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BUG: KASAN: use-after-free in ccid_hc_tx_delete+0xde/0x100 net/dccp/ccid.c:188
Read of size 8 at addr ffff88808f32d6c0 by task ksoftirqd/1/16
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.1.0-rc1+ #32
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:132
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:1699
__rcu_reclaim kernel/rcu/rcu.h:227 [inline]
rcu_do_batch kernel/rcu/tree.c:2475 [inline]
invoke_rcu_callbacks kernel/rcu/tree.c:2788 [inline]
rcu_core+0x928/0x1390 kernel/rcu/tree.c:2769
__do_softirq+0x266/0x95a kernel/softirq.c:293
run_ksoftirqd kernel/softirq.c:655 [inline]
run_ksoftirqd+0x8e/0x110 kernel/softirq.c:647
smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164
kthread+0x357/0x430 kernel/kthread.c:253
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Allocated by task 16706:
save_stack+0x45/0xd0 mm/kasan/common.c:75
set_track mm/kasan/common.c:87 [inline]
__kasan_kmalloc mm/kasan/common.c:497 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470
kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:505
slab_post_alloc_hook mm/slab.h:436 [inline]
slab_alloc mm/slab.c:3392 [inline]
kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3554
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/0x1935 net/dccp/input.c:680
dccp_v6_do_rcv+0x269/0xbf0 net/dccp/ipv6.c:641
sk_backlog_rcv include/net/sock.h:937 [inline]
__release_sock+0x12e/0x3a0 net/core/sock.c:2413
release_sock+0x59/0x1c0 net/core/sock.c:2929
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:1685
__do_sys_connect net/socket.c:1696 [inline]
__se_sys_connect net/socket.c:1693 [inline]
__x64_sys_connect+0x73/0xb0 net/socket.c:1693
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 16710:
save_stack+0x45/0xd0 mm/kasan/common.c:75
set_track mm/kasan/common.c:87 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:459
kasan_slab_free+0xe/0x10 mm/kasan/common.c:467
__cache_free mm/slab.c:3498 [inline]
kmem_cache_free+0x86/0x260 mm/slab.c:3764
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:293
The buggy address belongs to the object at ffff88808f32d6c0
which belongs to the cache ccid2_hc_tx_sock of size 1240
The buggy address is located 0 bytes inside of
1240-byte region [ffff88808f32d6c0, ffff88808f32db98)
The buggy address belongs to the page:
page:ffffea00023ccb00 count:1 mapcount:0 mapping:ffff88809bcfe080 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffff88809b21ae48 ffffea00014b3f88 ffff88809bcfe080
raw: 0000000000000000 ffff88808f32c0c0 0000000100000005 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88808f32d580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88808f32d600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88808f32d680: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
^
ffff88808f32d700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88808f32d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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