[   55.852651][   T26] audit: type=1800 audit(1573197745.690:29): pid=7938 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.150' (ECDSA) to the list of known hosts.
2019/11/08 07:22:32 fuzzer started
2019/11/08 07:22:35 dialing manager at 10.128.0.105:41185
2019/11/08 07:22:35 syscalls: 2553
2019/11/08 07:22:35 code coverage: enabled
2019/11/08 07:22:35 comparison tracing: enabled
2019/11/08 07:22:35 extra coverage: extra coverage is not supported by the kernel
2019/11/08 07:22:35 setuid sandbox: enabled
2019/11/08 07:22:35 namespace sandbox: enabled
2019/11/08 07:22:35 Android sandbox: /sys/fs/selinux/policy does not exist
2019/11/08 07:22:35 fault injection: enabled
2019/11/08 07:22:35 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2019/11/08 07:22:35 net packet injection: enabled
2019/11/08 07:22:35 net device setup: enabled
2019/11/08 07:22:35 concurrency sanitizer: enabled
2019/11/08 07:22:35 devlink PCI setup: PCI device 0000:00:10.0 is not available
syzkaller login: [   68.587173][ T8107] KCSAN: could not find function: 'may_open'
2019/11/08 07:22:38 adding functions to KCSAN blacklist: 'vm_area_dup' 'common_perm_cond' 'rcu_gp_fqs_loop' '__hrtimer_run_queues' '__ext4_new_inode' 'do_nanosleep' 'generic_write_end' 'find_next_bit' 'do_dentry_open' 'pipe_poll' 'echo_char' 'ktime_get_real_seconds' 'tomoyo_supervisor' 'run_timer_softirq' 'tcp_add_backlog' 'ep_poll' 'tick_do_update_jiffies64' 'may_open' 'find_get_pages_range_tag' 'generic_permission' 
[   72.834863][ T8110] ==================================================================
[   72.843036][ T8110] BUG: KCSAN: data-race in mod_timer / timer_clear_idle
[   72.850038][ T8110] 
[   72.852361][ T8110] write to 0xffff88812bf1b6e4 of 1 bytes by task 0 on cpu 1:
[   72.859725][ T8110]  timer_clear_idle+0x42/0x50
[   72.864398][ T8110]  __tick_nohz_idle_restart_tick+0x36/0x1b0
[   72.870284][ T8110]  tick_nohz_idle_exit+0x1af/0x1e0
[   72.875388][ T8110]  do_idle+0xb1/0x280
[   72.879361][ T8110]  cpu_startup_entry+0x1b/0x20
[   72.884119][ T8110]  start_secondary+0x208/0x260
[   72.888875][ T8110]  secondary_startup_64+0xa4/0xb0
[   72.893884][ T8110] 
[   72.896206][ T8110] read to 0xffff88812bf1b6e4 of 1 bytes by task 8110 on cpu 0:
[   72.903831][ T8110]  mod_timer+0x50d/0x7a0
[   72.908072][ T8110]  sk_reset_timer+0x2d/0x70
[   72.912567][ T8110]  tcp_rearm_rto+0x1e7/0x2a0
[   72.917163][ T8110]  tcp_event_new_data_sent+0x218/0x220
[   72.922612][ T8110]  tcp_write_xmit+0xa77/0x3120
[   72.927376][ T8110]  __tcp_push_pending_frames+0x7b/0x1d0
[   72.932914][ T8110]  tcp_push+0x1e9/0x3d0
[   72.937060][ T8110]  tcp_sendmsg_locked+0x1d2b/0x1fb0
[   72.942247][ T8110]  tcp_sendmsg+0x39/0x60
[   72.946480][ T8110]  inet_sendmsg+0x6d/0x90
[   72.950808][ T8110]  sock_sendmsg+0x9f/0xc0
[   72.955144][ T8110]  sock_write_iter+0x16b/0x210
[   72.959899][ T8110]  new_sync_write+0x388/0x4a0
[   72.964565][ T8110]  __vfs_write+0xb1/0xc0
[   72.968804][ T8110]  vfs_write+0x18a/0x390
[   72.973036][ T8110]  ksys_write+0xd5/0x1b0
[   72.977266][ T8110]  __x64_sys_write+0x4c/0x60
[   72.981857][ T8110]  do_syscall_64+0xcc/0x370
[   72.986355][ T8110]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   72.992221][ T8110] 
[   72.994545][ T8110] Reported by Kernel Concurrency Sanitizer on:
[   73.000691][ T8110] CPU: 0 PID: 8110 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0
[   73.008129][ T8110] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   73.018169][ T8110] ==================================================================
[   73.026215][ T8110] Kernel panic - not syncing: panic_on_warn set ...
[   73.032797][ T8110] CPU: 0 PID: 8110 Comm: syz-fuzzer Not tainted 5.4.0-rc6+ #0
[   73.040236][ T8110] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   73.050283][ T8110] Call Trace:
[   73.053572][ T8110]  dump_stack+0xf5/0x159
[   73.057811][ T8110]  panic+0x210/0x640
[   73.061705][ T8110]  ? vprintk_func+0x8d/0x140
[   73.066295][ T8110]  kcsan_report.cold+0xc/0xe
[   73.070882][ T8110]  kcsan_setup_watchpoint+0x3fe/0x410
[   73.076249][ T8110]  __tsan_read1+0x13f/0x1e0
[   73.080751][ T8110]  mod_timer+0x50d/0x7a0
[   73.084997][ T8110]  ? tcp_update_skb_after_send+0x1a6/0x260
[   73.090804][ T8110]  sk_reset_timer+0x2d/0x70
[   73.096603][ T8110]  tcp_rearm_rto+0x1e7/0x2a0
[   73.101192][ T8110]  tcp_event_new_data_sent+0x218/0x220
[   73.106650][ T8110]  tcp_write_xmit+0xa77/0x3120
[   73.111414][ T8110]  ? kmem_cache_alloc_node_trace+0x273/0x670
[   73.117407][ T8110]  __tcp_push_pending_frames+0x7b/0x1d0
[   73.122955][ T8110]  tcp_push+0x1e9/0x3d0
[   73.127111][ T8110]  tcp_sendmsg_locked+0x1d2b/0x1fb0
[   73.132322][ T8110]  tcp_sendmsg+0x39/0x60
[   73.136559][ T8110]  inet_sendmsg+0x6d/0x90
[   73.140883][ T8110]  ? inet_send_prepare+0x200/0x200
[   73.145990][ T8110]  sock_sendmsg+0x9f/0xc0
[   73.150317][ T8110]  sock_write_iter+0x16b/0x210
[   73.155082][ T8110]  new_sync_write+0x388/0x4a0
[   73.159764][ T8110]  __vfs_write+0xb1/0xc0
[   73.164006][ T8110]  vfs_write+0x18a/0x390
[   73.168250][ T8110]  ksys_write+0xd5/0x1b0
[   73.172567][ T8110]  __x64_sys_write+0x4c/0x60
[   73.177154][ T8110]  do_syscall_64+0xcc/0x370
[   73.181666][ T8110]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   73.187546][ T8110] RIP: 0033:0x47c530
[   73.191444][ T8110] 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
[   73.211040][ T8110] RSP: 002b:000000c4206374f8 EFLAGS: 00000216 ORIG_RAX: 0000000000000001
[   73.219441][ T8110] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530
[   73.227401][ T8110] RDX: 0000000000000008 RSI: 000000c4201c0200 RDI: 0000000000000003
[   73.235365][ T8110] RBP: 000000c420637550 R08: 0000000000000000 R09: 0000000000000000
[   73.243328][ T8110] R10: 0000000000000000 R11: 0000000000000216 R12: 000000c4200b5b00
[   73.251288][ T8110] R13: 0000000000000007 R14: 0000000000c1dc00 R15: 0000000000001838
[   74.402335][ T8110] Shutting down cpus with NMI
[   74.408333][ T8110] Kernel Offset: disabled
[   74.412676][ T8110] Rebooting in 86400 seconds..