audit: type=1400 audit(1521536117.727:8): avc: denied { map } for pid=4228 comm="syz-execprog" path="/root/syzkaller-shm640761244" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 IPVS: ftp: loaded support on port[0] = 21 ================================================================== 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+0x1634/0x3270 net/key/af_key.c:1499 Read of size 8160 at addr ffff8801b348b300 by task syz-executor0/4236 CPU: 1 PID: 4236 Comm: syz-executor0 Not tainted 4.16.0-rc6+ #270 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x23c/0x360 mm/kasan/report.c:412 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x137/0x190 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+0x1634/0x3270 net/key/af_key.c:1499 pfkey_process+0x67e/0x740 net/key/af_key.c:2819 pfkey_sendmsg+0x4dc/0xa00 net/key/af_key.c:3658 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2046 __sys_sendmsg+0xe5/0x210 net/socket.c:2080 C_SYSC_sendmsg net/compat.c:739 [inline] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:737 do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fc9c99 RSP: 002b:00000000ff99416c EFLAGS: 00000282 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020b6dfc8 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 4236: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:552 __do_kmalloc_node mm/slab.c:3669 [inline] __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3683 __kmalloc_reserve.isra.39+0x41/0xd0 net/core/skbuff.c:137 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:983 [inline] pfkey_sendmsg+0x20f/0xa00 net/key/af_key.c:3645 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2046 __sys_sendmsg+0xe5/0x210 net/socket.c:2080 C_SYSC_sendmsg net/compat.c:739 [inline] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:737 do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8801b348b2c0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 64 bytes inside of 512-byte region [ffff8801b348b2c0, ffff8801b348b4c0) The buggy address belongs to the page: page:ffffea0006cd22c0 count:1 mapcount:0 mapping:ffff8801b348b040 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801b348b040 0000000000000000 0000000100000006 raw: ffffea0006ccc7e0 ffffea0006cd5e20 ffff8801dac00940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b348b380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801b348b400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801b348b480: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8801b348b500: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8801b348b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================