Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.15.224' (ECDSA) to the list of known hosts.
2019/10/22 13:08:25 fuzzer started
2019/10/22 13:08:26 dialing manager at 10.128.0.105:37053
2019/10/22 13:08:26 syscalls: 2524
2019/10/22 13:08:26 code coverage: enabled
2019/10/22 13:08:26 comparison tracing: enabled
2019/10/22 13:08:26 extra coverage: extra coverage is not supported by the kernel
2019/10/22 13:08:26 setuid sandbox: enabled
2019/10/22 13:08:26 namespace sandbox: enabled
2019/10/22 13:08:26 Android sandbox: /sys/fs/selinux/policy does not exist
2019/10/22 13:08:26 fault injection: enabled
2019/10/22 13:08:26 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/10/22 13:08:26 net packet injection: enabled
2019/10/22 13:08:26 net device setup: enabled
2019/10/22 13:08:26 concurrency sanitizer: enabled
syzkaller login: [   54.361619][ T7288] ==================================================================
[   54.369772][ T7288] BUG: KCSAN: data-race in tcp_add_backlog / tcp_grow_window.isra.0
[   54.377882][ T7288] 
[   54.380194][ T7288] write to 0xffff888126a5012c of 4 bytes by interrupt on cpu 0:
[   54.387816][ T7288]  tcp_add_backlog+0x4a0/0xcc0
[   54.392567][ T7288]  tcp_v4_rcv+0x1a60/0x1bb0
[   54.397046][ T7288]  ip_protocol_deliver_rcu+0x4d/0x420
[   54.402445][ T7288]  ip_local_deliver_finish+0x110/0x140
[   54.407879][ T7288]  ip_local_deliver+0x133/0x210
[   54.412701][ T7288]  ip_rcv_finish+0x121/0x160
[   54.417264][ T7288]  ip_rcv+0x18f/0x1a0
[   54.421224][ T7288]  __netif_receive_skb_one_core+0xa7/0xe0
[   54.426974][ T7288]  __netif_receive_skb+0x37/0xf0
[   54.431897][ T7288]  netif_receive_skb_internal+0x59/0x190
[   54.437615][ T7288]  napi_gro_receive+0x28f/0x330
[   54.442446][ T7288]  receive_buf+0x284/0x30b0
[   54.446928][ T7288]  virtnet_poll+0x436/0x7d0
[   54.451413][ T7288]  net_rx_action+0x3ae/0xa90
[   54.456053][ T7288] 
[   54.458362][ T7288] read to 0xffff888126a5012c of 4 bytes by task 7288 on cpu 1:
[   54.465878][ T7288]  tcp_grow_window.isra.0+0x6b/0x480
[   54.471139][ T7288]  tcp_event_data_recv+0x68f/0x990
[   54.476222][ T7288]  tcp_rcv_established+0xbfe/0xf50
[   54.481312][ T7288]  tcp_v4_do_rcv+0x381/0x4e0
[   54.485874][ T7288]  __release_sock+0x135/0x1e0
[   54.490525][ T7288]  release_sock+0x61/0x160
[   54.494916][ T7288]  tcp_recvmsg+0x63b/0x1a30
[   54.499394][ T7288]  inet_recvmsg+0xbb/0x250
[   54.503786][ T7288]  sock_recvmsg+0x92/0xb0
[   54.508092][ T7288]  sock_read_iter+0x15f/0x1e0
[   54.512741][ T7288]  new_sync_read+0x389/0x4f0
[   54.517307][ T7288]  __vfs_read+0xb1/0xc0
[   54.521437][ T7288]  vfs_read+0x143/0x2c0
[   54.525558][ T7288] 
[   54.527857][ T7288] Reported by Kernel Concurrency Sanitizer on:
[   54.534050][ T7288] CPU: 1 PID: 7288 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0
[   54.541476][ T7288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.551503][ T7288] ==================================================================
[   54.559538][ T7288] Kernel panic - not syncing: panic_on_warn set ...
[   54.566100][ T7288] CPU: 1 PID: 7288 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0
[   54.573527][ T7288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.583555][ T7288] Call Trace:
[   54.586827][ T7288]  dump_stack+0xf5/0x159
[   54.591046][ T7288]  panic+0x210/0x640
[   54.594981][ T7288]  ? sock_recvmsg+0x92/0xb0
[   54.599481][ T7288]  ? vprintk_func+0x8d/0x140
[   54.604064][ T7288]  kcsan_report.cold+0xc/0x10
[   54.608724][ T7288]  __kcsan_setup_watchpoint+0x32e/0x4a0
[   54.614251][ T7288]  __tsan_read4+0x2c/0x30
[   54.618559][ T7288]  tcp_grow_window.isra.0+0x6b/0x480
[   54.623822][ T7288]  ? __kcsan_setup_watchpoint+0x6b/0x4a0
[   54.629437][ T7288]  tcp_event_data_recv+0x68f/0x990
[   54.634529][ T7288]  tcp_rcv_established+0xbfe/0xf50
[   54.639620][ T7288]  ? ipv4_dst_check+0xc6/0xf0
[   54.644276][ T7288]  tcp_v4_do_rcv+0x381/0x4e0
[   54.649008][ T7288]  __release_sock+0x135/0x1e0
[   54.653674][ T7288]  release_sock+0x61/0x160
[   54.658123][ T7288]  tcp_recvmsg+0x63b/0x1a30
[   54.662626][ T7288]  inet_recvmsg+0xbb/0x250
[   54.667023][ T7288]  ? __tsan_read8+0x2c/0x30
[   54.671503][ T7288]  ? inet_sendpage+0x100/0x100
[   54.676257][ T7288]  sock_recvmsg+0x92/0xb0
[   54.680565][ T7288]  sock_read_iter+0x15f/0x1e0
[   54.685232][ T7288]  new_sync_read+0x389/0x4f0
[   54.689813][ T7288]  __vfs_read+0xb1/0xc0
[   54.693948][ T7288]  vfs_read+0x143/0x2c0
[   54.698080][ T7288]  ksys_read+0xd5/0x1b0
[   54.702228][ T7288]  __x64_sys_read+0x4c/0x60
[   54.706719][ T7288]  do_syscall_64+0xcc/0x370
[   54.711202][ T7288]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   54.717068][ T7288] RIP: 0033:0x47c530
[   54.720944][ T7288] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
[   54.740541][ T7288] RSP: 002b:000000c4203b78c0 EFLAGS: 00000206 ORIG_RAX: 0000000000000000
[   54.748934][ T7288] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[   54.756885][ T7288] RDX: 0000000000001000 RSI: 000000c420064000 RDI: 0000000000000003
[   54.764831][ T7288] RBP: 000000c4203b7918 R08: 0000000000000000 R09: 0000000000000000
[   54.772788][ T7288] R10: 0000000000000000 R11: 0000000000000206 R12: 000000c4205075f8
[   54.780735][ T7288] R13: 000000000000000f R14: 0000000000c14060 R15: 00000000000001a1
[   54.790272][ T7288] Kernel Offset: disabled
[   54.794594][ T7288] Rebooting in 86400 seconds..