IPVS: Creating netns size=2536 id=5 IPVS: Creating netns size=2536 id=6 IPVS: Creating netns size=2536 id=7 IPVS: Creating netns size=2536 id=8 ================================================================== BUG: KASAN: use-after-free in xfrm6_tunnel_free_spi net/ipv6/xfrm6_tunnel.c:205 [inline] BUG: KASAN: use-after-free in xfrm6_tunnel_destroy+0x5b2/0x680 net/ipv6/xfrm6_tunnel.c:300 Read of size 8 at addr ffff8801c89a28f8 by task kworker/0:2/1831 CPU: 0 PID: 1831 Comm: kworker/0:2 Not tainted 4.9.118-g47b77b8 #72 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events xfrm_state_gc_task ffff8801ce26faa8 ffffffff81eb4b89 ffffea0007226800 ffff8801c89a28f8 0000000000000000 ffff8801c89a28f8 ffff8801bd228a04 ffff8801ce26fae0 ffffffff81567f29 ffff8801c89a28f8 0000000000000008 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_address_description+0x6c/0x234 mm/kasan/report.c:256 [] kasan_report_error mm/kasan/report.c:355 [inline] [] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412 [] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 [] xfrm6_tunnel_free_spi net/ipv6/xfrm6_tunnel.c:205 [inline] [] xfrm6_tunnel_destroy+0x5b2/0x680 net/ipv6/xfrm6_tunnel.c:300 [] xfrm_state_gc_destroy net/xfrm/xfrm_state.c:368 [inline] [] xfrm_state_gc_task+0x3ad/0x510 net/xfrm/xfrm_state.c:388 [] process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092 [] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Allocated by task 3824: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:505 set_track mm/kasan/kasan.c:517 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:609 __kmalloc+0x11d/0x300 mm/slub.c:3741 kmalloc include/linux/slab.h:495 [inline] kzalloc include/linux/slab.h:636 [inline] ops_init+0xeb/0x380 net/core/net_namespace.c:101 setup_net+0x1b9/0x3f0 net/core/net_namespace.c:291 copy_net_ns+0x189/0x290 net/core/net_namespace.c:408 create_new_namespaces+0x51c/0x730 kernel/nsproxy.c:106 unshare_nsproxy_namespaces+0xa5/0x1d0 kernel/nsproxy.c:205 SYSC_unshare kernel/fork.c:2251 [inline] SyS_unshare+0x319/0x710 kernel/fork.c:2201 do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 entry_SYSCALL_64_after_swapgs+0x5d/0xdb Freed by task 1615: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:505 set_track mm/kasan/kasan.c:517 [inline] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:582 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xfb/0x310 mm/slub.c:3878 ops_free net/core/net_namespace.c:126 [inline] ops_free_list.part.10+0x1ff/0x330 net/core/net_namespace.c:148 ops_free_list net/core/net_namespace.c:146 [inline] cleanup_net+0x3bf/0x630 net/core/net_namespace.c:477 process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092 worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226 kthread+0x26d/0x300 kernel/kthread.c:211 ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 The buggy address belongs to the object at ffff8801c89a2100 which belongs to the cache kmalloc-8192 of size 8192 The buggy address is located 2040 bytes inside of 8192-byte region [ffff8801c89a2100, ffff8801c89a4100) The buggy address belongs to the page: page:ffffea0007226800 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 flags: 0x8000000000004080(slab|head) page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801c89a2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801c89a2800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801c89a2880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801c89a2900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801c89a2980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================