1 FILE: net/dccp/ipv6.c 2 3 ================================================================== 4 BUG: KASAN: use-after-free in skb_pfmemalloc include/linux/skbuff.h:829 [inline] at addr ffff88003b910d8c 5 BUG: KASAN: use-after-free in skb_clone+0x3a2/0x420 net/core/skbuff.c:1029 at addr ffff88003b910d8c 6 Read of size 4 by task syz-executor0/5591 7 CPU: 1 PID: 5591 Comm: syz-executor0 Not tainted 4.10.0-rc8+ #201 8 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 9 Call Trace: 10 <IRQ> 11 __dump_stack lib/dump_stack.c:15 [inline] 12 dump_stack+0x292/0x398 lib/dump_stack.c:51 13 kasan_object_err+0x1c/0x70 mm/kasan/report.c:162 14 print_address_description mm/kasan/report.c:200 [inline] 15 kasan_report_error mm/kasan/report.c:289 [inline] 16 kasan_report.part.1+0x20e/0x4e0 mm/kasan/report.c:311 17 kasan_report mm/kasan/report.c:331 [inline] 18 __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:331 19 skb_pfmemalloc include/linux/skbuff.h:829 [inline] 20 skb_clone+0x3a2/0x420 net/core/skbuff.c:1029 21 dccp_v6_request_recv_sock+0xb5e/0x1960 net/dccp/ipv6.c:527 22 dccp_check_req+0x335/0x5a0 net/dccp/minisocks.c:186 23 dccp_v6_rcv+0x69e/0x1d00 net/dccp/ipv6.c:711 24 ip6_input_finish+0x46d/0x17a0 net/ipv6/ip6_input.c:279 25 NF_HOOK include/linux/netfilter.h:257 [inline] 26 ip6_input+0xdb/0x590 net/ipv6/ip6_input.c:322 27 dst_input include/net/dst.h:507 [inline] 28 ip6_rcv_finish+0x289/0x890 net/ipv6/ip6_input.c:69 29 NF_HOOK include/linux/netfilter.h:257 [inline] 30 ipv6_rcv+0x12ec/0x23d0 net/ipv6/ip6_input.c:203 31 __netif_receive_skb_core+0x1ae5/0x3400 net/core/dev.c:4190 32 __netif_receive_skb+0x2a/0x170 net/core/dev.c:4228 33 process_backlog+0xe5/0x6c0 net/core/dev.c:4839 34 napi_poll net/core/dev.c:5202 [inline] 35 net_rx_action+0xe70/0x1900 net/core/dev.c:5267 36 __do_softirq+0x2fb/0xb7d kernel/softirq.c:284 37 do_softirq_own_stack+0x1c/0x30 arch/x86/entry/entry_64.S:902 38 </IRQ> 39 do_softirq.part.17+0x1e8/0x230 kernel/softirq.c:328 40 do_softirq kernel/softirq.c:176 [inline] 41 __local_bh_enable_ip+0x1f2/0x200 kernel/softirq.c:181 42 local_bh_enable include/linux/bottom_half.h:31 [inline] 43 rcu_read_unlock_bh include/linux/rcupdate.h:971 [inline] 44 ip6_finish_output2+0xbb0/0x23d0 net/ipv6/ip6_output.c:123 45 ip6_finish_output+0x302/0x960 net/ipv6/ip6_output.c:148 46 NF_HOOK_COND include/linux/netfilter.h:246 [inline] 47 ip6_output+0x1cb/0x8d0 net/ipv6/ip6_output.c:162 48 ip6_xmit+0xce6/0x20d0 include/net/dst.h:501 49 inet6_csk_xmit+0x320/0x5f0 net/ipv6/inet6_connection_sock.c:179 50 dccp_transmit_skb+0xb09/0x1120 net/dccp/output.c:141 51 dccp_send_ack+0x1bf/0x350 net/dccp/output.c:594 52 dccp_rcv_request_sent_state_process net/dccp/input.c:501 [inline] 53 dccp_rcv_state_process+0x102f/0x1650 net/dccp/input.c:670 54 dccp_v6_do_rcv+0x213/0x350 net/dccp/ipv6.c:632 55 sk_backlog_rcv include/net/sock.h:893 [inline] 56 __release_sock+0x127/0x3a0 net/core/sock.c:2053 57 release_sock+0xa5/0x2b0 net/core/sock.c:2540 58 inet_wait_for_connect net/ipv4/af_inet.c:557 [inline] 59 __inet_stream_connect+0x5f7/0xeb0 net/ipv4/af_inet.c:626 60 inet_stream_connect+0x55/0xa0 net/ipv4/af_inet.c:665 61 SYSC_connect+0x251/0x590 net/socket.c:1579 62 SyS_connect+0x24/0x30 net/socket.c:1560 63 entry_SYSCALL_64_fastpath+0x1f/0xc2 64
