From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) (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 2CE4B21CFFD for ; Mon, 10 Nov 2025 01:29:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762738175; cv=none; b=GqG2ybh2DT5Nk4pwVkzKJCQXeGMim9d0/m8OIcwWCRXsNOxxtBvcgi8zWdjXfHK5Q4NhKcDgUnHkBoSWyqLKf/Sit8NF4i7pbLkWaR2T20g6VDFPc6B/ETSHlAkcWionGq6OfzceXmE45ty7wrwPP1lK1XugYgDW42DUo1+wb18= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762738175; c=relaxed/simple; bh=DHlTN2qtuXrq4u5/vIXs+nZfVimey7qzTUmgNJ966i0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=VYaeZat2HsSjq4hW10A8OwNnAhzoA/9xmO0Iybpvt+W5PkulNcWyR91qX+NZMQV/3gDRpuRZULbasEvYpdKquxLs0k0ssZjY0TDHuPXQ4VaDtjXGQAP5I8ZlqrHQZGc7CyMVtKm+GF7Y2/b/utlgsJWaO7LKH1R7aT7lmURNhYY= 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=209.85.166.207 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-f207.google.com with SMTP id e9e14a558f8ab-433692f7479so21802315ab.3 for ; Sun, 09 Nov 2025 17:29:33 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762738172; x=1763342972; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=7JnwAT+Izqirtc4C6DNmUAJQECRSK2FvKEk84uKoC9g=; b=FDMnZoQQ4hnRn+xcSta5ksYUFYEYaploAXBTFGbE92TU9NWqsldM/AyQOPr5OexcK8 CJgRCiStKvpkz7nJVlooczT4N2fOANbvZv4REx1ub1d8T67Uej7ewt/1Ez3QNTxjp8Dq ZjMSuHeKUQttMHFpY6wkWlFDiX2i+guADZvNu32jiV9TjrzwzjA6OgYUA2r+9fekZ2LF +TzuB5jiZcvU3d9g2HD4Ss0cg/BSXCQ5FdN7lNnoHh5lB1AHAgsWx6CnbHcMWQSoSl6x QQPMb5mMWOMKTBQbT6ld2Hv9jqQAj30tQMi8PSBOW1V88HCEwMgt9mojk+ECc4vExzXO g8XA== X-Forwarded-Encrypted: i=1; AJvYcCWeL0bVyxO2WP9FtMBNh0u62G1rc9Ns9ZMQ8lt+PWIoFE1UVGl8Ls3eR0QGzonhsDP3674ez80=@vger.kernel.org X-Gm-Message-State: AOJu0YzSRtWVmV3p+zolqAidYYxVtJkzj80C1svd/BmevhzvRpzC8cJ+ IOWCLN4EzF2reGB+8E8fh3ArvS0mk4X36JYmyII9rHXfks0/6zT/3hiC6h1kF6tGTHTw+Z6qvXY D4vXn4tzMBBRgnxleXGDSKnU5dPdPORvLqX7EaGB43oe44AqosrTYjk9W+eI= X-Google-Smtp-Source: AGHT+IGL1DQo0usZ0xWVNpwQmqa4othw2NAo5Ty/9rDbXXjja6bVkz4DyseLg/De2o+vHYbO5JfKU0H4L5zdy1B/935jN2qIGDpd Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2581:b0:433:7a7c:e29f with SMTP id e9e14a558f8ab-4337a7d0856mr39178395ab.21.1762738172371; Sun, 09 Nov 2025 17:29:32 -0800 (PST) Date: Sun, 09 Nov 2025 17:29:32 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69113ffc.a70a0220.22f260.00cd.GAE@google.com> Subject: [syzbot] [mptcp?] possible deadlock in mptcp_subflow_shutdown (2) From: syzbot To: davem@davemloft.net, edumazet@google.com, geliang@kernel.org, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, martineau@kernel.org, matttbe@kernel.org, mptcp@lists.linux.dev, 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: dc77806cf3b4 Merge tag 'rust-fixes-6.18' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17dd9bcd980000 kernel config: https://syzkaller.appspot.com/x/.config?x=19d831c6d0386a9c dashboard link: https://syzkaller.appspot.com/bug?extid=7902f127c28c701e913f 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/a1c9259ca92c/disk-dc77806c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/98d084f2ad8b/vmlinux-dc77806c.xz kernel image: https://storage.googleapis.com/syzbot-assets/c25e628e3491/bzImage-dc77806c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7902f127c28c701e913f@syzkaller.appspotmail.com ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.7.3695/23717 is trying to acquire lock: ffff888087316860 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1679 [inline] ffff888087316860 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_subflow_shutdown+0x24/0x380 net/mptcp/protocol.c:2918 but task is already holding lock: ffff888026899a60 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1679 [inline] ffff888026899a60 (sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_close+0x1d/0xe0 net/mptcp/protocol.c:3168 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #7 (sk_lock-AF_INET){+.+.}-{0:0}: lock_sock_nested+0x41/0xf0 net/core/sock.c:3720 lock_sock include/net/sock.h:1679 [inline] inet_shutdown+0x67/0x440 net/ipv4/af_inet.c:907 nbd_mark_nsock_dead+0xae/0x5d0 drivers/block/nbd.c:319 recv_work+0x671/0xa80 drivers/block/nbd.c:1024 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #6 (&nsock->tx_lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:598 [inline] __mutex_lock+0x193/0x1060 kernel/locking/mutex.c:760 nbd_handle_cmd drivers/block/nbd.c:1146 [inline] nbd_queue_rq+0x423/0x12d0 drivers/block/nbd.c:1210 blk_mq_dispatch_rq_list+0x416/0x1e20 block/blk-mq.c:2129 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:168 [inline] blk_mq_do_dispatch_sched block/blk-mq-sched.c:182 [inline] __blk_mq_sched_dispatch_requests+0xcb7/0x15f0 block/blk-mq-sched.c:307 blk_mq_sched_dispatch_requests+0xd8/0x1b0 block/blk-mq-sched.c:329 blk_mq_run_hw_queue+0x239/0x670 block/blk-mq.c:2367 blk_mq_dispatch_list+0x514/0x1310 block/blk-mq.c:2928 blk_mq_flush_plug_list block/blk-mq.c:2976 [inline] blk_mq_flush_plug_list+0x130/0x600 block/blk-mq.c:2948 __blk_flush_plug+0x2c4/0x4b0 block/blk-core.c:1225 blk_finish_plug block/blk-core.c:1252 [inline] blk_finish_plug block/blk-core.c:1249 [inline] __submit_bio+0x545/0x690 block/blk-core.c:651 __submit_bio_noacct_mq block/blk-core.c:724 [inline] submit_bio_noacct_nocheck+0x53d/0xc10 block/blk-core.c:755 submit_bio_noacct+0x5bd/0x1f60 block/blk-core.c:879 submit_bh fs/buffer.c:2829 [inline] block_read_full_folio+0x4db/0x850 fs/buffer.c:2461 filemap_read_folio+0xc8/0x2a0 mm/filemap.c:2444 do_read_cache_folio+0x263/0x5c0 mm/filemap.c:4024 read_mapping_folio include/linux/pagemap.h:999 [inline] read_part_sector+0xd4/0x370 block/partitions/core.c:722 adfspart_check_ICS+0x93/0x940 block/partitions/acorn.c:360 check_partition block/partitions/core.c:141 [inline] blk_add_partitions block/partitions/core.c:589 [inline] bdev_disk_changed+0x723/0x1520 block/partitions/core.c:693 blkdev_get_whole+0x187/0x290 block/bdev.c:748 bdev_open+0x2c7/0xe40 block/bdev.c:957 blkdev_open+0x34e/0x4f0 block/fops.c:701 do_dentry_open+0x982/0x1530 fs/open.c:965 vfs_open+0x82/0x3f0 fs/open.c:1097 do_open fs/namei.c:3975 [inline] path_openat+0x1de4/0x2cb0 fs/namei.c:4134 do_filp_open+0x20b/0x470 fs/namei.c:4161 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #5 (&cmd->lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:598 [inline] __mutex_lock+0x193/0x1060 kernel/locking/mutex.c:760 nbd_queue_rq+0xbd/0x12d0 drivers/block/nbd.c:1202 blk_mq_dispatch_rq_list+0x416/0x1e20 block/blk-mq.c:2129 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:168 [inline] blk_mq_do_dispatch_sched block/blk-mq-sched.c:182 [inline] __blk_mq_sched_dispatch_requests+0xcb7/0x15f0 block/blk-mq-sched.c:307 blk_mq_sched_dispatch_requests+0xd8/0x1b0 block/blk-mq-sched.c:329 blk_mq_run_hw_queue+0x239/0x670 block/blk-mq.c:2367 blk_mq_dispatch_list+0x514/0x1310 block/blk-mq.c:2928 blk_mq_flush_plug_list block/blk-mq.c:2976 [inline] blk_mq_flush_plug_list+0x130/0x600 block/blk-mq.c:2948 __blk_flush_plug+0x2c4/0x4b0 block/blk-core.c:1225 blk_finish_plug block/blk-core.c:1252 [inline] blk_finish_plug block/blk-core.c:1249 [inline] __submit_bio+0x545/0x690 block/blk-core.c:651 __submit_bio_noacct_mq block/blk-core.c:724 [inline] submit_bio_noacct_nocheck+0x53d/0xc10 block/blk-core.c:755 submit_bio_noacct+0x5bd/0x1f60 block/blk-core.c:879 submit_bh fs/buffer.c:2829 [inline] block_read_full_folio+0x4db/0x850 fs/buffer.c:2461 filemap_read_folio+0xc8/0x2a0 mm/filemap.c:2444 do_read_cache_folio+0x263/0x5c0 mm/filemap.c:4024 read_mapping_folio include/linux/pagemap.h:999 [inline] read_part_sector+0xd4/0x370 block/partitions/core.c:722 adfspart_check_ICS+0x93/0x940 block/partitions/acorn.c:360 check_partition block/partitions/core.c:141 [inline] blk_add_partitions block/partitions/core.c:589 [inline] bdev_disk_changed+0x723/0x1520 block/partitions/core.c:693 blkdev_get_whole+0x187/0x290 block/bdev.c:748 bdev_open+0x2c7/0xe40 block/bdev.c:957 blkdev_open+0x34e/0x4f0 block/fops.c:701 do_dentry_open+0x982/0x1530 fs/open.c:965 vfs_open+0x82/0x3f0 fs/open.c:1097 do_open fs/namei.c:3975 [inline] path_openat+0x1de4/0x2cb0 fs/namei.c:4134 do_filp_open+0x20b/0x470 fs/namei.c:4161 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #4 (set->srcu){.+.+}-{0:0}: srcu_lock_sync include/linux/srcu.h:173 [inline] __synchronize_srcu+0xa1/0x290 kernel/rcu/srcutree.c:1439 blk_mq_wait_quiesce_done block/blk-mq.c:283 [inline] blk_mq_wait_quiesce_done block/blk-mq.c:280 [inline] blk_mq_quiesce_queue block/blk-mq.c:303 [inline] blk_mq_quiesce_queue+0x149/0x1b0 block/blk-mq.c:298 elevator_switch+0x17d/0x810 block/elevator.c:588 elevator_change+0x391/0x5d0 block/elevator.c:691 elevator_set_default+0x2e9/0x380 block/elevator.c:767 blk_register_queue+0x384/0x4e0 block/blk-sysfs.c:942 __add_disk+0x74a/0xf00 block/genhd.c:528 add_disk_fwnode+0x13f/0x5d0 block/genhd.c:597 add_disk include/linux/blkdev.h:775 [inline] nbd_dev_add+0x783/0xbb0 drivers/block/nbd.c:1987 nbd_init+0x1a2/0x3c0 drivers/block/nbd.c:2702 do_one_initcall+0x123/0x6e0 init/main.c:1283 do_initcall_level init/main.c:1345 [inline] do_initcalls init/main.c:1361 [inline] do_basic_setup init/main.c:1380 [inline] kernel_init_freeable+0x5c8/0x920 init/main.c:1593 kernel_init+0x1c/0x2b0 init/main.c:1483 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #3 (&q->elevator_lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:598 [inline] __mutex_lock+0x193/0x1060 kernel/locking/mutex.c:760 queue_requests_store+0x3a7/0x670 block/blk-sysfs.c:117 queue_attr_store+0x26b/0x310 block/blk-sysfs.c:869 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:142 kernfs_fop_write_iter+0x3af/0x570 fs/kernfs/file.c:352 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x7d3/0x11d0 fs/read_write.c:686 ksys_write+0x12a/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&q->q_usage_counter(io)#52){++++}-{0:0}: blk_alloc_queue+0x619/0x760 block/blk-core.c:461 blk_mq_alloc_queue+0x172/0x280 block/blk-mq.c:4399 __blk_mq_alloc_disk+0x29/0x120 block/blk-mq.c:4446 nbd_dev_add+0x492/0xbb0 drivers/block/nbd.c:1957 nbd_init+0x1a2/0x3c0 drivers/block/nbd.c:2702 do_one_initcall+0x123/0x6e0 init/main.c:1283 do_initcall_level init/main.c:1345 [inline] do_initcalls init/main.c:1361 [inline] do_basic_setup init/main.c:1380 [inline] kernel_init_freeable+0x5c8/0x920 init/main.c:1593 kernel_init+0x1c/0x2b0 init/main.c:1483 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #1 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:4269 [inline] fs_reclaim_acquire+0x102/0x150 mm/page_alloc.c:4283 might_alloc include/linux/sched/mm.h:318 [inline] slab_pre_alloc_hook mm/slub.c:4921 [inline] slab_alloc_node mm/slub.c:5256 [inline] __kmalloc_cache_noprof+0x58/0x780 mm/slub.c:5758 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] ref_tracker_alloc+0x18e/0x5b0 lib/ref_tracker.c:271 __netns_tracker_alloc include/net/net_namespace.h:362 [inline] netns_tracker_alloc include/net/net_namespace.h:371 [inline] get_net_track include/net/net_namespace.h:388 [inline] sk_net_refcnt_upgrade+0x141/0x1e0 net/core/sock.c:2384 rds_tcp_tune+0x23d/0x530 net/rds/tcp.c:507 rds_tcp_conn_path_connect+0x305/0x7f0 net/rds/tcp_connect.c:127 rds_connect_worker+0x1af/0x2c0 net/rds/threads.c:176 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #0 (k-sk_lock-AF_INET){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 lock_sock_nested+0x41/0xf0 net/core/sock.c:3720 lock_sock include/net/sock.h:1679 [inline] mptcp_subflow_shutdown+0x24/0x380 net/mptcp/protocol.c:2918 mptcp_check_send_data_fin+0x248/0x440 net/mptcp/protocol.c:3022 __mptcp_close+0x90e/0xbe0 net/mptcp/protocol.c:3116 mptcp_close+0x28/0xe0 net/mptcp/protocol.c:3170 inet_release+0xed/0x200 net/ipv4/af_inet.c:437 __sock_release+0xb3/0x270 net/socket.c:662 sock_close+0x1c/0x30 net/socket.c:1455 __fput+0x402/0xb70 fs/file_table.c:468 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x130 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: k-sk_lock-AF_INET --> &nsock->tx_lock --> sk_lock-AF_INET Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET); lock(&nsock->tx_lock); lock(sk_lock-AF_INET); lock(k-sk_lock-AF_INET); *** DEADLOCK *** 2 locks held by syz.7.3695/23717: #0: ffff88805bc9ef48 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff88805bc9ef48 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:661 #1: ffff888026899a60 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1679 [inline] #1: ffff888026899a60 (sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_close+0x1d/0xe0 net/mptcp/protocol.c:3168 stack backtrace: CPU: 0 UID: 0 PID: 23717 Comm: syz.7.3695 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2043 check_noncircular+0x14c/0x170 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x126f/0x1c90 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825 lock_sock_nested+0x41/0xf0 net/core/sock.c:3720 lock_sock include/net/sock.h:1679 [inline] mptcp_subflow_shutdown+0x24/0x380 net/mptcp/protocol.c:2918 mptcp_check_send_data_fin+0x248/0x440 net/mptcp/protocol.c:3022 __mptcp_close+0x90e/0xbe0 net/mptcp/protocol.c:3116 mptcp_close+0x28/0xe0 net/mptcp/protocol.c:3170 inet_release+0xed/0x200 net/ipv4/af_inet.c:437 __sock_release+0xb3/0x270 net/socket.c:662 sock_close+0x1c/0x30 net/socket.c:1455 __fput+0x402/0xb70 fs/file_table.c:468 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x130 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3b4d58f6c9 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:00007f3b4e423038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f3b4d7e5fa0 RCX: 00007f3b4d58f6c9 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000002 RBP: 00007f3b4d611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3b4d7e6038 R14: 00007f3b4d7e5fa0 R15: 00007ffe23df93c8 --- This report is generated by a bot. 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