfcIRQD8bZbnUCAsMqTyaF FgNw== X-Forwarded-Encrypted: i=1; AJvYcCWa4krIH5WHZO7qZ3FqPEoZ5ZB2LNLgczahMpscxFf/V3B1ybX0+Qxw5oKJ8B6UYZvjLL91ra8Tr78O2CQ=@vger.kernel.org X-Gm-Message-State: AOJu0YwD77cq7zOSOvr6UUnffNnmcHOiAD3ratg1oQPdIrB/X4fNWyoF 2v405MT+Bt2qCcMBC77Ct/DhyI/FGH4HnBaYmEdlOFxaEH1SHu6ogwI8WwTYd9ATaGjD5EyjI1r /OukORudJYrDuxKu9vqaUau5sjr34uC/jXQ17AK8oXKi1T+rnOsdoFlg= X-Google-Smtp-Source: AGHT+IHXNtwZ3elpyiLwduLxCpHFyTJc4L8eQ/csKiv/3aVcqzCU3ghy5QLbu6JvNnz1rMIkZXlGG7QXOpuUO4MorT5peQ9+Fj6I Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:180c:b0:3d4:276:9a1b with SMTP id e9e14a558f8ab-3d441a06d98mr94835815ab.16.1741517182016; Sun, 09 Mar 2025 03:46:22 -0700 (PDT) Date: Sun, 09 Mar 2025 03:46:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67cd717d.050a0220.e1a89.0006.GAE@google.com> Subject: [syzbot] [can?] KCSAN: data-race in can_send / can_send (5) From: syzbot To: linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, socketcan@hartkopp.net, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 0f52fd4f67c6 Merge tag 'bcachefs-2025-03-06' of git://evil.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12d12a54580000 kernel config: https://syzkaller.appspot.com/x/.config?x=523b0e2f15224775 dashboard link: https://syzkaller.appspot.com/bug?extid=78ce4489b812515d5e4d 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/eb0d7b540c67/disk-0f52fd4f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/51c261332ad9/vmlinux-0f52fd4f.xz kernel image: https://storage.googleapis.com/syzbot-assets/38914a4790c8/bzImage-0f52fd4f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+78ce4489b812515d5e4d@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in can_send / can_send read-write to 0xffff888117566290 of 8 bytes by interrupt on cpu 0: can_send+0x5a2/0x6d0 net/can/af_can.c:290 bcm_can_tx+0x314/0x420 net/can/bcm.c:314 bcm_tx_timeout_handler+0xea/0x280 __run_hrtimer kernel/time/hrtimer.c:1801 [inline] __hrtimer_run_queues+0x20d/0x5e0 kernel/time/hrtimer.c:1865 hrtimer_run_softirq+0xe4/0x2c0 kernel/time/hrtimer.c:1882 handle_softirqs+0xbf/0x280 kernel/softirq.c:561 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:950 smpboot_thread_fn+0x31c/0x4c0 kernel/smpboot.c:164 kthread+0x4ae/0x520 kernel/kthread.c:464 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read-write to 0xffff888117566290 of 8 bytes by interrupt on cpu 1: can_send+0x5a2/0x6d0 net/can/af_can.c:290 bcm_can_tx+0x314/0x420 net/can/bcm.c:314 bcm_tx_timeout_handler+0xea/0x280 __run_hrtimer kernel/time/hrtimer.c:1801 [inline] __hrtimer_run_queues+0x20d/0x5e0 kernel/time/hrtimer.c:1865 hrtimer_run_softirq+0xe4/0x2c0 kernel/time/hrtimer.c:1882 handle_softirqs+0xbf/0x280 kernel/softirq.c:561 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:950 smpboot_thread_fn+0x31c/0x4c0 kernel/smpboot.c:164 kthread+0x4ae/0x520 kernel/kthread.c:464 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0x0000000000002b9d -> 0x0000000000002b9e Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Tainted: G W 6.14.0-rc5-syzkaller-00109-g0f52fd4f67c6 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ================================================================== --- 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