team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves ================================================================== 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+0x59d/0x680 net/ipv6/xfrm6_tunnel.c:303 Read of size 8 at addr ffff888091259078 by task kworker/0:2/28969 CPU: 0 PID: 28969 Comm: kworker/0:2 Not tainted 4.14.196-syzkaller #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+0xf7/0x13b lib/dump_stack.c:58 print_address_description.cold.7+0x9/0x1c9 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report.cold.8+0x11a/0x2d3 mm/kasan/report.c:409 __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+0x59d/0x680 net/ipv6/xfrm6_tunnel.c:303 xfrm_state_gc_destroy net/xfrm/xfrm_state.c:449 [inline] xfrm_state_gc_task+0x46a/0x760 net/xfrm/xfrm_state.c:472 process_one_work+0x79e/0x16c0 kernel/workqueue.c:2116 worker_thread+0xcc/0xee0 kernel/workqueue.c:2250 kthread+0x338/0x400 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Allocated by task 6481: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:551 __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x15b/0x7b0 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] kzalloc include/linux/slab.h:661 [inline] ops_init+0xc2/0x380 net/core/net_namespace.c:108 setup_net+0x233/0x4f0 net/core/net_namespace.c:295 copy_net_ns+0x16b/0x3c0 net/core/net_namespace.c:419 create_new_namespaces+0x476/0x740 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0x87/0x1a0 kernel/nsproxy.c:206 SYSC_unshare kernel/fork.c:2391 [inline] SyS_unshare+0x299/0x6e0 kernel/fork.c:2341 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb Freed by task 22: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x71/0xc0 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.9+0x1b4/0x2c0 net/core/net_namespace.c:154 ops_free_list net/core/net_namespace.c:152 [inline] cleanup_net+0x420/0x7f0 net/core/net_namespace.c:488 process_one_work+0x79e/0x16c0 kernel/workqueue.c:2116 worker_thread+0xcc/0xee0 kernel/workqueue.c:2250 kthread+0x338/0x400 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 The buggy address belongs to the object at ffff888091258880 which belongs to the cache kmalloc-8192 of size 8192 The buggy address is located 2040 bytes inside of 8192-byte region [ffff888091258880, ffff88809125a880) The buggy address belongs to the page: page:ffffea0002449600 count:1 mapcount:0 mapping:ffff888091258880 index:0x0 compound_mapcount: 0 flags: 0xfffe0000008100(slab|head) raw: 00fffe0000008100 ffff888091258880 0000000000000000 0000000100000001 raw: ffffea000245cf20 ffffea000245cc20 ffff8880aa802080 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888091258f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888091258f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888091259000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888091259080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888091259100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================