From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) (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 97494187FF4 for ; Sun, 24 Nov 2024 22:47:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732488441; cv=none; b=u0waok39ReY3XnE9S22ComCV+DdV2OQnFVGEacRYc8nFY28f40A+FC24NpkSL0ecKxnxFKQk4tb7UsKMOUU/nIA10pj69vZG9j0Qzk/tczijfzW7+gE6rfD2V/Lp23cnxR/k9a3nLRdhcRZeMiMSpiQigdkK9dsdBfpoYYO+xCs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732488441; c=relaxed/simple; bh=az88jjD+m/dEnUFPrByugEUvS7FeaRpZ53GW24UBV/k=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=M80GPMrDvA4s3rWjYg9fdzRqfqvVFGiOn+xnIIF9NoY3arcZx2fOG2GhaNZ1BR3Wr8RZ243ryt8iHw91GjpWrMynY62A3XQp6bbPZqyquu4m6w9nc/A87v0N4whTHQgeQEGcu88CeMa6xq74LJzYta5TzbnCpeo7KayfCNgggPU= 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=209.85.166.197 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-f197.google.com with SMTP id e9e14a558f8ab-3a794990ef3so30783915ab.1 for ; Sun, 24 Nov 2024 14:47:17 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732488437; x=1733093237; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=nLOpc2daBZkEJbZZavtr8q9boj2I4h/2gRE7M2e8GG4=; b=kL6wnc7X2Rf9quA6iGdH0fT1pWnVjIqeg6kUpi/rrgWAhqosBTT/sXuecWw0GvK8TX 7ut84rs5joIdU/mor5RTnkWPM++YdmzAAfR82VuIUZhIA7bSvjuTDg6Oey6hv0LuXr3x 2XyJHFzuUtwxl7YZIhmncppA9T/p7oicDNbZoG4mUR/5SJOdqBlIv9b0psFHMIJ/Zje0 JYD2GSkhXc+TbsbDiQm1XTp01CmoNTenqUDhjt3O6TJ9hskFU34QNc5iivRNynCcg+qx QgHEUuzXliibz2xdWdSgsQISPgvLQCwNHgTM9abH9ajbwt36ipWtyYkr0njDtVycvxWe lHWg== X-Forwarded-Encrypted: i=1; AJvYcCVZcZN/I8cDzR3ktNUwgIXs7JjxY7lrWucHLT8pj7pkGtXjO252EjVC4Ef+pzBQATa9EfreTpEVWpT/OBGfeIRRCc0=@vger.kernel.org X-Gm-Message-State: AOJu0Yxj83WGmtcrlXkkzQnrMe1xliUmWewnMpk+HUknc82ZyIrE19/j Zj3IZlxI4w2HD+koymKGclr+Id3mBrHYVPdCzgCDGhdx2DRvYH7rDpHvzrw1djN4fWZWfgE4ZmI bBd/d3kZFmrGpaQnPXJ0pTQfj8NeNJ3ovfjjXxVES7mmHzDEOBx9+CJw= X-Google-Smtp-Source: AGHT+IFv+/Hsbpot+wYgw/bf602CIsYWhE/kuSjrU63CPedSRuAwAT3QwEsAvRh8usoiN3UXKl5Qfke0YWSRtdlnK4POUqaY1djS Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c542:0:b0:3a7:ab88:8c0 with SMTP id e9e14a558f8ab-3a7ab88093bmr57589395ab.10.1732488436826; Sun, 24 Nov 2024 14:47:16 -0800 (PST) Date: Sun, 24 Nov 2024 14:47:16 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6743acf4.050a0220.1cc393.004d.GAE@google.com> Subject: [syzbot] [perf?] [trace?] KCSAN: assert: race in srcu_gp_start_if_needed From: syzbot To: acme@kernel.org, adrian.hunter@intel.com, alexander.shishkin@linux.intel.com, irogers@google.com, jolsa@kernel.org, kan.liang@linux.intel.com, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-trace-kernel@vger.kernel.org, mark.rutland@arm.com, mhiramat@kernel.org, mingo@redhat.com, namhyung@kernel.org, oleg@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 42d9e8b7ccdd Merge tag 'powerpc-6.13-1' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10a00778580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3d7fd5be0e73b8b dashboard link: https://syzkaller.appspot.com/bug?extid=16a19b06125a2963eaee 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/ef231513adc7/disk-42d9e8b7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/54caaac5960b/vmlinux-42d9e8b7.xz kernel image: https://storage.googleapis.com/syzbot-assets/85b5a6566143/bzImage-42d9e8b7.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+16a19b06125a2963eaee@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: assert: race in srcu_get_delay kernel/rcu/srcutree.c:658 [inline] BUG: KCSAN: assert: race in srcu_funnel_gp_start kernel/rcu/srcutree.c:1089 [inline] BUG: KCSAN: assert: race in srcu_gp_start_if_needed+0x808/0x9f0 kernel/rcu/srcutree.c:1339 race at unknown origin, with assert no writes to 0xffffffff8676ffc8 of 8 bytes by task 6285 on cpu 0: srcu_get_delay kernel/rcu/srcutree.c:658 [inline] srcu_funnel_gp_start kernel/rcu/srcutree.c:1089 [inline] srcu_gp_start_if_needed+0x808/0x9f0 kernel/rcu/srcutree.c:1339 __call_srcu kernel/rcu/srcutree.c:1384 [inline] __synchronize_srcu+0x114/0x150 kernel/rcu/srcutree.c:1432 synchronize_srcu+0x1ae/0x1d0 uprobe_unregister_sync+0x1a/0x20 kernel/events/uprobes.c:1328 __probe_event_disable kernel/trace/trace_uprobe.c:1138 [inline] probe_event_disable+0x1f5/0x240 kernel/trace/trace_uprobe.c:1222 trace_uprobe_register+0xbb/0x3c0 kernel/trace/trace_uprobe.c:1512 perf_trace_event_unreg+0x6c/0x1a0 kernel/trace/trace_event_perf.c:162 perf_uprobe_destroy+0x6a/0xf0 kernel/trace/trace_event_perf.c:345 _free_event+0x7ca/0xa10 kernel/events/core.c:5357 put_event kernel/events/core.c:5454 [inline] perf_event_release_kernel+0x61a/0x670 kernel/events/core.c:5579 perf_release+0x1f/0x30 kernel/events/core.c:5589 __fput+0x17a/0x6d0 fs/file_table.c:450 ____fput+0x1c/0x30 fs/file_table.c:478 task_work_run+0x13a/0x1a0 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xa8/0x120 kernel/entry/common.c:218 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000000000000000 -> 0x0000000000000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 6285 Comm: syz.1.1056 Not tainted 6.12.0-syzkaller-08756-g42d9e8b7ccdd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ================================================================== --- This report is generated by a bot. 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