INFO: task kworker/u4:1:11 blocked for more than 143 seconds. Not tainted 6.0.0-rc6-syzkaller-00009-g60891ec99e14 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:1 state:D stack:20032 pid: 11 ppid: 2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6494 schedule+0xcb/0x190 kernel/sched/core.c:6570 exp_funnel_lock kernel/rcu/tree_exp.h:315 [inline] synchronize_rcu_expedited+0x6b0/0x770 kernel/rcu/tree_exp.h:940 synchronize_rcu+0x1dc/0x350 kernel/rcu/tree.c:3519 cleanup_net+0x6b2/0xc50 net/core/net_namespace.c:591 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 INFO: task syz-executor.5:16270 blocked for more than 143 seconds. Not tainted 6.0.0-rc6-syzkaller-00009-g60891ec99e14 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:26688 pid:16270 ppid: 9307 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6494 schedule+0xcb/0x190 kernel/sched/core.c:6570 schedule_timeout+0xac/0x300 kernel/time/timer.c:1911 do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x46/0x60 kernel/sched/completion.c:138 __flush_work+0x135/0x1b0 kernel/workqueue.c:3075 p9_mux_poll_stop net/9p/trans_fd.c:175 [inline] p9_conn_destroy net/9p/trans_fd.c:884 [inline] p9_fd_close+0x241/0x410 net/9p/trans_fd.c:920 p9_client_create+0xa16/0x1030 net/9p/client.c:1001 v9fs_session_init+0x1e3/0x1990 fs/9p/v9fs.c:408 v9fs_mount+0xd2/0xcb0 fs/9p/vfs_super.c:126 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f377e489409 RSP: 002b:00007f377d3fe168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f377e59bf80 RCX: 00007f377e489409 RDX: 0000000020000040 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00007f377e4e4367 R08: 0000000020000280 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd06c7364f R14: 00007f377d3fe300 R15: 0000000000022000 INFO: task syz-executor.4:16271 blocked for more than 144 seconds. Not tainted 6.0.0-rc6-syzkaller-00009-g60891ec99e14 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27360 pid:16271 ppid: 3626 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6494 schedule+0xcb/0x190 kernel/sched/core.c:6570 synchronize_rcu_expedited+0x5f1/0x770 kernel/rcu/tree_exp.h:955 bdi_remove_from_list mm/backing-dev.c:928 [inline] bdi_unregister+0x18c/0x610 mm/backing-dev.c:936 del_gendisk+0x43c/0x9c0 block/genhd.c:614 loop_remove drivers/block/loop.c:2064 [inline] loop_control_remove drivers/block/loop.c:2119 [inline] loop_control_ioctl+0x5b9/0x770 drivers/block/loop.c:2157 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f56fb089409 RSP: 002b:00007f56fc249168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f56fb19bf80 RCX: 00007f56fb089409 RDX: 0000000000000007 RSI: 0000000000004c81 RDI: 0000000000000004 RBP: 00007f56fb0e4367 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3c5daaef R14: 00007f56fc249300 R15: 0000000000022000 INFO: task syz-executor.4:16277 blocked for more than 144 seconds. Not tainted 6.0.0-rc6-syzkaller-00009-g60891ec99e14 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26264 pid:16277 ppid: 3626 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6494 schedule+0xcb/0x190 kernel/sched/core.c:6570 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629 __mutex_lock_common+0xecf/0x26c0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] synchronize_rcu_expedited+0x369/0x770 kernel/rcu/tree_exp.h:940 bdi_remove_from_list mm/backing-dev.c:928 [inline] bdi_unregister+0x18c/0x610 mm/backing-dev.c:936 del_gendisk+0x43c/0x9c0 block/genhd.c:614 loop_remove drivers/block/loop.c:2064 [inline] loop_control_remove drivers/block/loop.c:2119 [inline] loop_control_ioctl+0x5b9/0x770 drivers/block/loop.c:2157 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f56fb089409 RSP: 002b:00007f56fc228168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f56fb19c050 RCX: 00007f56fb089409 RDX: 0000000000000008 RSI: 0000000000004c81 RDI: 0000000000000005 RBP: 00007f56fb0e4367 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3c5daaef R14: 00007f56fc228300 R15: 0000000000022000 INFO: task syz-executor.0:16294 blocked for more than 145 seconds. Not tainted 6.0.0-rc6-syzkaller-00009-g60891ec99e14 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:26688 pid:16294 ppid: 3622 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6494 schedule+0xcb/0x190 kernel/sched/core.c:6570 schedule_timeout+0xac/0x300 kernel/time/timer.c:1911 do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x46/0x60 kernel/sched/completion.c:138 __flush_work+0x135/0x1b0 kernel/workqueue.c:3075 p9_mux_poll_stop net/9p/trans_fd.c:175 [inline] p9_conn_destroy net/9p/trans_fd.c:884 [inline] p9_fd_close+0x241/0x410 net/9p/trans_fd.c:920 p9_client_create+0xa16/0x1030 net/9p/client.c:1001 v9fs_session_init+0x1e3/0x1990 fs/9p/v9fs.c:408 v9fs_mount+0xd2/0xcb0 fs/9p/vfs_super.c:126 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe423489409 RSP: 002b:00007fe424691168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fe42359bf80 RCX: 00007fe423489409 RDX: 0000000020000040 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00007fe4234e4367 R08: 0000000020000280 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc90f7e0bf R14: 00007fe424691300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:1/11: #0: ffff8880121c2938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc90000107d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 #2: ffffffff8ddcaa50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc50 net/core/net_namespace.c:557 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8cd20a70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8cd21270 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 3 locks held by kworker/0:1/14: 2 locks held by kworker/1:0/22: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc900001c7d00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 1 lock held by khungtaskd/28: #0: ffffffff8cd208a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by khugepaged/34: #0: ffffffff8cdc4068 (lock#4){+.+.}-{3:3}, at: __lru_add_drain_all+0x66/0x850 mm/swap.c:830 2 locks held by kworker/u4:3/47: #0: ffff8880b9a39c18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:544 #1: ffff8880b9a27748 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x5b1/0x8a0 kernel/sched/psi.c:885 2 locks held by getty/3287: #0: ffff88814a9fb098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177 2 locks held by kworker/1:7/3682: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc9000462fd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:11/7026: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc9000b247d00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:21/7093: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc9001468fd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:22/7094: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc9001469fd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:23/7095: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc900146afd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:24/7096: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc900146bfd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:25/7097: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc900146cfd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:1/13422: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc9000353fd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:3/13975: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc90009a9fd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 3 locks held by kworker/1:4/14334: #0: ffff888026ce0138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc90002bffd00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 #2: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x15/0x30 net/ipv6/addrconf.c:4624 2 locks held by kworker/1:5/14635: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc900040cfd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 3 locks held by kworker/1:8/14637: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc90004137d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 #2: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:263 2 locks held by kworker/1:10/14640: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc90004167d00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:12/14642: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc90004187d00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:13/14643: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc90004197d00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:15/14645: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc900040dfd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by kworker/1:16/14646: #0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc900041a7d00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 1 lock held by syz-executor.4/16271: #0: ffffffff8cd25e78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline] #0: ffffffff8cd25e78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2a4/0x770 kernel/rcu/tree_exp.h:940 1 lock held by syz-executor.4/16277: #0: ffffffff8cd25e78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #0: ffffffff8cd25e78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x369/0x770 kernel/rcu/tree_exp.h:940 1 lock held by syz-executor.4/16332: #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x772/0xeb0 net/core/rtnetlink.c:6087 2 locks held by syz-executor.2/16339: #0: ffffffff8ddcaa50 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x33d/0x5b0 net/core/net_namespace.c:468 #1: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:804 [inline] #1: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x173/0x420 net/smc/smc_pnet.c:873 2 locks held by syz-executor.3/16340: #0: ffffffff8ddcaa50 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x33d/0x5b0 net/core/net_namespace.c:468 #1: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:804 [inline] #1: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x173/0x420 net/smc/smc_pnet.c:873 1 lock held by syz-executor.0/16344: #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x772/0xeb0 net/core/rtnetlink.c:6087 1 lock held by dhcpcd/16346: #0: ffff88804b826130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1712 [inline] #0: ffff88804b826130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2a/0xce0 net/packet/af_packet.c:3194 1 lock held by dhcpcd/16347: #0: ffff888055904130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1712 [inline] #0: ffff888055904130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2a/0xce0 net/packet/af_packet.c:3194 1 lock held by dhcpcd/16348: #0: ffff88807b3ec130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1712 [inline] #0: ffff88807b3ec130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2a/0xce0 net/packet/af_packet.c:3194 1 lock held by dhcpcd/16349: #0: ffff88805a3dc130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1712 [inline] #0: ffff88805a3dc130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2a/0xce0 net/packet/af_packet.c:3194 1 lock held by dhcpcd/16350: #0: ffff8880784b4130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1712 [inline] #0: ffff8880784b4130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2a/0xce0 net/packet/af_packet.c:3194 1 lock held by dhcpcd/16351: #0: ffff88804b76a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1712 [inline] #0: ffff88804b76a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2a/0xce0 net/packet/af_packet.c:3194 1 lock held by syz-executor.1/16367: #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x772/0xeb0 net/core/rtnetlink.c:6087 1 lock held by syz-executor.2/16373: #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x772/0xeb0 net/core/rtnetlink.c:6087 1 lock held by syz-executor.3/16374: #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x772/0xeb0 net/core/rtnetlink.c:6087 1 lock held by syz-executor.4/16384: #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x772/0xeb0 net/core/rtnetlink.c:6087 1 lock held by syz-executor.5/16397: #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffffffff8ddd6de8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x772/0xeb0 net/core/rtnetlink.c:6087 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc6-syzkaller-00009-g60891ec99e14 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x47c/0x4b0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x169/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xcd5/0xd20 kernel/hung_task.c:369 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 6.0.0-rc6-syzkaller-00009-g60891ec99e14 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Workqueue: bat_events batadv_nc_worker RIP: 0010:hlock_class kernel/locking/lockdep.c:222 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4728 [inline] RIP: 0010:__lock_acquire+0x512/0x1f60 kernel/locking/lockdep.c:5003 Code: df 4c 8b 7c 24 30 48 81 c3 b8 00 00 00 48 89 d8 48 c1 e8 03 8a 04 10 84 c0 0f 85 c8 12 00 00 44 8a 33 48 8b 44 24 18 8a 04 10 <84> c0 0f 85 d9 12 00 00 41 8b 1f 81 e3 ff 1f 00 00 48 89 d8 48 c1 RSP: 0018:ffffc900000d7988 EFLAGS: 00000046 RAX: 1ffff11002467c00 RBX: ffffffff8fc9ad38 RCX: ffffffff81695680 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff8ffa3040 RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff4609 R10: fffffbfff1ff4609 R11: 1ffffffff1ff4608 R12: 0000000000000000 R13: ffff88801233d880 R14: 0000000000020002 R15: ffff88801233e368 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000564b7033b0b0 CR3: 000000000ca8e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5666 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:280 rcu_read_lock include/linux/rcupdate.h:706 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0xc8/0x5b0 net/batman-adv/network-coding.c:719 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30