================================================================== 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:1181 [inline] BUG: KASAN: slab-out-of-bounds in pfkey_add+0x275e/0x3210 net/key/af_key.c:1499 Read of size 8192 at addr ffff8801b8372cc0 by task syzkaller868462/4430 CPU: 0 PID: 4430 Comm: syzkaller868462 Not tainted 4.16.0+ #2 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+0xac/0x2f5 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:1181 [inline] pfkey_add+0x275e/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 SYSC_sendmsg net/socket.c:2164 [inline] SyS_sendmsg+0x29/0x30 net/socket.c:2162 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x43fd19 RSP: 002b:00007ffe7805a4b8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd19 RDX: 0000000000000000 RSI: 0000000020196fe4 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401640 R13: 00000000004016d0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 4430: 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:987 [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 SYSC_sendmsg net/socket.c:2164 [inline] SyS_sendmsg+0x29/0x30 net/socket.c:2162 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8801b8372c80 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 64 bytes inside of 512-byte region [ffff8801b8372c80, ffff8801b8372e80) The buggy address belongs to the page: page:ffffea0006e0dc80 count:1 mapcount:0 mapping:ffff8801b8372000 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801b8372000 0000000000000000 0000000100000006 raw: ffffea0006e1a8e0 ffff8801dac01748 ffff8801dac00940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b8372d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801b8372e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801b8372e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801b8372f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801b8372f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================