Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.112' (ECDSA) to the list of known hosts.
2020/06/17 11:08:40 fuzzer started
2020/06/17 11:08:40 dialing manager at 10.128.0.105:40489
2020/06/17 11:08:42 syscalls: 3085
2020/06/17 11:08:42 code coverage: enabled
2020/06/17 11:08:42 comparison tracing: enabled
2020/06/17 11:08:42 extra coverage: enabled
2020/06/17 11:08:42 setuid sandbox: enabled
2020/06/17 11:08:42 namespace sandbox: enabled
2020/06/17 11:08:42 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/17 11:08:42 fault injection: enabled
2020/06/17 11:08:42 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/17 11:08:42 net packet injection: enabled
2020/06/17 11:08:42 net device setup: enabled
2020/06/17 11:08:42 concurrency sanitizer: enabled
2020/06/17 11:08:42 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/17 11:08:42 USB emulation: enabled
2020/06/17 11:08:43 suppressing KCSAN reports in functions: 'dd_has_work' 'alloc_pid' 'copy_process' 'ep_poll' 'ext4_sync_file' 'do_nanosleep' 'tick_sched_do_timer' 'find_get_pages_range_tag' 'complete_signal' 'ext4_free_inodes_count' 'generic_write_end' 
syzkaller login: [   66.791546][ T8905] ==================================================================
[   66.799668][ T8905] BUG: KCSAN: data-race in mod_timer / timer_clear_idle
[   66.806574][ T8905] 
[   66.808883][ T8905] write to 0xffff88812c01dca4 of 1 bytes by task 0 on cpu 0:
[   66.816233][ T8905]  timer_clear_idle+0x3d/0x50
[   66.820907][ T8905]  __tick_nohz_idle_restart_tick+0x32/0x1a0
[   66.826777][ T8905]  tick_nohz_idle_exit+0x19c/0x1d0
[   66.831907][ T8905]  do_idle+0xac/0x290
[   66.835884][ T8905]  cpu_startup_entry+0x14/0x20
[   66.840623][ T8905]  rest_init+0xe4/0xeb
[   66.844670][ T8905]  arch_call_rest_init+0x13/0x2b
[   66.849582][ T8905]  start_kernel+0x7fe/0x823
[   66.854063][ T8905]  secondary_startup_64+0xa4/0xb0
[   66.859054][ T8905] 
[   66.861362][ T8905] read to 0xffff88812c01dca4 of 1 bytes by task 8905 on cpu 1:
[   66.868934][ T8905]  mod_timer+0x631/0x830
[   66.873366][ T8905]  sk_reset_timer+0x29/0xc0
[   66.877852][ T8905]  tcp_rearm_rto+0x1ce/0x280
[   66.882510][ T8905]  tcp_event_new_data_sent+0x23f/0x260
[   66.887950][ T8905]  tcp_write_xmit+0x5c6/0x31e0
[   66.892694][ T8905]  __tcp_push_pending_frames+0x72/0x1b0
[   66.898232][ T8905]  tcp_push+0x1ec/0x3e0
[   66.902364][ T8905]  tcp_sendmsg_locked+0x1de3/0x20f0
[   66.907535][ T8905]  tcp_sendmsg+0x35/0x50
[   66.911763][ T8905]  inet_sendmsg+0x69/0x90
[   66.916067][ T8905]  sock_sendmsg+0x98/0xc0
[   66.920388][ T8905]  sock_write_iter+0x186/0x240
[   66.925128][ T8905]  new_sync_write+0x303/0x400
[   66.929781][ T8905]  __vfs_write+0x9e/0xb0
[   66.933999][ T8905]  vfs_write+0x189/0x380
[   66.938216][ T8905]  ksys_write+0x16a/0x1a0
[   66.942519][ T8905]  __x64_sys_write+0x49/0x60
[   66.947085][ T8905]  do_syscall_64+0xc7/0x3b0
[   66.951566][ T8905]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   66.957426][ T8905] 
[   66.959729][ T8905] Reported by Kernel Concurrency Sanitizer on:
[   66.965896][ T8905] CPU: 1 PID: 8905 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   66.974111][ T8905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.984247][ T8905] ==================================================================
[   66.992310][ T8905] Kernel panic - not syncing: panic_on_warn set ...
[   66.998891][ T8905] CPU: 1 PID: 8905 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[   67.007100][ T8905] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   67.017128][ T8905] Call Trace:
[   67.020400][ T8905]  dump_stack+0x11d/0x187
[   67.024726][ T8905]  panic+0x210/0x640
[   67.028637][ T8905]  ? vprintk_func+0x89/0x13a
[   67.033215][ T8905]  kcsan_report.cold+0xc/0x1a
[   67.037881][ T8905]  kcsan_setup_watchpoint+0x3fb/0x440
[   67.043251][ T8905]  mod_timer+0x631/0x830
[   67.047496][ T8905]  sk_reset_timer+0x29/0xc0
[   67.051994][ T8905]  tcp_rearm_rto+0x1ce/0x280
[   67.056709][ T8905]  tcp_event_new_data_sent+0x23f/0x260
[   67.062301][ T8905]  tcp_write_xmit+0x5c6/0x31e0
[   67.067054][ T8905]  ? iov_iter_advance+0x21c/0x900
[   67.072073][ T8905]  __tcp_push_pending_frames+0x72/0x1b0
[   67.077949][ T8905]  tcp_push+0x1ec/0x3e0
[   67.082118][ T8905]  tcp_sendmsg_locked+0x1de3/0x20f0
[   67.087332][ T8905]  ? aa_label_sk_perm.part.0+0x220/0x290
[   67.092954][ T8905]  tcp_sendmsg+0x35/0x50
[   67.097215][ T8905]  inet_sendmsg+0x69/0x90
[   67.101527][ T8905]  ? inet_send_prepare+0x1f0/0x1f0
[   67.106618][ T8905]  sock_sendmsg+0x98/0xc0
[   67.110927][ T8905]  sock_write_iter+0x186/0x240
[   67.115689][ T8905]  new_sync_write+0x303/0x400
[   67.120349][ T8905]  __vfs_write+0x9e/0xb0
[   67.124580][ T8905]  vfs_write+0x189/0x380
[   67.128800][ T8905]  ksys_write+0x16a/0x1a0
[   67.133195][ T8905]  __x64_sys_write+0x49/0x60
[   67.137779][ T8905]  do_syscall_64+0xc7/0x3b0
[   67.142494][ T8905]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   67.148389][ T8905] RIP: 0033:0x4b3cdb
[   67.152270][ T8905] 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
[   67.171857][ T8905] RSP: 002b:000000c0005df540 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   67.180252][ T8905] RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b3cdb
[   67.188214][ T8905] RDX: 0000000000000007 RSI: 000000c00000a200 RDI: 0000000000000006
[   67.196264][ T8905] RBP: 000000c0005df590 R08: 000000c00000a201 R09: 0000000000000007
[   67.204223][ T8905] R10: 000000c000114000 R11: 0000000000000202 R12: 000000000000011e
[   67.212179][ T8905] R13: 000000c000484000 R14: 0000000000000007 R15: 0000000000000d40
[   68.295580][ T8905] Shutting down cpus with NMI
[   68.301763][ T8905] Kernel Offset: disabled
[   68.306080][ T8905] Rebooting in 86400 seconds..