================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:345 [inline] BUG: KASAN: slab-out-of-bounds in pfkey_msg2xfrm_state net/key/af_key.c:1220 [inline] BUG: KASAN: slab-out-of-bounds in pfkey_add+0x1778/0x3210 net/key/af_key.c:1499 Read of size 6016 at addr ffff8801c28f7580 by task syz-executor6/7607 CPU: 1 PID: 7607 Comm: syz-executor6 Not tainted 4.17.0-rc2+ #27 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+0x1b9/0x294 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 memcpy+0x23/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:345 [inline] pfkey_msg2xfrm_state net/key/af_key.c:1220 [inline] pfkey_add+0x1778/0x3210 net/key/af_key.c:1499 pfkey_process+0x7cc/0x8a0 net/key/af_key.c:2819 pfkey_sendmsg+0x5f4/0x1050 net/key/af_key.c:3658 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 ___sys_sendmsg+0x805/0x940 net/socket.c:2117 __sys_sendmsg+0x115/0x270 net/socket.c:2155 __do_sys_sendmsg net/socket.c:2164 [inline] __se_sys_sendmsg net/socket.c:2162 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455979 RSP: 002b:00007f477aa3ec68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f477aa3f6d4 RCX: 0000000000455979 RDX: 0000000000000000 RSI: 0000000020b6dfc8 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000538 R14: 00000000006fbde0 R15: 0000000000000000 Allocated by task 7607: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.38+0x3a/0xe0 net/core/skbuff.c:137 __alloc_skb+0x14d/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:989 [inline] pfkey_sendmsg+0x250/0x1050 net/key/af_key.c:3645 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 ___sys_sendmsg+0x805/0x940 net/socket.c:2117 __sys_sendmsg+0x115/0x270 net/socket.c:2155 __do_sys_sendmsg net/socket.c:2164 [inline] __se_sys_sendmsg net/socket.c:2162 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 25: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x260 mm/slab.c:3813 skb_free_head+0x99/0xc0 net/core/skbuff.c:550 skb_release_data+0x690/0x860 net/core/skbuff.c:570 skb_release_all+0x4a/0x60 net/core/skbuff.c:627 __kfree_skb net/core/skbuff.c:641 [inline] consume_skb+0x18b/0x550 net/core/skbuff.c:701 __dev_kfree_skb_any+0xa7/0xd0 net/core/dev.c:2578 dev_kfree_skb_any include/linux/netdevice.h:3323 [inline] team_dummy_transmit+0x1a/0x20 drivers/net/team/team.c:519 team_xmit+0x4e6/0x9d0 drivers/net/team/team.c:1689 __netdev_start_xmit include/linux/netdevice.h:4098 [inline] netdev_start_xmit include/linux/netdevice.h:4107 [inline] xmit_one net/core/dev.c:3052 [inline] dev_hard_start_xmit+0x264/0xc10 net/core/dev.c:3068 __dev_queue_xmit+0x2724/0x34c0 net/core/dev.c:3587 dev_queue_xmit+0x17/0x20 net/core/dev.c:3620 neigh_resolve_output+0x679/0xad0 net/core/neighbour.c:1361 neigh_output include/net/neighbour.h:483 [inline] ip6_finish_output2+0xc93/0x2800 net/ipv6/ip6_output.c:120 ip6_finish_output+0x5fe/0xbc0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:277 [inline] ip6_output+0x227/0x9b0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:288 [inline] ndisc_send_skb+0x100d/0x1570 net/ipv6/ndisc.c:491 ndisc_send_ns+0x3c1/0x8d0 net/ipv6/ndisc.c:633 addrconf_dad_work+0xbef/0x1300 net/ipv6/addrconf.c:4042 process_one_work+0xc1e/0x1b50 kernel/workqueue.c:2145 worker_thread+0x1cc/0x1440 kernel/workqueue.c:2279 kthread+0x345/0x410 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 The buggy address belongs to the object at ffff8801c28f7540 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 64 bytes inside of 512-byte region [ffff8801c28f7540, ffff8801c28f7740) The buggy address belongs to the page: page:ffffea00070a3dc0 count:1 mapcount:0 mapping:ffff8801c28f7040 index:0xffff8801c28f7040 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801c28f7040 ffff8801c28f7040 0000000100000005 raw: ffffea0006d42b20 ffffea0006d3c7a0 ffff8801da800940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801c28f7600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801c28f7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801c28f7700: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8801c28f7780: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8801c28f7800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================