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 722141FECA1 for ; Wed, 11 Dec 2024 17:23:20 +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=1733937803; cv=none; b=dV526OBPx4OvF/Z71MQnmxnyV2XGtCbz7qPtdDLF2O8iY2lkXbb6yS6wZ7DyMYODWx7mzRgUZB1KgJoAxy0Q9VeTQOs4xlAS/Cr26nQ1a2vzHxpE9uOLltiChEkTZQ07YxwUoE0eU8m1Si5HGawKarIb/gUaMRid1NeoJmRuedU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733937803; c=relaxed/simple; bh=IdYyK45BBh7f/4V4ntwntZE9St/TyZ24rrMt5FYpbbg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=a+nCPwo5peNUAcsVRbpovoLMmfA9F0ShxVQENfBAFvSTTVNagchVN4yYXU/Xsa09SR5VXv0cFt2ffHuMcn9DdOL11V9gSrY6esDtVGjFIK52Q+cQiqhK+MN8UJZAeWjedk+SuA35IuATiHMRqOCSWax6vdWXV3MwYPRgIRQS1jQ= 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-3a7e4bfae54so69698955ab.0 for ; Wed, 11 Dec 2024 09:23:20 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733937799; x=1734542599; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=6zIba66nBBaj0pJFFxdj0qayV1im2oVhQgHCS7G4314=; b=RpFsYCeesogO7Mc9b0r3b1rbG2A34b/lAFkm8l1XQXjyO9TgCoopBv2NsZ/KL1xd5n NEYA8+qYmoHXJbHWlNjNzIfOWYWkvk5FgwuS/LG/nlApr8f3oFX8nH7NZG0n/P//UpFB FDCK87vBZAVR1yjkbEcPwXA5SRUtc+o6uW7QzIRpvLXF4LP1B59+Cax9Qt/gaxuvqCnL LFk/jTrWxqK/YP9NQy0+69xEFc5s1kFzGrL0cnWm7cT+61y+KZYNRHOiVINrFtD+Zny/ g4RQJYWTPf7CwgUxb9skAn+FzoJvB2tk8j2r8tzDBBzck9zbP+uM7V2NJIHYdI/caOA8 L+lQ== X-Forwarded-Encrypted: i=1; AJvYcCULfNJFTEGWWlOaDwnfubq0ZOAfWto0/WfXew1o65ztZ8VhQiu7p/sTIMWDc3ASH8Dq4483xt73UT62fZQ=@vger.kernel.org X-Gm-Message-State: AOJu0YzRM2KuIUhPCp9l7TikEyPndn/TMitXMHCRu0cO+UwvAeMteCCJ 2Dr3Ut8aJT2A5KTGqvhRKT20IubxVGkCW0ZbEFrdX1SV92f49Hj8fsQQm5Tf0xKzpDuvLhiDZA2 pQ6SnKOVRK2IDyOQx2zImqlTaWDusQ30Jc55xDXvZoCN/0B06qxWGvUA= X-Google-Smtp-Source: AGHT+IEIGIvHwDwx6+RQ0NnRjZl+8AoAo3/8F4AQhkNRaFV1BQ/6Fm0cR7O5PoDYsyerVYVDX6ORpUf1dWrctfkDoyD3+/W/Uxpr Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:160b:b0:3a7:e67f:3c5b with SMTP id e9e14a558f8ab-3ac47a61e9fmr4104265ab.2.1733937799620; Wed, 11 Dec 2024 09:23:19 -0800 (PST) Date: Wed, 11 Dec 2024 09:23:19 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6759ca87.050a0220.1ac542.000e.GAE@google.com> Subject: [syzbot] [kvm?] WARNING in __srcu_check_read_flavor From: syzbot To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, pbonzini@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: af2ea8ab7a54 Add linux-next specific files for 20241205 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1267ab30580000 kernel config: https://syzkaller.appspot.com/x/.config?x=76f158395f6f15fd dashboard link: https://syzkaller.appspot.com/bug?extid=4a606091891fbc6811cf 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/8af0861258fa/disk-af2ea8ab.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ffb38cf7a344/vmlinux-af2ea8ab.xz kernel image: https://storage.googleapis.com/syzbot-assets/6fbd2e50358a/bzImage-af2ea8ab.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4a606091891fbc6811cf@syzkaller.appspotmail.com ------------[ cut here ]------------ CPU 0 old state 10 new state 1 WARNING: CPU: 0 PID: 7665 at kernel/rcu/srcutree.c:734 __srcu_check_read_flavor+0x107/0x150 kernel/rcu/srcutree.c:734 Modules linked in: CPU: 0 UID: 0 PID: 7665 Comm: syz.1.296 Not tainted 6.13.0-rc1-next-20241205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:__srcu_check_read_flavor+0x107/0x150 kernel/rcu/srcutree.c:734 Code: c6 c8 01 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 75 38 41 8b 36 48 c7 c7 60 cc 0b 8c 89 ea 44 89 f9 e8 7a 8e db ff 90 <0f> 0b 90 90 eb a2 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 64 ff ff ff RSP: 0018:ffffc90003d8f638 EFLAGS: 00010246 RAX: 7f55abc023df8500 RBX: ffffe8ffffc66be0 RCX: ffff88801eb93c00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000000000a R08: ffffffff81600dd2 R09: 1ffff110170c519a R10: dffffc0000000000 R11: ffffed10170c519b R12: dffffc0000000000 R13: 0000607f47666bc0 R14: ffffe8ffffc66d88 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faaec237000 CR3: 00000000250bc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: srcu_check_read_flavor include/linux/srcutree.h:269 [inline] srcu_read_lock include/linux/srcu.h:247 [inline] kvm_mmu_notifier_release+0x2f/0xd0 virt/kvm/kvm_main.c:863 mn_hlist_release mm/mmu_notifier.c:321 [inline] __mmu_notifier_release+0x3e4/0x670 mm/mmu_notifier.c:359 mmu_notifier_release include/linux/mmu_notifier.h:402 [inline] exit_mmap+0x142/0xd50 mm/mmap.c:1239 __mmput+0x115/0x3c0 kernel/fork.c:1350 exit_mm+0x220/0x310 kernel/exit.c:570 do_exit+0x9b2/0x28e0 kernel/exit.c:925 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 get_signal+0x16b2/0x1750 kernel/signal.c:3017 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc5e197fed9 Code: Unable to access opcode bytes at 0x7fc5e197feaf. RSP: 002b:00007fc5e27460e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fc5e1b46088 RCX: 00007fc5e197fed9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fc5e1b46088 RBP: 00007fc5e1b46080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc5e1b4608c R13: 0000000000000000 R14: 00007fff899d8670 R15: 00007fff899d8758 --- 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