IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 ================================================================== BUG: KASAN: use-after-free in xfrm6_tunnel_free_spi net/ipv6/xfrm6_tunnel.c:208 [inline] BUG: KASAN: use-after-free in xfrm6_tunnel_destroy+0x52e/0x5d0 net/ipv6/xfrm6_tunnel.c:303 Read of size 8 at addr ffff888089d416b8 by task kworker/1:2/2559 CPU: 1 PID: 2559 Comm: kworker/1:2 Not tainted 4.14.151 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events xfrm_state_gc_task Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x197 lib/dump_stack.c:53 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430 xfrm6_tunnel_free_spi net/ipv6/xfrm6_tunnel.c:208 [inline] xfrm6_tunnel_destroy+0x52e/0x5d0 net/ipv6/xfrm6_tunnel.c:303 xfrm_state_gc_destroy net/xfrm/xfrm_state.c:449 [inline] xfrm_state_gc_task+0x3ea/0x650 net/xfrm/xfrm_state.c:470 process_one_work+0x863/0x1600 kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Allocated by task 6866: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529 __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x15d/0x7a0 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] kzalloc include/linux/slab.h:661 [inline] ops_init+0xeb/0x3d0 net/core/net_namespace.c:108 setup_net+0x237/0x530 net/core/net_namespace.c:295 copy_net_ns+0x19f/0x440 net/core/net_namespace.c:419 create_new_namespaces+0x37b/0x720 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xab/0x1e0 kernel/nsproxy.c:206 SYSC_unshare kernel/fork.c:2406 [inline] SyS_unshare+0x2f3/0x7e0 kernel/fork.c:2356 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 Freed by task 5: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xcc/0x270 mm/slab.c:3815 ops_free net/core/net_namespace.c:132 [inline] ops_free_list.part.0+0x1f6/0x320 net/core/net_namespace.c:154 ops_free_list net/core/net_namespace.c:152 [inline] cleanup_net+0x458/0x880 net/core/net_namespace.c:488 process_one_work+0x863/0x1600 kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 The buggy address belongs to the object at ffff888089d41600 which belongs to the cache kmalloc-8192 of size 8192 The buggy address is located 184 bytes inside of 8192-byte region [ffff888089d41600, ffff888089d43600) The buggy address belongs to the page: page:ffffea0002275000 count:1 mapcount:0 mapping:ffff888089d41600 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000008100(slab|head) raw: 01fffc0000008100 ffff888089d41600 0000000000000000 0000000100000001 raw: ffffea0002a1d320 ffffea0002224020 ffff8880aa802080 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888089d41580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888089d41600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888089d41680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888089d41700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888089d41780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================