IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready 8021q: adding VLAN 0 to HW filter on device batadv0 ================================================================== BUG: KASAN: use-after-free in ccid_hc_tx_delete+0xde/0x100 net/dccp/ccid.c:188 Read of size 8 at addr ffff888085f06c00 by task ksoftirqd/0/9 CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.0.0-rc8+ #1 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+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135 ccid_hc_tx_delete+0xde/0x100 net/dccp/ccid.c:188 dccp_sk_destruct+0x3f/0x90 net/dccp/proto.c:181 __sk_destruct+0x55/0x6d0 net/core/sock.c:1569 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0x928/0x1390 kernel/rcu/tree.c:2754 __do_softirq+0x266/0x95a kernel/softirq.c:292 run_ksoftirqd kernel/softirq.c:654 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:646 smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Allocated by task 8380: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:468 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:503 slab_post_alloc_hook mm/slab.h:440 [inline] slab_alloc mm/slab.c:3388 [inline] kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3548 ccid_new+0x256/0x3f0 net/dccp/ccid.c:151 dccp_hdlr_ccid+0x27/0x150 net/dccp/feat.c:44 __dccp_feat_activate+0x17a/0x270 net/dccp/feat.c:344 dccp_feat_activate_values+0x33a/0x766 net/dccp/feat.c:1538 dccp_rcv_request_sent_state_process net/dccp/input.c:472 [inline] dccp_rcv_state_process+0x116f/0x1931 net/dccp/input.c:680 dccp_v6_do_rcv+0x269/0xbf0 net/dccp/ipv6.c:641 sk_backlog_rcv include/net/sock.h:936 [inline] __release_sock+0x12e/0x3a0 net/core/sock.c:2284 release_sock+0x59/0x1c0 net/core/sock.c:2800 inet_wait_for_connect net/ipv4/af_inet.c:588 [inline] __inet_stream_connect+0x59f/0xea0 net/ipv4/af_inet.c:680 inet_stream_connect+0x58/0xa0 net/ipv4/af_inet.c:719 __sys_connect+0x266/0x330 net/socket.c:1662 __do_sys_connect net/socket.c:1673 [inline] __se_sys_connect net/socket.c:1670 [inline] __ia32_sys_connect+0x72/0xb0 net/socket.c:1670 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Freed by task 8387: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:457 kasan_slab_free+0xe/0x10 mm/kasan/common.c:465 __cache_free mm/slab.c:3494 [inline] kmem_cache_free+0x86/0x260 mm/slab.c:3754 ccid_hc_tx_delete+0xc1/0x100 net/dccp/ccid.c:190 dccp_hdlr_ccid+0x7d/0x150 net/dccp/feat.c:53 __dccp_feat_activate+0x17a/0x270 net/dccp/feat.c:344 dccp_feat_activate_values+0x33a/0x766 net/dccp/feat.c:1538 dccp_create_openreq_child+0x40c/0x570 net/dccp/minisocks.c:127 dccp_v6_request_recv_sock+0x214/0x1da0 net/dccp/ipv6.c:469 dccp_check_req+0x35c/0x6f0 net/dccp/minisocks.c:196 dccp_v6_rcv+0x6d7/0x191e net/dccp/ipv6.c:747 ip6_protocol_deliver_rcu+0x303/0x16c0 net/ipv6/ip6_input.c:394 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:434 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:443 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x1e7/0x320 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:272 __netif_receive_skb_one_core+0x115/0x1a0 net/core/dev.c:4973 __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083 process_backlog+0x206/0x750 net/core/dev.c:5923 napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x4fa/0x1070 net/core/dev.c:6412 __do_softirq+0x266/0x95a kernel/softirq.c:292 The buggy address belongs to the object at ffff888085f06c00 which belongs to the cache ccid2_hc_tx_sock of size 1240 The buggy address is located 0 bytes inside of 1240-byte region [ffff888085f06c00, ffff888085f070d8) The buggy address belongs to the page: page:ffffea000217c180 count:1 mapcount:0 mapping:ffff88821655fd80 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea0002291c88 ffffea0002636f88 ffff88821655fd80 raw: 0000000000000000 ffff888085f06100 0000000100000005 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888085f06b00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc ffff888085f06b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888085f06c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888085f06c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888085f06d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================