From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f69.google.com (mail-oo1-f69.google.com [209.85.161.69]) (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 5E066192B7D for ; Wed, 25 Feb 2026 07:45:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772005534; cv=none; b=UeyAxijdJ8vIBlCLUE2yPemSZFPzVC4vMopqZBZ33X7R26yHNv9B+vmD0jGyBR2UrDDvkzbB++yOIaUZ//XBUasSNcdGriJkv60kcIVlkF0TIAZvrxxGvvE9Q7Aa2FxqciYx1uTeqa/PLgh4yylpx0nYF48cY9eKCIsH1sCJb9g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772005534; c=relaxed/simple; bh=ARExGfk8pPYQJDqLk/3PCjo2uHnPlbdfYWhrRsX83HI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=iOMx3lEnizpxhWsfhWFrZOEOumpaDWdFmTM6aPVlPk7ACajmwzKt1zHRg8o2tU2SSjngEW42PfPYV5wbdwOhwuQRr7cLDeM9vqK53U5lKqszoA7Y/JqULsPSB3cqV37Od1JMblcjLl/Pjvln3Jh3U7q1hXls0lZ8+6wmHO033J8= 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=209.85.161.69 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-oo1-f69.google.com with SMTP id 006d021491bc7-679c6ef156dso21889219eaf.1 for ; Tue, 24 Feb 2026 23:45:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772005530; x=1772610330; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=mLDe8GIjU/+C2exGQ6lXTanjX2d1W4c8d8mATte3ESU=; b=kQUv8zz42L8xDP08++od8I84cd/KHFG3YP6o+pTbPB2EyHTDuOvvWAfWEo4VmzPie3 ReUY6bhtUbZKj01Gs83BR2wodTmtNAWxoXLe5GB0nyxn+QQP8trIKxoR9T+dcYhwAf/G TVkGLpGpCof74o5WoTScbDHMMztaFpjFbSmT65S92v8E0Qw3Q8dal8PDzi9KYiSVSY0J N9cgcLpTtlrzQXixLLglJblvmXm31ii0WkheTtPZAqTuoZafWJ6PTYSEJ1gMvS+H/bHx QouUMbkJX8QwGpGqDzZUynxNo+ct7pIvXM4Hls07W68Dx1KRr16ReQy7TTEwt1xvYpeI DAyA== X-Forwarded-Encrypted: i=1; AJvYcCUsLW3X73nNCM6xkkDiIZdMHRFURL3RNQEV7SJFMNACwOgrGxL4Ciaph6wSph0XbFU/4M8IXvCXFJ4hXbM=@vger.kernel.org X-Gm-Message-State: AOJu0Yz/WRO9AbAOKmfTnFugbakUziRo6qijv0quksf0mN9vonf4Ualr 8WYzfB33Ukag67Z20k6a/mvBpvOY2TILg4XTyD3Re7FNjgNQnHTBaNO1oEzMikI1ce3gqnDO2Mp LssLc8SGtQkCCUBkWpdFdU0vSCgMzxyImpC72+cvje+ECqv6LPK1JEtm9P5A= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:228a:b0:679:e750:6bfa with SMTP id 006d021491bc7-679e9ba98cdmr782299eaf.10.1772005530126; Tue, 24 Feb 2026 23:45:30 -0800 (PST) Date: Tue, 24 Feb 2026 23:45:30 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <699ea89a.a00a0220.21906d.0004.GAE@google.com> Subject: [syzbot] [kernel?] INFO: task hung in rxrpc_destroy_all_connections (5) From: syzbot To: anna-maria@linutronix.de, frederic@kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 7dff99b35460 Remove WARN_ALL_UNSEEDED_RANDOM kernel config.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10ae4202580000 kernel config: https://syzkaller.appspot.com/x/.config?x=af6ed0125ed44356 dashboard link: https://syzkaller.appspot.com/bug?extid=138f5aa6fa94d4802887 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/45c7b6686727/disk-7dff99b3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/36fcc9cd6296/vmlinux-7dff99b3.xz kernel image: https://storage.googleapis.com/syzbot-assets/fe952fd2745b/bzImage-7dff99b3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+138f5aa6fa94d4802887@syzkaller.appspotmail.com INFO: task kworker/u8:0:12022 blocked for more than 143 seconds. Tainted: G U L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:0 state:D stack:23528 pid:12022 tgid:12022 ppid:2 task_flags:0x4208160 flags:0x00080000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:5295 [inline] __schedule+0xfee/0x60e0 kernel/sched/core.c:6907 __schedule_loop kernel/sched/core.c:6989 [inline] schedule+0xdd/0x390 kernel/sched/core.c:7004 schedule_timeout+0x1b2/0x280 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common+0x2e7/0x4c0 kernel/sched/completion.c:121 __flush_workqueue+0x3f7/0x1200 kernel/workqueue.c:4083 rxrpc_destroy_all_connections+0xf9/0x420 net/rxrpc/conn_object.c:477 rxrpc_exit_net+0x7b/0xc0 net/rxrpc/net_ns.c:113 ops_exit_list net/core/net_namespace.c:199 [inline] ops_undo_list+0x2ee/0xab0 net/core/net_namespace.c:252 cleanup_net+0x499/0x920 net/core/net_namespace.c:704 process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275 process_scheduled_works kernel/workqueue.c:3358 [inline] worker_thread+0x5da/0xe40 kernel/workqueue.c:3439 kthread+0x370/0x450 kernel/kthread.c:467 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task syz.8.2467:17905 blocked for more than 144 seconds. Tainted: G U L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.8.2467 state:D stack:25112 pid:17905 tgid:17904 ppid:17004 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5295 [inline] __schedule+0xfee/0x60e0 kernel/sched/core.c:6907 __schedule_loop kernel/sched/core.c:6989 [inline] schedule+0xdd/0x390 kernel/sched/core.c:7004 schedule_timeout+0x1b2/0x280 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common+0x2e7/0x4c0 kernel/sched/completion.c:121 __flush_workqueue+0x3f7/0x1200 kernel/workqueue.c:4083 rxrpc_destroy_all_locals+0x3e/0x190 net/rxrpc/local_object.c:475 rxrpc_exit_net+0x8b/0xc0 net/rxrpc/net_ns.c:115 ops_exit_list net/core/net_namespace.c:199 [inline] ops_undo_list+0x2ee/0xab0 net/core/net_namespace.c:252 setup_net+0x1fa/0x3a0 net/core/net_namespace.c:462 copy_net_ns+0x46f/0x7c0 net/core/net_namespace.c:581 create_new_namespaces+0x3ea/0xac0 kernel/nsproxy.c:130 unshare_nsproxy_namespaces+0xc3/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x455/0xab0 kernel/fork.c:3174 __do_sys_unshare kernel/fork.c:3245 [inline] __se_sys_unshare kernel/fork.c:3243 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3243 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2eed39c629 RSP: 002b:00007f2eee32c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f2eed615fa0 RCX: 00007f2eed39c629 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000080 RBP: 00007f2eed432b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2eed616038 R14: 00007f2eed615fa0 R15: 00007ffca313eaa8 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e7e9220 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline] #0: ffffffff8e7e9220 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline] #0: ffffffff8e7e9220 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775 2 locks held by getty/7330: #0: ffff8880393580a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900035fd2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x1500 drivers/tty/n_tty.c:2211 3 locks held by kworker/u8:0/12022: #0: ffff88801c6ae948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1287/0x1920 kernel/workqueue.c:3250 #1: ffffc900038a7d08 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x93c/0x1920 kernel/workqueue.c:3251 #2: ffffffff905f95d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xb8/0x920 net/core/net_namespace.c:675 1 lock held by syz.8.2467/17905: #0: ffffffff905f95d0 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x451/0x7c0 net/core/net_namespace.c:577 1 lock held by syz.7.2554/18277: #0: ffffffff905f95d0 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x451/0x7c0 net/core/net_namespace.c:577 1 lock held by syz.6.2559/18314: #0: ffffffff905f95d0 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x451/0x7c0 net/core/net_namespace.c:577 1 lock held by syz.9.2571/18373: #0: ffff8880781f9348 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #0: ffff8880781f9348 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: __sock_release+0x86/0x260 net/socket.c:661 1 lock held by syz.0.2623/18776: #0: ffffffff905f95d0 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x451/0x7c0 net/core/net_namespace.c:577 1 lock held by syz.3.2744/19524: #0: ffffffff905f95d0 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x451/0x7c0 net/core/net_namespace.c:577 1 lock held by syz.2.2835/20011: #0: ffffffff905f95d0 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x451/0x7c0 net/core/net_namespace.c:577 2 locks held by syz.1.2847/20056: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Tainted: G U L syzkaller #0 PREEMPT(full) Tainted: [U]=USER, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x1d7/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x141/0x190 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline] watchdog+0xd25/0x1050 kernel/hung_task.c:515 kthread+0x370/0x450 kernel/kthread.c:467 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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