SELinux: unrecognized netlink message: protocol=0 nlmsg_type=5727 sclass=netlink_route_socket pig=19162 comm=syz-executor.3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=12152 sclass=netlink_route_socket pig=19162 comm=syz-executor.3 ================================================================== BUG: KASAN: use-after-free in __dev_queue_xmit+0x1653/0x1b90 net/core/dev.c:3431 Read of size 4 at addr ffff8801d27f8224 by task syz-executor.2/19177 CPU: 0 PID: 19177 Comm: syz-executor.2 Not tainted 4.9.141+ #1 ffff880197ecf028 ffffffff81b42e79 ffffea000749fe00 ffff8801d27f8224 0000000000000000 ffff8801d27f8224 ffff880182b16710 ffff880197ecf060 ffffffff815009b8 ffff8801d27f8224 0000000000000004 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 [] __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 [] __dev_queue_xmit+0x1653/0x1b90 net/core/dev.c:3431 [] dev_queue_xmit+0x17/0x20 net/core/dev.c:3506 [] neigh_resolve_output+0x600/0x780 net/core/neighbour.c:1325 [] dst_neigh_output include/net/dst.h:470 [inline] [] ip6_finish_output2+0xb0e/0x1d10 net/ipv6/ip6_output.c:119 [] ip6_finish_output+0x334/0x980 net/ipv6/ip6_output.c:145 [] NF_HOOK_COND include/linux/netfilter.h:246 [inline] [] ip6_output+0x1ea/0x6d0 net/ipv6/ip6_output.c:162 [] dst_output include/net/dst.h:507 [inline] [] ip6_local_out+0x9b/0x180 net/ipv6/output_core.c:176 [] ip6_send_skb+0xa1/0x340 net/ipv6/ip6_output.c:1751 [] udp_v6_send_skb+0x429/0xe70 net/ipv6/udp.c:974 [] udp_v6_push_pending_frames+0x22d/0x340 net/ipv6/udp.c:1007 [] udpv6_sendmsg+0x1dc1/0x2430 net/ipv6/udp.c:1273 [] inet_sendmsg+0x203/0x4d0 net/ipv4/af_inet.c:770 [] sock_sendmsg_nosec net/socket.c:648 [inline] [] sock_sendmsg+0xbb/0x110 net/socket.c:658 [] ___sys_sendmsg+0x47a/0x840 net/socket.c:1982 [] __sys_sendmmsg+0x161/0x3d0 net/socket.c:2072 [] SYSC_sendmmsg net/socket.c:2103 [inline] [] SyS_sendmmsg+0x35/0x60 net/socket.c:2098 [] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb The buggy address belongs to the page: page:ffffea000749fe00 count:0 mapcount:-127 mapping: (null) index:0x0 flags: 0x4000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d27f8100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8801d27f8180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8801d27f8200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8801d27f8280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8801d27f8300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================