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 EF8BD342CB8 for ; Tue, 2 Sep 2025 17:24:31 +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=1756833874; cv=none; b=MOlEJh69A6r0T6fWB1qyXZsRWA0az0DtXTUvcVlRehzfR9hVHk/2F3ceaw27VFqRkdGdZlM/8lQdLF67tfvfY2uWeq9y6IO1p+mFgG/i0pp5URpgf86+z7GyBA9AFVlpJ3/U6TXJhCDXbd2zjhPlG6OMEH2s4ogbWe/P9bUFisw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756833874; c=relaxed/simple; bh=r9KSlUAqtHp2GW8vv6y/Cz/b8ewlS56gHFEjxdFHR6k=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=jr24RMk47gf+hWDUL/lbCOrRE5gNehZJbIiOROuYqhU16CSR0CeAeLBG8HkhH2+Gi0QDpCFePVDDiY7k/C7E1ZyOLIbgqUWPcRE/HU+dayoeTGCvMht5Nc8PLG1JIZqK6lc53pGPnh9+VyjtR/pkAA1F93husTeH+wJmr+uuf70= 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-3f12be6bc4aso69208785ab.1 for ; Tue, 02 Sep 2025 10:24:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756833871; x=1757438671; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=iUma2pL435+m+LJeRZecgruwf95ej2KARn6kielNE/Y=; b=aCKbFhnrQRfwXt7p82FrNoLI6XzvavgD6tnGjurdidz/6tYIRFEjOs/0+rhdyKCmqJ Rvio63zpGtKRO/jPJsR8/HxDnQ/xEj1pgv+22CDATN+sVXTf39eifx5GJNUvhn8jb1+J OipJFsh/UKYkom1OA1/jp8Aje72DroZXbqAkNOIgAQjIWfqy+ULAgqaTf8Nnem7Ve30u RKgJ2WELk01XT6rsuuMefJ0rp3S+GkVtHRrXRSi40EAD//YRIpod9tj948Pn0bvRGHOn qPnzFU+2DZg0rOIdkLqE9lrPICjBkyrGGJ5W8eAJiPV79m2bZQn9t8wtovE998G0967M Knug== X-Forwarded-Encrypted: i=1; AJvYcCVrtXoOJoAsvU2hA9ItrXrnVADDW3m6oXe6JasYaNntQ82a3xodObkMjjAZy9JTwRDB7YqfehQ=@vger.kernel.org X-Gm-Message-State: AOJu0Yy1cJWJdKLxntjhj9iWLXeSUiAFGcP5NPjm4MgYq38KanI+/PNr /izjj/ZLo2YDVdUCMOa6882+T87O6aK1BdeXjShBJzrtX/G8Q78xTlKoQeHegBqrLJ61lgyl7g6 o++uwmkG6hHQwfChN1iZQJzxWDshNVEhxHTEARhKmOQV5PcmdR6DnvkRlOfo= X-Google-Smtp-Source: AGHT+IGe/LZznh6QHYuzY5n8pRqCjbwP8uuEjnaXH9wZGnRBDb5t26Nc/bad4amg7ZszYO+VLvo6VmdgB0gE0LUNWNg8fzMod4WA Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:4702:b0:3f6:5688:a088 with SMTP id e9e14a558f8ab-3f65688a0c7mr60399325ab.10.1756833871128; Tue, 02 Sep 2025 10:24:31 -0700 (PDT) Date: Tue, 02 Sep 2025 10:24:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68b7284f.050a0220.3db4df.01d7.GAE@google.com> Subject: [syzbot] [hams?] WARNING: ODEBUG bug in __run_timers (3) From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-hams@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: b320789d6883 Linux 6.17-rc4 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1204ae62580000 kernel config: https://syzkaller.appspot.com/x/.config?x=da02162f945f3311 dashboard link: https://syzkaller.appspot.com/bug?extid=7287222a6d88bdb559a7 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, 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/7a46ec41bf8b/disk-b320789d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/876c0ffbc199/vmlinux-b320789d.xz kernel image: https://storage.googleapis.com/syzbot-assets/aa352d634f96/bzImage-b320789d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7287222a6d88bdb559a7@syzkaller.appspotmail.com ------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff88806ac3a490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2880 WARNING: CPU: 0 PID: 10082 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612 Modules linked in: CPU: 0 UID: 0 PID: 10082 Comm: syz.1.930 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 41 56 48 8b 14 dd 60 41 16 8c 4c 89 e6 48 c7 c7 e0 35 16 8c e8 cf 43 91 fc 90 <0f> 0b 90 90 58 83 05 46 ce c2 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d RSP: 0018:ffffc90000007a28 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817a3358 RDX: ffff888030b6bc00 RSI: ffffffff817a3365 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8c163c80 R13: ffffffff8bafedc0 R14: ffffffff8a7fa4f0 R15: ffffc90000007b28 FS: 00007f4947a166c0(0000) GS:ffff8881246b9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f49479f5d58 CR3: 0000000030c4f000 CR4: 0000000000350ef0 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline] debug_check_no_obj_freed+0x4b7/0x600 lib/debugobjects.c:1129 slab_free_hook mm/slub.c:2348 [inline] slab_free mm/slub.c:4680 [inline] kfree+0x28f/0x4d0 mm/slub.c:4879 rose_neigh_put include/net/rose.h:166 [inline] rose_timer_expiry+0x53f/0x630 net/rose/rose_timer.c:183 call_timer_fn+0x19a/0x620 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers+0x6ef/0x960 kernel/time/timer.c:2372 __run_timer_base kernel/time/timer.c:2384 [inline] __run_timer_base kernel/time/timer.c:2376 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2393 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403 handle_softirqs+0x219/0x8e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 76 fe 02 f6 48 89 df e8 5e 52 03 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 05 4f f3 f5 65 8b 05 0e ac 41 08 85 c0 74 16 5b RSP: 0018:ffffc9001fae7770 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff888079171200 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffff8de4eebc RDI: ffffffff8c163080 RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff90ab8a97 R11: 0000000000000000 R12: ffff888033eb78c0 R13: 0000000000000246 R14: ffff8880791711e8 R15: ffffc9001fae78f8 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] __skb_try_recv_datagram+0x172/0x4f0 net/core/datagram.c:267 __unix_dgram_recvmsg+0x1bc/0xc30 net/unix/af_unix.c:2601 unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2700 sock_recvmsg_nosec net/socket.c:1065 [inline] ____sys_recvmsg+0x5f9/0x6b0 net/socket.c:2832 ___sys_recvmsg+0x114/0x1a0 net/socket.c:2876 do_recvmmsg+0x2fe/0x750 net/socket.c:2971 __sys_recvmmsg net/socket.c:3045 [inline] __do_sys_recvmmsg net/socket.c:3068 [inline] __se_sys_recvmmsg net/socket.c:3061 [inline] __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3061 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4946b8ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4947a16038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f4946dc6090 RCX: 00007f4946b8ebe9 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f4946c11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4946dc6128 R14: 00007f4946dc6090 R15: 00007fff631b3388 ---------------- Code disassembly (best guess): 0: f5 cmc 1: 53 push %rbx 2: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 7: 48 89 fb mov %rdi,%rbx a: 48 83 c7 18 add $0x18,%rdi e: e8 76 fe 02 f6 call 0xf602fe89 13: 48 89 df mov %rbx,%rdi 16: e8 5e 52 03 f6 call 0xf6035279 1b: f7 c5 00 02 00 00 test $0x200,%ebp 21: 75 23 jne 0x46 23: 9c pushf 24: 58 pop %rax 25: f6 c4 02 test $0x2,%ah 28: 75 37 jne 0x61 * 2a: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction 2f: e8 05 4f f3 f5 call 0xf5f34f39 34: 65 8b 05 0e ac 41 08 mov %gs:0x841ac0e(%rip),%eax # 0x841ac49 3b: 85 c0 test %eax,%eax 3d: 74 16 je 0x55 3f: 5b pop %rbx --- 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