================================================================== BUG: KASAN: slab-out-of-bounds in __write_once_size include/linux/compiler.h:220 [inline] BUG: KASAN: slab-out-of-bounds in __hlist_del include/linux/list.h:702 [inline] BUG: KASAN: slab-out-of-bounds in hlist_del_init include/linux/list.h:717 [inline] BUG: KASAN: slab-out-of-bounds in __xfrm_policy_unlink+0x977/0xa00 net/xfrm/xfrm_policy.c:2213 Write of size 8 at addr ffff88806ef65a68 by task syz-executor1/9328 CPU: 1 PID: 9328 Comm: syz-executor1 Not tainted 5.0.0-rc3+ #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_store8_noabort+0x17/0x20 mm/kasan/generic_report.c:140 __write_once_size include/linux/compiler.h:220 [inline] __hlist_del include/linux/list.h:702 [inline] hlist_del_init include/linux/list.h:717 [inline] __xfrm_policy_unlink+0x977/0xa00 net/xfrm/xfrm_policy.c:2213 xfrm_policy_flush+0x331/0x460 net/xfrm/xfrm_policy.c:1789 pfkey_spdflush+0xaf/0x3c0 net/key/af_key.c:2785 pfkey_process+0x6d2/0x810 net/key/af_key.c:2844 pfkey_sendmsg+0x5bb/0xfc0 net/key/af_key.c:3683 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:631 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116 __sys_sendmsg+0x112/0x270 net/socket.c:2154 __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458089 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:00007f56cc971c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458089 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f56cc9726d4 R13: 00000000004c5600 R14: 00000000004d9340 R15: 00000000ffffffff Allocated by task 5623: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:496 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:504 __do_kmalloc mm/slab.c:3711 [inline] __kmalloc+0x15c/0x740 mm/slab.c:3720 kmalloc include/linux/slab.h:550 [inline] kzalloc include/linux/slab.h:740 [inline] __register_sysctl_table+0xc7/0xff0 fs/proc/proc_sysctl.c:1306 register_net_sysctl+0x29/0x30 net/sysctl_net.c:120 neigh_sysctl_register+0x3a5/0x730 net/core/neighbour.c:3664 addrconf_sysctl_register+0xbb/0x1e0 net/ipv6/addrconf.c:6792 ipv6_add_dev net/ipv6/addrconf.c:446 [inline] ipv6_add_dev+0xb34/0x12c0 net/ipv6/addrconf.c:366 addrconf_notify+0xa12/0x25c0 net/ipv6/addrconf.c:3452 notifier_call_chain+0x179/0x380 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1739 call_netdevice_notifiers_extack net/core/dev.c:1751 [inline] call_netdevice_notifiers net/core/dev.c:1765 [inline] register_netdevice+0xae0/0x10b0 net/core/dev.c:8658 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:2550 __do_sys_unshare kernel/fork.c:2618 [inline] __se_sys_unshare kernel/fork.c:2616 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2616 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'rx-0' (00000000cb3aad32): kobject_add_internal: parent: 'queues', set: 'queues' Freed by task 9: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:458 kasan_slab_free+0xe/0x10 mm/kasan/common.c:466 __cache_free mm/slab.c:3487 [inline] kfree+0xcf/0x230 mm/slab.c:3806 in6_dev_finish_destroy_rcu+0x8a/0xb0 net/ipv6/addrconf_core.c:209 kobject: 'rx-0' (00000000cb3aad32): kobject_uevent_env __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xc4a/0x1680 kernel/rcu/tree.c:2754 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 The buggy address belongs to the object at ffff88806ef656c0 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 936 bytes inside of 1024-byte region [ffff88806ef656c0, ffff88806ef65ac0) kobject: 'rx-0' (00000000cb3aad32): fill_kobj_path: path = '/devices/virtual/net/bcsf0/queues/rx-0' The buggy address belongs to the page: page:ffffea0001bbd900 count:1 mapcount:0 mapping:ffff88812c3f0ac0 index:0xffff88806ef65b40 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea000261c808 ffffea0002562888 ffff88812c3f0ac0 raw: ffff88806ef65b40 ffff88806ef64040 0000000100000004 0000000000000000 kobject: 'tx-0' (000000008b0a54de): kobject_add_internal: parent: 'queues', set: 'queues' page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88806ef65900: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88806ef65980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88806ef65a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88806ef65a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88806ef65b00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ==================================================================