Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.27' (ECDSA) to the list of known hosts.
2020/06/15 09:08:22 fuzzer started
2020/06/15 09:08:22 dialing manager at 10.128.0.105:32959
2020/06/15 09:08:27 syscalls: 3085
2020/06/15 09:08:27 code coverage: enabled
2020/06/15 09:08:27 comparison tracing: enabled
2020/06/15 09:08:27 extra coverage: enabled
2020/06/15 09:08:27 setuid sandbox: enabled
2020/06/15 09:08:27 namespace sandbox: enabled
2020/06/15 09:08:27 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/15 09:08:27 fault injection: enabled
2020/06/15 09:08:27 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/15 09:08:27 net packet injection: enabled
2020/06/15 09:08:27 net device setup: enabled
2020/06/15 09:08:27 concurrency sanitizer: enabled
2020/06/15 09:08:27 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/15 09:08:27 USB emulation: enabled
syzkaller login: [   56.219577][ T8921] KCSAN: could not find function: '_find_next_bit'
2020/06/15 09:08:30 suppressing KCSAN reports in functions: 'generic_file_read_iter' 'complete_signal' 'copy_process' 'generic_write_end' 'xas_clear_mark' 'decrypt_packet' 'wbt_done' '__ext4_new_inode' '_find_next_bit' 'run_timer_softirq' 'blk_mq_dispatch_rq_list' 'find_get_pages_range_tag' 'pcpu_alloc' 'futex_wait_queue_me' 'kauditd_thread' 'ep_poll' 'blk_mq_get_request' 'file_update_time' 'blk_mq_sched_dispatch_requests' '__mpage_writepage' 'alloc_pid' 'page_counter_charge' 'tick_nohz_next_event' 'do_nanosleep' 'generic_fillattr' 'tick_nohz_idle_stop_tick' 
[  115.115520][ T8906] ==================================================================
[  115.123994][ T8906] BUG: KCSAN: data-race in mod_timer / timer_clear_idle
[  115.130894][ T8906] 
[  115.133200][ T8906] write to 0xffff88812c01dca4 of 1 bytes by task 0 on cpu 0:
[  115.140687][ T8906]  timer_clear_idle+0x3d/0x50
[  115.145354][ T8906]  __tick_nohz_idle_restart_tick+0x32/0x1a0
[  115.151239][ T8906]  tick_nohz_idle_exit+0x19c/0x1d0
[  115.156367][ T8906]  do_idle+0xac/0x290
[  115.160356][ T8906]  cpu_startup_entry+0x14/0x20
[  115.165105][ T8906]  rest_init+0xe4/0xeb
[  115.169157][ T8906]  arch_call_rest_init+0x13/0x2b
[  115.174096][ T8906]  start_kernel+0x7fe/0x823
[  115.178579][ T8906]  secondary_startup_64+0xa4/0xb0
[  115.183589][ T8906] 
[  115.185896][ T8906] read to 0xffff88812c01dca4 of 1 bytes by task 8906 on cpu 1:
[  115.193421][ T8906]  mod_timer+0x631/0x830
[  115.197659][ T8906]  sk_reset_timer+0x29/0xc0
[  115.202151][ T8906]  tcp_rearm_rto+0x1ce/0x280
[  115.206726][ T8906]  tcp_event_new_data_sent+0x23f/0x260
[  115.212189][ T8906]  tcp_write_xmit+0x5c6/0x31e0
[  115.216933][ T8906]  __tcp_push_pending_frames+0x72/0x1b0
[  115.222889][ T8906]  tcp_push+0x1ec/0x3e0
[  115.227039][ T8906]  tcp_sendmsg_locked+0x1de3/0x20f0
[  115.232340][ T8906]  tcp_sendmsg+0x35/0x50
[  115.236569][ T8906]  inet_sendmsg+0x69/0x90
[  115.240888][ T8906]  sock_sendmsg+0x98/0xc0
[  115.245199][ T8906]  sock_write_iter+0x186/0x240
[  115.249942][ T8906]  new_sync_write+0x303/0x400
[  115.254595][ T8906]  __vfs_write+0x9e/0xb0
[  115.258822][ T8906]  vfs_write+0x189/0x380
[  115.263037][ T8906]  ksys_write+0x16a/0x1a0
[  115.267515][ T8906]  __x64_sys_write+0x49/0x60
[  115.272097][ T8906]  do_syscall_64+0xc7/0x3b0
[  115.276581][ T8906]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  115.282608][ T8906] 
[  115.284916][ T8906] Reported by Kernel Concurrency Sanitizer on:
[  115.291049][ T8906] CPU: 1 PID: 8906 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[  115.299262][ T8906] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  115.309308][ T8906] ==================================================================
[  115.317372][ T8906] Kernel panic - not syncing: panic_on_warn set ...
[  115.324230][ T8906] CPU: 1 PID: 8906 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[  115.332456][ T8906] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  115.342487][ T8906] Call Trace:
[  115.345771][ T8906]  dump_stack+0x11d/0x187
[  115.350081][ T8906]  panic+0x210/0x640
[  115.353970][ T8906]  ? vprintk_func+0x89/0x13a
[  115.358555][ T8906]  kcsan_report.cold+0xc/0x1a
[  115.363238][ T8906]  kcsan_setup_watchpoint+0x3fb/0x440
[  115.368618][ T8906]  mod_timer+0x631/0x830
[  115.372887][ T8906]  sk_reset_timer+0x29/0xc0
[  115.377380][ T8906]  tcp_rearm_rto+0x1ce/0x280
[  115.381974][ T8906]  tcp_event_new_data_sent+0x23f/0x260
[  115.387617][ T8906]  tcp_write_xmit+0x5c6/0x31e0
[  115.392531][ T8906]  ? iov_iter_advance+0x21c/0x900
[  115.397652][ T8906]  __tcp_push_pending_frames+0x72/0x1b0
[  115.403218][ T8906]  tcp_push+0x1ec/0x3e0
[  115.407365][ T8906]  tcp_sendmsg_locked+0x1de3/0x20f0
[  115.412572][ T8906]  ? aa_label_sk_perm.part.0+0x220/0x290
[  115.418206][ T8906]  tcp_sendmsg+0x35/0x50
[  115.422455][ T8906]  inet_sendmsg+0x69/0x90
[  115.426766][ T8906]  ? inet_send_prepare+0x1f0/0x1f0
[  115.431858][ T8906]  sock_sendmsg+0x98/0xc0
[  115.436182][ T8906]  sock_write_iter+0x186/0x240
[  115.440930][ T8906]  new_sync_write+0x303/0x400
[  115.446982][ T8906]  __vfs_write+0x9e/0xb0
[  115.451415][ T8906]  vfs_write+0x189/0x380
[  115.455635][ T8906]  ksys_write+0x16a/0x1a0
[  115.460039][ T8906]  __x64_sys_write+0x49/0x60
[  115.464611][ T8906]  do_syscall_64+0xc7/0x3b0
[  115.469110][ T8906]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  115.475241][ T8906] RIP: 0033:0x4b3cdb
[  115.479138][ T8906] Code: ff e9 69 ff ff ff cc cc cc cc cc cc cc cc cc e8 bb a1 f8 ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 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
[  115.499588][ T8906] RSP: 002b:000000c007ac9540 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[  115.507979][ T8906] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b3cdb
[  115.515944][ T8906] RDX: 0000000000000007 RSI: 000000c00000a200 RDI: 0000000000000006
[  115.524003][ T8906] RBP: 000000c007ac9590 R08: 000000c00000a201 R09: 0000000000000007
[  115.531968][ T8906] R10: 000000c000112000 R11: 0000000000000202 R12: 000000000000011e
[  115.539917][ T8906] R13: 000000c0003da000 R14: 0000000000000007 R15: 00000000000024d0
[  116.623477][ T8906] Shutting down cpus with NMI
[  116.630717][ T8906] Kernel Offset: disabled
[  116.635161][ T8906] Rebooting in 86400 seconds..