================================================================== BUG: KASAN: slab-out-of-bounds in pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline] BUG: KASAN: slab-out-of-bounds in pfkey_add+0x1481/0x3230 net/key/af_key.c:1506 Read of size 3873 at addr ffff8801d3e05418 by task syz-executor6/8240 CPU: 1 PID: 8240 Comm: syz-executor6 Not tainted 4.9.105-g61aafb6 #44 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d04cf6e0 ffffffff81eb41a9 ffffea00074f8100 ffff8801d3e05418 0000000000000000 ffff8801d3e05600 ffff8801d3e05400 ffff8801d04cf718 ffffffff81567e49 ffff8801d3e05418 0000000000000f21 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_address_description+0x6c/0x234 mm/kasan/report.c:256 [] kasan_report_error mm/kasan/report.c:355 [inline] [] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412 [] check_memory_region_inline mm/kasan/kasan.c:318 [inline] [] check_memory_region+0x14f/0x1b0 mm/kasan/kasan.c:325 [] memcpy+0x23/0x50 mm/kasan/kasan.c:360 [] pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline] [] pfkey_add+0x1481/0x3230 net/key/af_key.c:1506 [] pfkey_process+0x671/0x740 net/key/af_key.c:2834 [] pfkey_sendmsg+0x346/0xae0 net/key/af_key.c:3678 [] sock_sendmsg_nosec net/socket.c:635 [inline] [] sock_sendmsg+0xcc/0x110 net/socket.c:645 [] ___sys_sendmsg+0x6fc/0x840 net/socket.c:1969 [] __sys_sendmsg+0xd9/0x190 net/socket.c:2003 [] SYSC_sendmsg net/socket.c:2014 [inline] [] SyS_sendmsg+0x2d/0x50 net/socket.c:2010 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Allocated by task 8240: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:505 set_track mm/kasan/kasan.c:517 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:609 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:547 slab_post_alloc_hook mm/slab.h:417 [inline] slab_alloc_node mm/slub.c:2715 [inline] slab_alloc mm/slub.c:2723 [inline] __kmalloc_track_caller+0xdc/0x2b0 mm/slub.c:4232 __kmalloc_reserve.isra.37+0x33/0xc0 net/core/skbuff.c:138 __alloc_skb+0x11a/0x600 net/core/skbuff.c:231 alloc_skb include/linux/skbuff.h:919 [inline] pfkey_sendmsg+0xfe/0xae0 net/key/af_key.c:3665 sock_sendmsg_nosec net/socket.c:635 [inline] sock_sendmsg+0xcc/0x110 net/socket.c:645 ___sys_sendmsg+0x6fc/0x840 net/socket.c:1969 __sys_sendmsg+0xd9/0x190 net/socket.c:2003 SYSC_sendmsg net/socket.c:2014 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2010 do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 entry_SYSCALL_64_after_swapgs+0x5d/0xdb Freed by task 4074: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:505 set_track mm/kasan/kasan.c:517 [inline] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:582 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xfb/0x310 mm/slub.c:3878 skb_free_head+0x8b/0xb0 net/core/skbuff.c:580 skb_release_data+0x329/0x400 net/core/skbuff.c:611 skb_release_all+0x4a/0x60 net/core/skbuff.c:670 __kfree_skb+0x15/0x20 net/core/skbuff.c:684 kfree_skb+0xcc/0x340 net/core/skbuff.c:705 ip6_mc_input+0x643/0xb20 net/ipv6/ip6_input.c:402 dst_input include/net/dst.h:513 [inline] ip6_rcv_finish+0x155/0x680 net/ipv6/ip6_input.c:69 NF_HOOK_THRESH include/linux/netfilter.h:232 [inline] NF_HOOK include/linux/netfilter.h:255 [inline] ipv6_rcv+0x1080/0x1fd0 net/ipv6/ip6_input.c:203 __netif_receive_skb_core+0x12a0/0x2a20 net/core/dev.c:4267 __netif_receive_skb+0x5b/0x1b0 net/core/dev.c:4305 process_backlog+0x206/0x6a0 net/core/dev.c:4926 napi_poll net/core/dev.c:5227 [inline] net_rx_action+0x3c4/0xde0 net/core/dev.c:5292 __do_softirq+0x20b/0x937 kernel/softirq.c:284 The buggy address belongs to the object at ffff8801d3e05400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 24 bytes inside of 512-byte region [ffff8801d3e05400, ffff8801d3e05600) The buggy address belongs to the page: page:ffffea00074f8100 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 flags: 0x8000000000004080(slab|head) page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d3e05500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801d3e05580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801d3e05600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801d3e05680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801d3e05700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================