rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5189/1:b..l P12/1:b..l P16791/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=75473, q=294 ncpus=2)
task:modprobe        state:R  running task     stack:23904 pid:16791 tgid:16791 ppid:5968   task_flags:0x400000 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0x1585/0x5310 kernel/sched/core.c:6907
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872
Code: e9 30 ff ff ff e8 55 54 0c 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 d1 d1 79 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 5e 03 73
RSP: 0018:ffffc9000cab6fb8 EFLAGS: 00000286
RAX: 9e0d371518fe9400 RBX: 0000000000000246 RCX: 0000000000000046
RDX: 00000000bfd0b3df RSI: ffffffff8e15d4e2 RDI: ffffffff8c277400
RBP: 0000000000000000 R08: ffffffff81768a45 R09: ffffffff8e760320
R10: ffffc9000cab7118 R11: ffffffff81b0c240 R12: 0000000000000002
R13: ffffffff8e760320 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
 unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:165
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1432 [inline]
 __free_frozen_pages+0xc01/0xd80 mm/page_alloc.c:2972
 __slab_free+0x263/0x2b0 mm/slub.c:5487
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4456 [inline]
 slab_alloc_node mm/slub.c:4785 [inline]
 __do_kmalloc_node mm/slub.c:5173 [inline]
 __kmalloc_noprof+0x316/0x760 mm/slub.c:5186
 kmalloc_noprof include/linux/slab.h:966 [inline]
 tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_check_open_permission+0x229/0x470 security/tomoyo/file.c:776
 security_file_open+0xa9/0x240 security/security.c:2636
 do_dentry_open+0x384/0x14e0 fs/open.c:926
 vfs_open+0x3b/0x340 fs/open.c:1081
 do_open fs/namei.c:4671 [inline]
 path_openat+0x2e08/0x3860 fs/namei.c:4830
 do_file_open+0x23e/0x4a0 fs/namei.c:4859
 do_sys_openat2+0x113/0x200 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0db30d70ba
RSP: 002b:00007ffd2e207dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffd2e207e40 RCX: 00007f0db30d70ba
RDX: 0000000000080000 RSI: 00007ffd2e207e40 RDI: 00000000ffffff9c
RBP: 00007ffd2e207e30 R08: 00007ffd2e208037 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000016
R13: 00007f0db30ab000 R14: 00007ffd2e208050 R15: 0000000000000000
 </TASK>
task:kworker/u8:0    state:R  running task     stack:21376 pid:12    tgid:12    ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: krds_cp_wq#2/0 rds_connect_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0x1585/0x5310 kernel/sched/core.c:6907
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872
Code: e9 30 ff ff ff e8 55 54 0c 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 d1 d1 79 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 5e 03 73
RSP: 0018:ffffc90000117218 EFLAGS: 00000286
RAX: f5b38004fc1ed800 RBX: 0000000000000246 RCX: 0000000000000046
RDX: 0000000035df6404 RSI: ffffffff8e15d4e2 RDI: ffffffff8c277400
RBP: 0000000000000000 R08: ffffffff81768a45 R09: ffffffff8e760320
R10: ffffc90000117378 R11: ffffffff81b0c240 R12: 0000000000000002
R13: ffffffff8e760320 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
 unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:165
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1432 [inline]
 __free_frozen_pages+0xc01/0xd80 mm/page_alloc.c:2972
 __slab_free+0x263/0x2b0 mm/slub.c:5487
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:406
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5174 [inline]
 __kmalloc_noprof+0x35c/0x760 mm/slub.c:5186
 kmalloc_noprof include/linux/slab.h:966 [inline]
 kzalloc_noprof include/linux/slab.h:1204 [inline]
 lsm_blob_alloc security/security.c:192 [inline]
 lsm_sock_alloc security/security.c:4375 [inline]
 security_sk_alloc+0x52/0x360 security/security.c:4391
 sk_prot_alloc+0x101/0x210 net/core/sock.c:2248
 sk_alloc+0x3a/0x390 net/core/sock.c:2301
 inet_create+0x7a0/0x1000 net/ipv4/af_inet.c:328
 __sock_create+0x4e3/0x960 net/socket.c:1620
 rds_tcp_conn_path_connect+0x2d7/0x930 net/rds/tcp_connect.c:-1
 rds_connect_worker+0x1d8/0x290 net/rds/threads.c:176
 process_one_work+0x949/0x1650 kernel/workqueue.c:3279
 process_scheduled_works kernel/workqueue.c:3362 [inline]
 worker_thread+0xb46/0x1140 kernel/workqueue.c:3443
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
task:udevd           state:R  running task     stack:23328 pid:5189  tgid:5189  ppid:1      task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0x1585/0x5310 kernel/sched/core.c:6907
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__module_address+0x0/0x3e0 kernel/module/main.c:3823
Code: 8c 46 ff ff ff 4c 89 ff 49 89 c5 e8 5a 57 80 00 4c 89 e8 e9 33 ff ff ff 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <0f> 1f 40 d6 41 57 41 56 41 55 41 54 53 48 3b 3d cc e0 91 0c 0f 82
RSP: 0018:ffffc90003127778 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff81af366d RCX: 0000000080000001
RDX: 00000000c0065176 RSI: ffffffff8c2773e0 RDI: 00007f471b511b0a
RBP: 0000000000000001 R08: ffffffff81af366d R09: ffffffff8e760320
R10: ffffc90003127858 R11: ffffffff81b0c240 R12: ffff88807c69bc80
R13: 1ffff1100f8d3846 R14: 00007f471b511b0a R15: 1ffff92000624f0a
 __module_text_address kernel/module/main.c:3882 [inline]
 is_module_text_address+0x88/0x1e0 kernel/module/main.c:3857
 kernel_text_address+0x94/0xe0 kernel/extable.c:119
 __kernel_text_address+0xd/0x30 kernel/extable.c:79
 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385
 arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:165
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1432 [inline]
 __free_frozen_pages+0xc01/0xd80 mm/page_alloc.c:2972
 __slab_free+0x263/0x2b0 mm/slub.c:5487
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4456 [inline]
 slab_alloc_node mm/slub.c:4785 [inline]
 kmem_cache_alloc_noprof+0x2bc/0x650 mm/slub.c:4792
 alloc_filename fs/namei.c:142 [inline]
 do_getname+0x2e/0x250 fs/namei.c:182
 getname include/linux/fs.h:2512 [inline]
 getname_maybe_null include/linux/fs.h:2519 [inline]
 class_filename_maybe_null_constructor include/linux/fs.h:2543 [inline]
 vfs_fstatat+0x45/0x170 fs/stat.c:368
 __do_sys_newfstatat fs/stat.c:538 [inline]
 __se_sys_newfstatat fs/stat.c:532 [inline]
 __x64_sys_newfstatat+0x151/0x200 fs/stat.c:532
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f471b511b0a
RSP: 002b:00007ffeaf4da298 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00005622a5fbe420 RCX: 00007f471b511b0a
RDX: 00007ffeaf4da2a0 RSI: 00005622a5facef3 RDI: 00000000ffffff9c
RBP: 00005622a837a148 R08: 00063478c1c69200 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffeaf4da2a0 R14: 0000000000000000 R15: 00063478c1c69200
 </TASK>