yz1> rejected, already enabled Enabling of bearer rejected, already enabled Enabling of bearer rejected, already enabled INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.0.0-rc6+ #85 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'loop3' (0000000097fbc7a5): kobject_uevent_env Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 assign_lock_key kernel/locking/lockdep.c:731 [inline] register_lock_class+0x1bdc/0x1bf0 kernel/locking/lockdep.c:757 kobject: 'loop3' (0000000097fbc7a5): fill_kobj_path: path = '/devices/virtual/block/loop3' Enabling of bearer rejected, already enabled kobject: 'loop1' (00000000002958cc): kobject_uevent_env __lock_acquire+0x11f/0x4700 kernel/locking/lockdep.c:3224 kobject: 'loop1' (00000000002958cc): fill_kobj_path: path = '/devices/virtual/block/loop1' Enabling of bearer rejected, already enabled lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 __raw_spin_trylock include/linux/spinlock_api_smp.h:90 [inline] _raw_spin_trylock+0x62/0x80 kernel/locking/spinlock.c:128 spin_trylock include/linux/spinlock.h:339 [inline] icmp_xmit_lock net/ipv4/icmp.c:219 [inline] icmp_send+0x54c/0x1400 net/ipv4/icmp.c:665 Enabling of bearer rejected, already enabled Enabling of bearer rejected, already enabled kobject: 'loop1' (00000000002958cc): kobject_uevent_env kobject: 'loop1' (00000000002958cc): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000f3660826): kobject_uevent_env __udp4_lib_rcv+0x1fb2/0x2c50 net/ipv4/udp.c:2321 Enabling of bearer rejected, already enabled udp_rcv+0x22/0x30 net/ipv4/udp.c:2480 ip_protocol_deliver_rcu+0x60/0x8e0 net/ipv4/ip_input.c:208 kobject: 'loop0' (00000000f3660826): fill_kobj_path: path = '/devices/virtual/block/loop0' ip_local_deliver_finish+0x23b/0x390 net/ipv4/ip_input.c:234 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_local_deliver+0x1e9/0x520 net/ipv4/ip_input.c:255 Enabling of bearer rejected, already enabled dst_input include/net/dst.h:450 [inline] ip_rcv_finish+0x1db/0x2f0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xe8/0x3f0 net/ipv4/ip_input.c:524 kobject: 'loop1' (00000000002958cc): kobject_uevent_env kobject: 'loop1' (00000000002958cc): fill_kobj_path: path = '/devices/virtual/block/loop1' __netif_receive_skb_one_core+0x115/0x1a0 net/core/dev.c:4973 Enabling of bearer rejected, already enabled __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083 process_backlog+0x206/0x750 net/core/dev.c:5923 Enabling of bearer rejected, already enabled napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x4fa/0x1070 net/core/dev.c:6412 kobject: 'loop1' (00000000002958cc): kobject_uevent_env kobject: 'loop1' (00000000002958cc): fill_kobj_path: path = '/devices/virtual/block/loop1' __do_softirq+0x266/0x95a kernel/softirq.c:292 Enabling of bearer rejected, already enabled run_ksoftirqd kernel/softirq.c:654 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:646 smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164 Enabling of bearer rejected, already enabled kthread+0x357/0x430 kernel/kthread.c:246 Enabling of bearer rejected, already enabled ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 kasan: CONFIG_KASAN_INLINE enabled kobject: 'loop1' (00000000002958cc): kobject_uevent_env kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.0.0-rc6+ #85 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'loop1' (00000000002958cc): fill_kobj_path: path = '/devices/virtual/block/loop1' RIP: 0010:__ip_append_data.isra.0+0x2e6/0x2dd0 net/ipv4/ip_output.c:898 Code: c7 85 cc fe ff ff 00 00 00 00 0f 85 28 13 00 00 e8 1f c4 9b fb 48 8b 95 38 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 73 28 00 00 48 8b 85 38 ff ff ff 48 8b 18 48 b8 RSP: 0018:ffff8880a98df2c0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85d41c71 Enabling of bearer rejected, already enabled RDX: 0000000000000000 RSI: ffffffff85d41cf1 RDI: 0000000000000001 RBP: ffff8880a98df430 R08: ffff8880a98d0440 R09: ffffffff85e47420 R10: ffff8880a98df5a0 R11: ffff8880a14b6743 R12: ffff888093da7070 R13: ffff888093da7510 R14: 0000000000000000 R15: dead4ead00000000 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Enabling of bearer rejected, already enabled CR2: 000000000073c000 CR3: 00000000a993a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop3' (0000000097fbc7a5): kobject_uevent_env Call Trace: kobject: 'loop3' (0000000097fbc7a5): fill_kobj_path: path = '/devices/virtual/block/loop3' ip_append_data.part.0+0xf2/0x170 net/ipv4/ip_output.c:1220 Enabling of bearer rejected, already enabled Enabling of bearer rejected, already enabled ip_append_data+0x6e/0x90 net/ipv4/ip_output.c:1209 icmp_push_reply+0x189/0x510 net/ipv4/icmp.c:375 icmp_send+0xaac/0x1400 net/ipv4/icmp.c:736 Enabling of bearer rejected, already enabled Enabling of bearer rejected, already enabled kobject: 'loop0' (00000000f3660826): kobject_uevent_env Enabling of bearer rejected, already enabled __udp4_lib_rcv+0x1fb2/0x2c50 net/ipv4/udp.c:2321 kobject: 'loop0' (00000000f3660826): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000ff59d477): kobject_uevent_env udp_rcv+0x22/0x30 net/ipv4/udp.c:2480 kobject: 'loop4' (00000000ff59d477): fill_kobj_path: path = '/devices/virtual/block/loop4' ip_protocol_deliver_rcu+0x60/0x8e0 net/ipv4/ip_input.c:208 kobject: 'loop2' (000000000a7f8320): kobject_uevent_env kobject: 'loop2' (000000000a7f8320): fill_kobj_path: path = '/devices/virtual/block/loop2' ip_local_deliver_finish+0x23b/0x390 net/ipv4/ip_input.c:234 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_local_deliver+0x1e9/0x520 net/ipv4/ip_input.c:255 kobject: 'loop5' (00000000efac530b): kobject_uevent_env Enabling of bearer rejected, already enabled dst_input include/net/dst.h:450 [inline] ip_rcv_finish+0x1db/0x2f0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip_rcv+0xe8/0x3f0 net/ipv4/ip_input.c:524 kobject: 'loop5' (00000000efac530b): fill_kobj_path: path = '/devices/virtual/block/loop5' Enabling of bearer rejected, already enabled __netif_receive_skb_one_core+0x115/0x1a0 net/core/dev.c:4973 Enabling of bearer rejected, already enabled __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083 process_backlog+0x206/0x750 net/core/dev.c:5923 Enabling of bearer rejected, already enabled kobject: 'loop1' (00000000002958cc): kobject_uevent_env napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x4fa/0x1070 net/core/dev.c:6412 Enabling of bearer rejected, already enabled __do_softirq+0x266/0x95a kernel/softirq.c:292 Enabling of bearer rejected, already enabled run_ksoftirqd kernel/softirq.c:654 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:646 smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164 kobject: 'loop1' (00000000002958cc): fill_kobj_path: path = '/devices/virtual/block/loop1' kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Enabling of bearer rejected, already enabled Modules linked in: ---[ end trace 21ae4017b7edd64a ]--- Enabling of bearer rejected, already enabled RIP: 0010:__ip_append_data.isra.0+0x2e6/0x2dd0 net/ipv4/ip_output.c:898 Code: c7 85 cc fe ff ff 00 00 00 00 0f 85 28 13 00 00 e8 1f c4 9b fb 48 8b 95 38 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 73 28 00 00 48 8b 85 38 ff ff ff 48 8b 18 48 b8 RSP: 0018:ffff8880a98df2c0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85d41c71 RDX: 0000000000000000 RSI: ffffffff85d41cf1 RDI: 0000000000000001 RBP: ffff8880a98df430 R08: ffff8880a98d0440 R09: ffffffff85e47420 Enabling of bearer rejected, already enabled R10: ffff8880a98df5a0 R11: ffff8880a14b6743 R12: ffff888093da7070 R13: ffff888093da7510 R14: 0000000000000000 R15: dead4ead00000000 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 kobject: 'loop5' (00000000efac530b): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000073c000 CR3: 00000000a993a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400