[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.856576] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 21.859920] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.234063] random: sshd: uninitialized urandom read (32 bytes read) [ 23.116263] random: sshd: uninitialized urandom read (32 bytes read) [ 23.315576] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.194' (ECDSA) to the list of known hosts. [ 28.774636] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.834946] kasan: CONFIG_KASAN_INLINE enabled [ 30.839577] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.846941] general protection fault: 0000 [#1] SMP KASAN [ 30.852464] CPU: 1 PID: 2133 Comm: kworker/1:2 Not tainted 4.18.0-rc4+ #140 [ 30.859554] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.868904] Workqueue: events p9_poll_workfn [ 30.873304] RIP: 0010:__lock_acquire+0x245/0x5020 [ 30.878121] Code: 28 00 00 00 0f 85 03 34 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 c6 35 00 00 49 81 7d 00 60 86 e7 89 0f 84 42 ff [ 30.897516] RSP: 0018:ffff8801cd546e60 EFLAGS: 00010006 [ 30.903034] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 30.910729] RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 30.917993] RBP: ffff8801cd5471e8 R08: 0000000000000001 R09: 0000000000000001 [ 30.925244] R10: ffffed003ac9b825 R11: 0000000000000001 R12: 0000000000000001 [ 30.932580] R13: 0000000000000018 R14: ffff8801cd4f4680 R15: 0000000000000000 [ 30.939831] FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 30.948042] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.953903] CR2: 00000000203b9fdc CR3: 00000001ab7f9000 CR4: 00000000001406e0 [ 30.961158] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.968406] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.975655] Call Trace: [ 30.978231] ? find_held_lock+0x36/0x1c0 [ 30.982276] ? trace_hardirqs_on+0x10/0x10 [ 30.986513] ? lock_downgrade+0x8f0/0x8f0 [ 30.990648] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 30.996168] ? __radix_tree_lookup+0x3dd/0x6e0 [ 31.000732] ? graph_lock+0x170/0x170 [ 31.004528] ? __radix_tree_insert+0x8f0/0x8f0 [ 31.009098] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.014097] ? graph_lock+0x170/0x170 [ 31.017879] ? graph_lock+0x170/0x170 [ 31.021661] ? print_usage_bug+0xc0/0xc0 [ 31.025718] ? lock_downgrade+0x8f0/0x8f0 [ 31.029857] lock_acquire+0x1e4/0x540 [ 31.033643] ? p9_conn_cancel+0x166/0xd30 [ 31.037783] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.042781] ? lock_release+0xa30/0xa30 [ 31.046737] ? graph_lock+0x170/0x170 [ 31.050519] ? __lock_acquire+0x7fc/0x5020 [ 31.054745] _raw_spin_lock_irqsave+0x96/0xc0 [ 31.059231] ? p9_conn_cancel+0x166/0xd30 [ 31.063371] p9_conn_cancel+0x166/0xd30 [ 31.067328] ? p9_fd_cancelled+0x2f0/0x2f0 [ 31.071543] ? pty_write_room+0xc9/0xf0 [ 31.075496] ? pty_stop+0x1c0/0x1c0 [ 31.079121] ? tty_write_room+0x71/0x90 [ 31.083083] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.088601] ? n_tty_poll+0x5d0/0xab0 [ 31.092386] ? n_tty_receive_signal_char+0x120/0x120 [ 31.097475] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 31.103006] ? ldsem_up_read+0x54/0x90 [ 31.106878] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.112404] ? pipe_poll+0x2bd/0x340 [ 31.116101] ? generic_pipe_buf_confirm+0x10/0x10 [ 31.120939] p9_poll_workfn+0x4b2/0x6d0 [ 31.124921] ? p9_read_work+0x1060/0x1060 [ 31.129063] ? graph_lock+0x170/0x170 [ 31.132852] ? lock_acquire+0x1e4/0x540 [ 31.136811] ? process_one_work+0xb9b/0x1ba0 [ 31.141205] ? kasan_check_read+0x11/0x20 [ 31.145342] ? __lock_is_held+0xb5/0x140 [ 31.149390] process_one_work+0xc73/0x1ba0 [ 31.153620] ? trace_hardirqs_on+0x10/0x10 [ 31.157838] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 31.162489] ? lock_repin_lock+0x430/0x430 [ 31.166727] ? __sched_text_start+0x8/0x8 [ 31.170856] ? lock_downgrade+0x8f0/0x8f0 [ 31.174995] ? graph_lock+0x170/0x170 [ 31.178787] ? lock_acquire+0x1e4/0x540 [ 31.182742] ? worker_thread+0x3dc/0x13c0 [ 31.186871] ? lock_downgrade+0x8f0/0x8f0 [ 31.191024] ? lock_release+0xa30/0xa30 [ 31.194999] ? kasan_check_read+0x11/0x20 [ 31.199163] ? do_raw_spin_unlock+0xa7/0x2f0 [ 31.203578] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 31.208144] ? kasan_check_write+0x14/0x20 [ 31.212361] ? do_raw_spin_lock+0xc1/0x200 [ 31.216578] worker_thread+0x189/0x13c0 [ 31.220537] ? process_one_work+0x1ba0/0x1ba0 [ 31.225017] ? graph_lock+0x170/0x170 [ 31.228802] ? graph_lock+0x170/0x170 [ 31.232587] ? find_held_lock+0x36/0x1c0 [ 31.236635] ? lock_downgrade+0x8f0/0x8f0 [ 31.240768] ? kasan_check_read+0x11/0x20 [ 31.244896] ? do_raw_spin_unlock+0xa7/0x2f0 [ 31.249291] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 31.255245] ? __kthread_parkme+0x58/0x1b0 [ 31.259464] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.264465] ? trace_hardirqs_on+0xd/0x10 [ 31.268610] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 31.274141] ? __kthread_parkme+0x106/0x1b0 [ 31.278457] kthread+0x345/0x410 [ 31.281812] ? process_one_work+0x1ba0/0x1ba0 [ 31.286302] ? kthread_bind+0x40/0x40 [ 31.290089] ret_from_fork+0x3a/0x50 [ 31.293781] Modules linked in: [ 31.296959] Dumping ftrace buffer: [ 31.300487] (ftrace buffer empty) [ 31.304187] ---[ end trace 7b21d69ebadc8360 ]--- [ 31.308932] RIP: 0010:__lock_acquire+0x245/0x5020 [ 31.313836] Code: 28 00 00 00 0f 85 03 34 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 c6 35 00 00 49 81 7d 00 60 86 e7 89 0f 84 42 ff [ 31.332963] RSP: 0018:ffff8801cd546e60 EFLAGS: 00010006 [ 31.338307] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 31.345569] RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 31.352821] RBP: ffff8801cd5471e8 R08: 0000000000000001 R09: 0000000000000001 [ 31.360085] R10: ffffed003ac9b825 R11: 0000000000000001 R12: 0000000000000001 [ 31.367349] R13: 0000000000000018 R14: ffff8801cd4f4680 R15: 0000000000000000 [ 31.374629] FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 31.382849] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.388714] CR2: 00000000203b9fdc CR3: 00000001ab7f9000 CR4: 00000000001406e0 [ 31.395989] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.403246] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.410499] Kernel panic - not syncing: Fatal exception [ 31.416791] Dumping ftrace buffer: [ 31.420332] (ftrace buffer empty) [ 31.424029] Kernel Offset: disabled [ 31.427643] Rebooting in 86400 seconds..