[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.44' (ECDSA) to the list of known hosts.
2020/05/25 01:20:08 fuzzer started
2020/05/25 01:20:08 dialing manager at 10.128.0.105:37929
2020/05/25 01:20:08 syscalls: 3055
2020/05/25 01:20:08 code coverage: enabled
2020/05/25 01:20:08 comparison tracing: enabled
2020/05/25 01:20:08 extra coverage: enabled
2020/05/25 01:20:08 setuid sandbox: enabled
2020/05/25 01:20:08 namespace sandbox: enabled
2020/05/25 01:20:08 Android sandbox: /sys/fs/selinux/policy does not exist
2020/05/25 01:20:08 fault injection: enabled
2020/05/25 01:20:08 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/05/25 01:20:08 net packet injection: enabled
2020/05/25 01:20:08 net device setup: enabled
2020/05/25 01:20:08 concurrency sanitizer: enabled
2020/05/25 01:20:08 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/05/25 01:20:08 USB emulation: enabled
syzkaller login: [   48.759325][ T8891] KCSAN: could not find function: '_find_next_bit'
2020/05/25 01:20:11 adding functions to KCSAN blacklist: 'find_get_pages_range_tag' 'io_sq_thread' '_find_next_bit' 'xas_clear_mark' '__snd_rawmidi_transmit_ack' 'tick_nohz_next_event' 'ext4_free_inodes_count' 'shmem_getpage_gfp' 'ep_poll' 'dd_has_work' 'blk_mq_get_request' 'generic_fillattr' 'blk_mq_sched_dispatch_requests' 'generic_write_end' 'atime_needs_update' '__ext4_new_inode' 'run_timer_softirq' 'page_counter_charge' 
[   94.667359][ T8888] ==================================================================
[   94.675555][ T8888] BUG: KCSAN: data-race in mod_timer / timer_clear_idle
[   94.682459][ T8888] 
[   94.684767][ T8888] write to 0xffff88812c11dca4 of 1 bytes by task 0 on cpu 1:
[   94.692113][ T8888]  timer_clear_idle+0x3d/0x50
[   94.696902][ T8888]  __tick_nohz_idle_restart_tick+0x32/0x1a0
[   94.702781][ T8888]  tick_nohz_idle_exit+0x19c/0x1d0
[   94.708394][ T8888]  do_idle+0xac/0x290
[   94.712373][ T8888]  cpu_startup_entry+0x14/0x20
[   94.717115][ T8888]  start_secondary+0x169/0x1b0
[   94.721855][ T8888]  secondary_startup_64+0xa4/0xb0
[   94.726859][ T8888] 
[   94.729278][ T8888] read to 0xffff88812c11dca4 of 1 bytes by task 8888 on cpu 0:
[   94.737007][ T8888]  mod_timer+0x631/0x830
[   94.741236][ T8888]  sk_reset_timer+0x29/0xc0
[   94.745725][ T8888]  tcp_rearm_rto+0x1ce/0x280
[   94.750292][ T8888]  tcp_event_new_data_sent+0x23f/0x260
[   94.755743][ T8888]  tcp_write_xmit+0x5c6/0x31e0
[   94.760504][ T8888]  __tcp_push_pending_frames+0x72/0x1b0
[   94.766140][ T8888]  tcp_push+0x1ec/0x3e0
[   94.770293][ T8888]  tcp_sendmsg_locked+0x1de3/0x20f0
[   94.775465][ T8888]  tcp_sendmsg+0x35/0x50
[   94.779703][ T8888]  inet_sendmsg+0x69/0x90
[   94.784011][ T8888]  sock_sendmsg+0x98/0xc0
[   94.789273][ T8888]  sock_write_iter+0x186/0x240
[   94.796335][ T8888]  new_sync_write+0x303/0x400
[   94.801687][ T8888]  __vfs_write+0x9e/0xb0
[   94.805921][ T8888]  vfs_write+0x189/0x380
[   94.810223][ T8888]  ksys_write+0x16a/0x1a0
[   94.814526][ T8888]  __x64_sys_write+0x49/0x60
[   94.819271][ T8888]  do_syscall_64+0xc7/0x3b0
[   94.823753][ T8888]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   94.829614][ T8888] 
[   94.831917][ T8888] Reported by Kernel Concurrency Sanitizer on:
[   94.838144][ T8888] CPU: 0 PID: 8888 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   94.846360][ T8888] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.856923][ T8888] ==================================================================
[   94.864957][ T8888] Kernel panic - not syncing: panic_on_warn set ...
[   94.871522][ T8888] CPU: 0 PID: 8888 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   94.879729][ T8888] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.889776][ T8888] Call Trace:
[   94.893069][ T8888]  dump_stack+0x11d/0x187
[   94.897382][ T8888]  panic+0x210/0x640
[   94.901255][ T8888]  ? vprintk_func+0x89/0x13a
[   94.905997][ T8888]  kcsan_report.cold+0xc/0x1a
[   94.910654][ T8888]  kcsan_setup_watchpoint+0x3fb/0x440
[   94.916013][ T8888]  mod_timer+0x631/0x830
[   94.920237][ T8888]  sk_reset_timer+0x29/0xc0
[   94.924719][ T8888]  tcp_rearm_rto+0x1ce/0x280
[   94.929375][ T8888]  tcp_event_new_data_sent+0x23f/0x260
[   94.934814][ T8888]  tcp_write_xmit+0x5c6/0x31e0
[   94.939583][ T8888]  ? iov_iter_advance+0x21c/0x900
[   94.944593][ T8888]  ? debug_smp_processor_id+0x3f/0x129
[   94.950046][ T8888]  __tcp_push_pending_frames+0x72/0x1b0
[   94.955578][ T8888]  tcp_push+0x1ec/0x3e0
[   94.959715][ T8888]  tcp_sendmsg_locked+0x1de3/0x20f0
[   94.965587][ T8888]  ? aa_label_sk_perm.part.0+0x220/0x290
[   94.971590][ T8888]  tcp_sendmsg+0x35/0x50
[   94.975824][ T8888]  inet_sendmsg+0x69/0x90
[   94.980323][ T8888]  ? inet_send_prepare+0x1f0/0x1f0
[   94.985439][ T8888]  sock_sendmsg+0x98/0xc0
[   94.990124][ T8888]  sock_write_iter+0x186/0x240
[   94.996560][ T8888]  new_sync_write+0x303/0x400
[   95.001799][ T8888]  __vfs_write+0x9e/0xb0
[   95.006136][ T8888]  vfs_write+0x189/0x380
[   95.010378][ T8888]  ksys_write+0x16a/0x1a0
[   95.014792][ T8888]  __x64_sys_write+0x49/0x60
[   95.019366][ T8888]  do_syscall_64+0xc7/0x3b0
[   95.023852][ T8888]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   95.029746][ T8888] RIP: 0033:0x47c530
[   95.033974][ T8888] 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
[   95.053644][ T8888] RSP: 002b:000000c4240074a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   95.062274][ T8888] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[   95.070225][ T8888] RDX: 0000000000000007 RSI: 000000c420052200 RDI: 0000000000000003
[   95.078305][ T8888] RBP: 000000c4240074f8 R08: 0000000000000000 R09: 0000000000000000
[   95.086275][ T8888] R10: 0000000000000000 R11: 0000000000000202 R12: 000000c4200c3b00
[   95.094247][ T8888] R13: 0000000000000007 R14: 0000000000c78780 R15: 000000000000389a
[   96.180498][ T8888] Shutting down cpus with NMI
[   96.186772][ T8888] Kernel Offset: disabled
[   96.192086][ T8888] Rebooting in 86400 seconds..