INFO: task kworker/u4:5:204 blocked for more than 143 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:5 state:D stack:24048 pid: 204 ppid: 2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8cd/0x2150 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 cangw_pernet_exit+0xe/0x20 net/can/gw.c:1241 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:187 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:604 process_one_work+0x933/0x15a0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task syz-executor.4:27873 blocked for more than 143 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27544 pid:27873 ppid: 8525 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8cd/0x2150 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 ib_get_eth_speed+0xeb/0x5c0 drivers/infiniband/core/verbs.c:1811 rxe_query_port+0x13d/0x2d0 drivers/infiniband/sw/rxe/rxe_verbs.c:41 __ib_query_port drivers/infiniband/core/device.c:2017 [inline] ib_query_port drivers/infiniband/core/device.c:2052 [inline] ib_query_port+0x4d9/0x9e0 drivers/infiniband/core/device.c:2042 add_port drivers/infiniband/core/sysfs.c:1052 [inline] ib_setup_port_attrs+0x1ee/0x14f0 drivers/infiniband/core/sysfs.c:1367 add_one_compat_dev+0x4ab/0x800 drivers/infiniband/core/device.c:917 rdma_dev_init_net+0x2dc/0x480 drivers/infiniband/core/device.c:1133 ops_init+0xaf/0x470 net/core/net_namespace.c:152 setup_net+0x2de/0x850 net/core/net_namespace.c:342 copy_net_ns+0x31e/0x760 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x8e0 kernel/fork.c:2957 __do_sys_unshare kernel/fork.c:3025 [inline] __se_sys_unshare kernel/fork.c:3023 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3023 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e149 RSP: 002b:00007f53c19f1c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045e149 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 000000000119bfb0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007fff90eec1cf R14: 00007f53c19f29c0 R15: 000000000119bf8c INFO: task syz-executor.4:27899 blocked for more than 144 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28504 pid:27899 ppid: 8525 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8cd/0x2150 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 smc_pnet_create_pnetids_list net/smc/smc_pnet.c:799 [inline] smc_pnet_net_init+0x245/0x400 net/smc/smc_pnet.c:868 ops_init+0xaf/0x470 net/core/net_namespace.c:152 setup_net+0x2de/0x850 net/core/net_namespace.c:342 copy_net_ns+0x31e/0x760 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x8e0 kernel/fork.c:2957 __do_sys_unshare kernel/fork.c:3025 [inline] __se_sys_unshare kernel/fork.c:3023 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3023 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e149 RSP: 002b:00007f53c19afc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045e149 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 000000000119c100 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007fff90eec1cf R14: 00007f53c19b09c0 R15: 000000000119c0dc INFO: task syz-executor.1:27888 blocked for more than 144 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28152 pid:27888 ppid: 8519 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8cd/0x2150 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 smc_pnet_create_pnetids_list net/smc/smc_pnet.c:799 [inline] smc_pnet_net_init+0x245/0x400 net/smc/smc_pnet.c:868 ops_init+0xaf/0x470 net/core/net_namespace.c:152 setup_net+0x2de/0x850 net/core/net_namespace.c:342 copy_net_ns+0x31e/0x760 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x8e0 kernel/fork.c:2957 __do_sys_unshare kernel/fork.c:3025 [inline] __se_sys_unshare kernel/fork.c:3023 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3023 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e149 RSP: 002b:00007f33cfab2c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045e149 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040020000 RBP: 000000000119bfb0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffca065223f R14: 00007f33cfab39c0 R15: 000000000119bf8c INFO: task syz-executor.1:27898 blocked for more than 145 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28008 pid:27898 ppid: 8519 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8cd/0x2150 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 smc_pnet_create_pnetids_list net/smc/smc_pnet.c:799 [inline] smc_pnet_net_init+0x245/0x400 net/smc/smc_pnet.c:868 ops_init+0xaf/0x470 net/core/net_namespace.c:152 setup_net+0x2de/0x850 net/core/net_namespace.c:342 copy_net_ns+0x31e/0x760 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x8e0 kernel/fork.c:2957 __do_sys_unshare kernel/fork.c:3025 [inline] __se_sys_unshare kernel/fork.c:3023 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3023 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e149 RSP: 002b:00007f33cfa70c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045e149 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040020000 RBP: 000000000119c100 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007ffca065223f R14: 00007f33cfa719c0 R15: 000000000119c0dc INFO: task syz-executor.2:27915 blocked for more than 145 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28528 pid:27915 ppid: 8521 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8cd/0x2150 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 sock_do_ioctl+0x1f2/0x2d0 net/socket.c:1050 sock_ioctl+0x477/0x6a0 net/socket.c:1177 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e149 RSP: 002b:00007fe7e2f2cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e149 RDX: 00000000200001c0 RSI: 0000001000008912 RDI: 0000000000000003 RBP: 000000000119c068 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034 R13: 00007fffe48f186f R14: 00007fe7e2f2d9c0 R15: 000000000119c034 INFO: task syz-executor.2:27917 blocked for more than 146 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27864 pid:27917 ppid: 8521 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8cd/0x2150 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 sock_do_ioctl+0x1f2/0x2d0 net/socket.c:1050 sock_ioctl+0x477/0x6a0 net/socket.c:1177 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e149 RSP: 002b:00007fe7e2f0bc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e149 RDX: 00000000200001c0 RSI: 0000001000008912 RDI: 0000000000000003 RBP: 000000000119c110 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007fffe48f186f R14: 00007fe7e2f0c9c0 R15: 000000000119c0dc INFO: task syz-executor.3:27933 blocked for more than 146 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28312 pid:27933 ppid: 8523 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8cd/0x2150 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5561 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2336 ___sys_sendmsg+0xf3/0x170 net/socket.c:2390 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2423 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e149 RSP: 002b:00007f0f72510c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e149 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffdd811793f R14: 00007f0f725119c0 R15: 000000000119bf8c INFO: task syz-executor.3:27945 blocked for more than 147 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27704 pid:27945 ppid: 8523 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8cd/0x2150 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5561 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2336 ___sys_sendmsg+0xf3/0x170 net/socket.c:2390 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2423 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e149 RSP: 002b:00007f0f724cec68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e149 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 000000000119c110 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007ffdd811793f R14: 00007f0f724cf9c0 R15: 000000000119c0dc Showing all locks held in the system: 4 locks held by kworker/u4:5/204: #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2246 #1: ffffc9000180fda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2250 #2: ffffffff8c923110 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:566 #3: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1241 1 lock held by khungtaskd/1663: #0: ffffffff8b33a020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254 1 lock held by in:imklog/8184: #0: ffff88801714bc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932 2 locks held by kworker/0:32/20370: #0: ffff8880b9e34c58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1318 [inline] #0: ffff8880b9e34c58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x2150 kernel/sched/core.c:4995 #1: ffff8880b9e20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 3 locks held by kworker/0:31/23214: #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2246 #1: ffffc90001d1fda8 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2250 #2: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74 3 locks held by kworker/1:14/25552: #0: ffff888020cad538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888020cad538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888020cad538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888020cad538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888020cad538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888020cad538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2246 #1: ffffc9000110fda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2250 #2: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4569 6 locks held by syz-executor.4/27873: #0: ffffffff8c923110 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:479 #1: ffffffff8c65bb10 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x25e/0x480 drivers/infiniband/core/device.c:1127 #2: ffffffff8c65b890 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x2d1/0x480 drivers/infiniband/core/device.c:1132 #3: ffff888029be4f70 (&device->compat_devs_mutex){+.+.}-{3:3}, at: add_one_compat_dev+0xea/0x800 drivers/infiniband/core/device.c:891 #4: ffff888029be51a8 (&rxe->usdev_lock){+.+.}-{3:3}, at: rxe_query_port+0x129/0x2d0 drivers/infiniband/sw/rxe/rxe_verbs.c:40 #5: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: ib_get_eth_speed+0xeb/0x5c0 drivers/infiniband/core/verbs.c:1811 2 locks held by syz-executor.4/27899: #0: ffffffff8c923110 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:479 #1: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:799 [inline] #1: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x245/0x400 net/smc/smc_pnet.c:868 2 locks held by syz-executor.1/27888: #0: ffffffff8c923110 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:479 #1: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:799 [inline] #1: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x245/0x400 net/smc/smc_pnet.c:868 2 locks held by syz-executor.1/27898: #0: ffffffff8c923110 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:479 #1: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:799 [inline] #1: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x245/0x400 net/smc/smc_pnet.c:868 1 lock held by syz-executor.5/27890: 1 lock held by syz-executor.2/27915: #0: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x1f2/0x2d0 net/socket.c:1050 1 lock held by syz-executor.2/27917: #0: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x1f2/0x2d0 net/socket.c:1050 1 lock held by syz-executor.3/27933: #0: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5561 1 lock held by syz-executor.3/27945: #0: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8c935348 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5561 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1663 Comm: khungtaskd Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd43/0xfa0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: kworker/u4:2 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet RIP: 0010:hlock_class kernel/locking/lockdep.c:210 [inline] RIP: 0010:mark_lock+0x105/0x1730 kernel/locking/lockdep.c:4389 Code: 0f b7 ed be 08 00 00 00 4c 89 e8 48 c1 f8 06 48 8d 3c c5 a0 87 bc 8e e8 a9 c1 5c 00 4c 0f a3 2d 01 5a 66 0d 0f 83 10 01 00 00 <4f> 8d 6c 6d 00 49 c1 e5 06 49 81 c5 c0 8b bc 8e 49 8d 7d 50 48 b8 RSP: 0018:ffffc90000e2f828 EFLAGS: 00000047 RAX: 0000000000000001 RBX: 1ffff920001c5f0b RCX: ffffffff81562d97 RDX: fffffbfff1d790f5 RSI: 0000000000000008 RDI: ffffffff8ebc87a0 RBP: ffff888010fc24c0 R08: 0000000000000000 R09: ffffffff8ebc87a7 R10: fffffbfff1d790f4 R11: 000000000000015b R12: 0000000000000009 R13: 000000000000002c R14: 0000000000000200 R15: ffff888010fc2448 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3983210000 CR3: 0000000025089000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_usage kernel/locking/lockdep.c:4332 [inline] __lock_acquire+0x8bb/0x5500 kernel/locking/lockdep.c:4786 lock_acquire kernel/locking/lockdep.c:5437 [inline] lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402 rcu_lock_acquire include/linux/rcupdate.h:253 [inline] rcu_read_lock include/linux/rcupdate.h:642 [inline] batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:754 [inline] batadv_iv_ogm_schedule_buff+0x5d0/0x1410 net/batman-adv/bat_iv_ogm.c:825 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:869 [inline] batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:862 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x5c8/0x800 net/batman-adv/bat_iv_ogm.c:1723 process_one_work+0x933/0x15a0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296