IPVS: ftp: loaded support on port[0] = 21 kasan: CONFIG_KASAN_INLINE enabled BUG: unable to handle kernel paging request at ffff8884fc24c9f0 kasan: GPF could be caused by NULL-ptr deref or user memory access #PF error: [normal kernel read fault] PGD c201067 P4D c201067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 12568 Comm: syz-executor3 Not tainted 4.20.0+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:55 Code: 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe RSP: 0018:ffff888052bf7190 EFLAGS: 00010016 RAX: ffffe8ffffc06f30 RBX: ffffe8ffffc06f20 RCX: 00000000000001e0 RDX: 00000000000001e0 RSI: ffff8884fc24c9f0 RDI: ffffe8ffffc06f30 RBP: ffff888052bf71b0 R08: 1ffff1100a57ee25 R09: 000000000000003c R10: ffffed100a57ee25 R11: 0000000000000003 R12: 000000000000003c R13: ffff8880a9400b80 R14: ffff8880aa1691c0 R15: ffffe8ffffc06f20 FS: 00007fe856aca700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8884fc24c9f0 CR3: 00000000832c7000 CR4: 00000000001426f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: cache_alloc_refill mm/slab.c:2998 [inline] ____cache_alloc mm/slab.c:3114 [inline] ____cache_alloc mm/slab.c:3097 [inline] __do_cache_alloc mm/slab.c:3336 [inline] slab_alloc mm/slab.c:3371 [inline] kmem_cache_alloc+0x418/0x710 mm/slab.c:3539 kmem_cache_zalloc include/linux/slab.h:730 [inline] __kernfs_new_node+0xfe/0x8a0 fs/kernfs/dir.c:634 kernfs_new_node+0x99/0x130 fs/kernfs/dir.c:695 __kernfs_create_file+0x51/0x340 fs/kernfs/file.c:991 sysfs_add_file_mode_ns+0x222/0x560 fs/sysfs/file.c:306 create_files fs/sysfs/group.c:63 [inline] internal_create_group+0x3d2/0xd70 fs/sysfs/group.c:147 sysfs_create_group fs/sysfs/group.c:173 [inline] sysfs_create_groups fs/sysfs/group.c:200 [inline] sysfs_create_groups+0x9b/0x141 fs/sysfs/group.c:190 device_add_groups drivers/base/core.c:1143 [inline] device_add_attrs drivers/base/core.c:1291 [inline] device_add+0x83e/0x1800 drivers/base/core.c:1930 netdev_register_kobject+0x18c/0x390 net/core/net-sysfs.c:1751 register_netdevice+0x8e1/0x10b0 net/core/dev.c:8629 register_netdev+0x30/0x50 net/core/dev.c:8744 vti6_init_net+0x664/0xa10 net/ipv6/ip6_vti.c:1126 ops_init+0x109/0x5d0 net/core/net_namespace.c:129 setup_net+0x326/0x8c0 net/core/net_namespace.c:314 copy_net_ns+0x2ae/0x4b0 net/core/net_namespace.c:437 create_new_namespaces+0x4ce/0x930 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206 ksys_unshare+0x6d7/0xfb0 kernel/fork.c:2545 __do_sys_unshare kernel/fork.c:2613 [inline] __se_sys_unshare kernel/fork.c:2611 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2611 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe856ac9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe856aca6d4 R13: 00000000004c6958 R14: 00000000004dbad0 R15: 00000000ffffffff Modules linked in: CR2: ffff8884fc24c9f0 ---[ end trace 49d4a09cbc8b9335 ]--- general protection fault: 0000 [#2] PREEMPT SMP KASAN CPU: 1 PID: -1812737848 Comm:  Tainted: G D 4.20.0+ #1 RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Code: 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe RIP: 0010:__read_once_size include/linux/compiler.h:191 [inline] RIP: 0010:get_running_cputimer include/linux/sched/cputime.h:85 [inline] RIP: 0010:account_group_system_time include/linux/sched/cputime.h:149 [inline] RIP: 0010:account_system_index_time+0xe8/0x5f0 kernel/sched/cputime.c:168 RSP: 0018:ffff888052bf7190 EFLAGS: 00010016 Code: 04 00 00 49 8b 84 24 00 07 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d b8 40 01 00 00 48 8d 88 28 01 00 00 48 89 fe 48 c1 ee 03 <0f> b6 14 16 48 89 fe 83 e6 07 40 38 f2 7f 08 84 d2 0f 85 93 03 00 RAX: ffffe8ffffc06f30 RBX: ffffe8ffffc06f20 RCX: 00000000000001e0 RSP: 0018:ffff8880ae707a80 EFLAGS: 00010006 RDX: 00000000000001e0 RSI: ffff8884fc24c9f0 RDI: ffffe8ffffc06f30 RAX: 0000000000000000 RBX: 1ffff11015ce0f54 RCX: 0000000000000128 RDX: dffffc0000000000 RSI: 0000000000000028 RDI: 0000000000000140 RBP: ffff888052bf71b0 R08: 1ffff1100a57ee25 R09: 000000000000003c RBP: ffff8880ae707b48 R08: ffff8880ae71f5f0 R09: ffffffff8a99c05d R10: ffffffff8a99c050 R11: 0000000000000001 R12: ffff8880a94be440 R10: ffffed100a57ee25 R11: 0000000000000003 R12: 000000000000003c R13: 0000000000490047 R14: 0000000000000003 R15: ffff8880ae707b20 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 R13: ffff8880a9400b80 R14: ffff8880aa1691c0 R15: ffffe8ffffc06f20 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000068 CR3: 000000008ded9000 CR4: 00000000001426e0 FS: 00007fe856aca700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: CR2: ffff8884fc24c9f0 CR3: 00000000832c7000 CR4: 00000000001426f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600