syzbot

SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=8169 comm=syz-executor.2
BTRFS error (device loop3): open_ctree failed
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=8169 comm=syz-executor.2
==================================================================
BUG: KASAN: double-free or invalid-free in tcp_cdg_release+0x37/0x50 net/ipv4/tcp_cdg.c:389
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=8169 comm=syz-executor.2

CPU: 0 PID: 8122 Comm: syz-executor.0 Not tainted 4.19.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=8169 comm=syz-executor.2
 kasan_report_invalid_free+0x65/0xa0 mm/kasan/report.c:336
 __kasan_slab_free+0x13a/0x150 mm/kasan/kasan.c:501
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcf/0x220 mm/slab.c:3822
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=8169 comm=syz-executor.2
 tcp_cdg_release+0x37/0x50 net/ipv4/tcp_cdg.c:389
 tcp_cleanup_congestion_control+0x71/0x100 net/ipv4/tcp_cong.c:209
 tcp_v4_destroy_sock+0xff/0x7d0 net/ipv4/tcp_ipv4.c:1972
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=8169 comm=syz-executor.2
 tcp_v6_destroy_sock+0x16/0x30 net/ipv6/tcp_ipv6.c:1763
 inet_csk_destroy_sock+0x19a/0x420 net/ipv4/inet_connection_sock.c:838
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=8169 comm=syz-executor.2
 tcp_done+0x29e/0x310 net/ipv4/tcp.c:3765
 tcp_v6_syn_recv_sock+0x1c39/0x2310 net/ipv6/tcp_ipv6.c:1237
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=8169 comm=syz-executor.2
 tcp_get_cookie_sock+0xd5/0x700 net/ipv4/syncookies.c:213
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=8169 comm=syz-executor.2
 cookie_v6_check+0x1434/0x20d0 net/ipv6/syncookies.c:257
 tcp_v6_cookie_check net/ipv6/tcp_ipv6.c:1029 [inline]
 tcp_v6_do_rcv+0x10e7/0x13c0 net/ipv6/tcp_ipv6.c:1337
 tcp_v6_rcv+0x2eaa/0x35a0 net/ipv6/tcp_ipv6.c:1546
 ip6_input_finish+0x36f/0x17c0 net/ipv6/ip6_input.c:395
 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:438
 dst_input include/net/dst.h:453 [inline]
 ip6_rcv_finish+0x1de/0x2f0 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 ipv6_rcv+0x119/0x430 net/ipv6/ip6_input.c:283
 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4947
 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5059
 process_backlog+0x23a/0x7a0 net/core/dev.c:5870
 napi_poll net/core/dev.c:6293 [inline]
 net_rx_action+0x4f5/0x1070 net/core/dev.c:6359
 __do_softirq+0x25c/0x921 kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1091
 </IRQ>
 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:336
 do_softirq kernel/softirq.c:328 [inline]
 __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:189
 local_bh_enable include/linux/bottom_half.h:32 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:721 [inline]
 ip6_finish_output2+0xbd2/0x2560 net/ipv6/ip6_output.c:121
 ip6_finish_output+0x574/0xbe0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:447 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 ip6_xmit+0xe44/0x2030 net/ipv6/ip6_output.c:275
 inet6_csk_xmit+0x2fb/0x5ba net/ipv6/inet6_connection_sock.c:139
 __tcp_transmit_skb+0x1ae1/0x39f0 net/ipv4/tcp_output.c:1146
 tcp_transmit_skb net/ipv4/tcp_output.c:1162 [inline]
 tcp_write_xmit+0x142a/0x5230 net/ipv4/tcp_output.c:2387
 __tcp_push_pending_frames+0xb4/0x280 net/ipv4/tcp_output.c:2563
 tcp_send_fin+0x153/0xc40 net/ipv4/tcp_output.c:3107
 tcp_close+0xdcd/0x10a0 net/ipv4/tcp.c:2412
 inet_release+0xff/0x1e0 net/ipv4/af_inet.c:428
 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:472
 __sock_release+0xce/0x2a0 net/socket.c:579
 sock_close+0x1b/0x30 net/socket.c:1140
 __fput+0x2dd/0x8b0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 get_signal+0x1baa/0x1fc0 kernel/signal.c:2389
 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45af49
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff5d57b8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002d
RAX: fffffffffffffe00 RBX: 0000000000000006 RCX: 000000000045af49
RDX: 000000000000001c RSI: 00000000200001c0 RDI: 0000000000000005
RBP: 000000000075bfc8 R08: 0000000020001880 R09: 000000000000001c
R10: 0000000000000100 R11: 0000000000000246 R12: 00007ff5d57b96d4
R13: 00000000004c978a R14: 00000000004e2450 R15: 00000000ffffffff

Allocated by task 8130:
 save_stack+0x45/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc mm/kasan/kasan.c:553 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15d/0x750 mm/slab.c:3736
 kmalloc_array include/linux/slab.h:637 [inline]
 kcalloc include/linux/slab.h:648 [inline]
 tcp_cdg_init+0x11f/0x180 net/ipv4/tcp_cdg.c:379
 tcp_init_congestion_control+0xac/0x450 net/ipv4/tcp_cong.c:182
 tcp_reinit_congestion_control+0xd1/0x100 net/ipv4/tcp_cong.c:200
 tcp_set_congestion_control+0x46d/0x570 net/ipv4/tcp_cong.c:377
 do_tcp_setsockopt.isra.0+0x41f/0x23a0 net/ipv4/tcp.c:2745
 tcp_setsockopt+0xbe/0xe0 net/ipv4/tcp.c:3079
 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046
 __sys_setsockopt+0x17a/0x280 net/socket.c:1901
 __do_sys_setsockopt net/socket.c:1912 [inline]
 __se_sys_setsockopt net/socket.c:1909 [inline]
 __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 8190:
 save_stack+0x45/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcf/0x220 mm/slab.c:3822
 tcp_cdg_release+0x37/0x50 net/ipv4/tcp_cdg.c:389
 tcp_cleanup_congestion_control+0x71/0x100 net/ipv4/tcp_cong.c:209
 tcp_v4_destroy_sock+0xff/0x7d0 net/ipv4/tcp_ipv4.c:1972
 tcp_v6_destroy_sock+0x16/0x30 net/ipv6/tcp_ipv6.c:1763
 inet_csk_destroy_sock+0x19a/0x420 net/ipv4/inet_connection_sock.c:838
 tcp_close+0xa58/0x10a0 net/ipv4/tcp.c:2487
 inet_release+0xff/0x1e0 net/ipv4/af_inet.c:428
 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:472
 __sock_release+0xce/0x2a0 net/socket.c:579
 sock_close+0x1b/0x30 net/socket.c:1140
 __fput+0x2dd/0x8b0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 get_signal+0x1baa/0x1fc0 kernel/signal.c:2389
 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88809f328a80
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
 64-byte region [ffff88809f328a80, ffff88809f328ac0)
The buggy address belongs to the page:
page:ffffea00027cca00 count:1 mapcount:0 mapping:ffff88812c31c340 index:0x0
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffffea00027cc308 ffffea0002a5e808 ffff88812c31c340
raw: 0000000000000000 ffff88809f328000 0000000100000020 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809f328980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88809f328a00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88809f328a80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                   ^
 ffff88809f328b00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88809f328b80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================