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Fri, 07 Apr 2023 08:14:23 -0700 (PDT) Date: Fri, 07 Apr 2023 08:14:23 -0700 In-Reply-To: <20230407145900.1126-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f6667f05f8c07a83@google.com> Subject: Re: [syzbot] [net?] WARNING in cleanup_net (2) From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in cleanup_net __sock_create+0x380/0x850 net/socket.c:1545 sock_create net/socket.c:1596 [inline] __sys_socket_create net/socket.c:1633 [inline] __sys_socket_create net/socket.c:1618 [inline] __sys_socket+0x133/0x250 net/socket.c:1661 __do_sys_socket net/socket.c:1674 [inline] __se_sys_socket net/socket.c:1672 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1672 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5801 at lib/ref_tracker.c:39 spin_unlock_irqrestore include/linux/spinlock.h:405 [inline] WARNING: CPU: 1 PID: 5801 at lib/ref_tracker.c:39 ref_tracker_dir_exit+0x3a2/0x600 lib/ref_tracker.c:38 Modules linked in: CPU: 1 PID: 5801 Comm: kworker/u4:6 Not tainted 6.3.0-rc3-syzkaller-00148-gf33642224e38-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Workqueue: netns cleanup_net RIP: 0010:ref_tracker_dir_exit+0x3a2/0x600 lib/ref_tracker.c:39 Code: 0f 84 c3 fe ff ff e8 2d 3c 44 fd 44 89 ff e8 c5 f9 ff ff e9 b1 fe ff ff e8 1b 3c 44 fd 48 8b 74 24 10 4c 89 ef e8 de a8 c6 05 <0f> 0b e8 07 3c 44 fd 49 8d 6d 44 be 04 00 00 00 48 89 ef e8 e6 4d RSP: 0018:ffffc900062d7c00 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff88807b16bb90 R08: 0000000000000001 R09: ffffffff914dac8f R10: 0000000000000001 R11: 0000000000000000 R12: ffff88807b16bb90 R13: ffff88807b16bb40 R14: ffff88807b16bb90 R15: ffff88806d492348 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056302b1f4950 CR3: 000000002a8f2000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: net_free net/core/net_namespace.c:447 [inline] net_free net/core/net_namespace.c:441 [inline] cleanup_net+0x8bb/0xb10 net/core/net_namespace.c:634 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Tested on: commit: f3364222 ptp_qoriq: fix memory leak in probe() git tree: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git console output: https://syzkaller.appspot.com/x/log.txt?x=1023511dc80000 kernel config: https://syzkaller.appspot.com/x/.config?x=ea09b0836073ee4 dashboard link: https://syzkaller.appspot.com/bug?extid=7e1e1bdb852961150198 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 patch: https://syzkaller.appspot.com/x/patch.diff?x=168ecf45c80000