[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.893607] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.530768] random: sshd: uninitialized urandom read (32 bytes read) [ 22.846551] random: sshd: uninitialized urandom read (32 bytes read) [ 23.732175] random: sshd: uninitialized urandom read (32 bytes read) [ 23.892209] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.50' (ECDSA) to the list of known hosts. [ 29.304684] 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 [ 29.430171] kasan: CONFIG_KASAN_INLINE enabled [ 29.434797] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.442174] general protection fault: 0000 [#1] SMP KASAN [ 29.447700] CPU: 1 PID: 19 Comm: kworker/1:0 Not tainted 4.18.0-rc3+ #4 [ 29.454431] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.463777] Workqueue: events smc_tcp_listen_work [ 29.468606] RIP: 0010:__lock_acquire+0x245/0x5020 [ 29.473422] 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 76 e7 89 0f 84 42 ff [ 29.492555] RSP: 0000:ffff8801d9b36d20 EFLAGS: 00010006 [ 29.497920] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 29.505173] RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 29.512421] RBP: ffff8801d9b370a8 R08: 0000000000000001 R09: 0000000000000001 [ 29.519673] R10: ffff8801d9b2a500 R11: 0000000000000001 R12: 0000000000000001 [ 29.526929] R13: 0000000000000018 R14: ffff8801d9b2a500 R15: 0000000000000000 [ 29.534179] FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 29.542382] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.548247] CR2: 0000000020002cc0 CR3: 00000001ae03f000 CR4: 00000000001406e0 [ 29.555509] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.562761] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.570010] Call Trace: [ 29.572586] ? trace_hardirqs_on+0x10/0x10 [ 29.576807] ? trace_hardirqs_on+0x10/0x10 [ 29.581022] ? __lock_acquire+0x7fc/0x5020 [ 29.585235] ? finish_task_switch+0x1d3/0x890 [ 29.589711] ? graph_lock+0x170/0x170 [ 29.593498] ? graph_lock+0x170/0x170 [ 29.597303] ? trace_hardirqs_on+0x10/0x10 [ 29.601516] ? print_usage_bug+0xc0/0xc0 [ 29.605567] ? lock_downgrade+0x8f0/0x8f0 [ 29.609694] ? lock_downgrade+0x8f0/0x8f0 [ 29.613825] ? mark_held_locks+0xc9/0x160 [ 29.617952] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 29.622518] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 29.627601] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.632618] ? graph_lock+0x170/0x170 [ 29.636418] lock_acquire+0x1e4/0x540 [ 29.640199] ? finish_wait+0x119/0x430 [ 29.644069] ? lock_release+0xa30/0xa30 [ 29.648026] ? find_held_lock+0x36/0x1c0 [ 29.652070] ? lock_acquire+0x1e4/0x540 [ 29.657788] _raw_spin_lock_irqsave+0x96/0xc0 [ 29.662269] ? finish_wait+0x119/0x430 [ 29.666150] finish_wait+0x119/0x430 [ 29.669856] ? mark_held_locks+0xc9/0x160 [ 29.673986] ? remove_wait_queue+0x360/0x360 [ 29.678386] ? __local_bh_enable_ip+0x161/0x230 [ 29.683036] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.688033] ? lock_sock_nested+0x9f/0x120 [ 29.692250] ? trace_hardirqs_on+0xd/0x10 [ 29.696378] ? __local_bh_enable_ip+0x161/0x230 [ 29.701031] inet_csk_accept+0x6d0/0xe70 [ 29.705074] ? inet_csk_listen_stop+0xa80/0xa80 [ 29.709724] ? finish_wait+0x430/0x430 [ 29.713595] ? lock_downgrade+0x8f0/0x8f0 [ 29.717736] ? kasan_check_read+0x11/0x20 [ 29.721866] ? do_raw_spin_unlock+0xa7/0x2f0 [ 29.726266] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 29.730839] ? kasan_check_write+0x14/0x20 [ 29.735052] ? do_raw_spin_lock+0xc1/0x200 [ 29.739269] inet_accept+0x138/0x9f0 [ 29.742963] ? prune_icache_sb+0x1b0/0x1b0 [ 29.747174] ? inet_recvmsg+0x6d0/0x6d0 [ 29.751736] ? trace_hardirqs_on+0xd/0x10 [ 29.755871] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 29.761400] ? get_next_ino+0x8b/0x110 [ 29.765269] ? security_socket_post_create+0x9f/0xd0 [ 29.770354] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 29.775875] ? sock_create_lite+0x4d/0x130 [ 29.780097] ? inet_recvmsg+0x6d0/0x6d0 [ 29.784058] kernel_accept+0x136/0x310 [ 29.787930] smc_tcp_listen_work+0x222/0xef0 [ 29.792405] ? smc_link_save_peer_info+0x320/0x320 [ 29.797321] ? __lock_is_held+0xb5/0x140 [ 29.801366] process_one_work+0xc73/0x1ba0 [ 29.805579] ? trace_hardirqs_on+0x10/0x10 [ 29.809796] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 29.814445] ? lock_repin_lock+0x430/0x430 [ 29.818666] ? __sched_text_start+0x8/0x8 [ 29.822800] ? graph_lock+0x170/0x170 [ 29.826582] ? lock_downgrade+0x8f0/0x8f0 [ 29.830712] ? kasan_check_read+0x11/0x20 [ 29.834925] ? do_raw_spin_unlock+0xa7/0x2f0 [ 29.839326] ? lock_acquire+0x1e4/0x540 [ 29.843283] ? worker_thread+0x3dc/0x13c0 [ 29.847422] ? lock_downgrade+0x8f0/0x8f0 [ 29.851573] ? lock_release+0xa30/0xa30 [ 29.855533] ? kasan_check_read+0x11/0x20 [ 29.859660] ? do_raw_spin_unlock+0xa7/0x2f0 [ 29.864051] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 29.868627] ? kasan_check_write+0x14/0x20 [ 29.872845] ? do_raw_spin_lock+0xc1/0x200 [ 29.877065] worker_thread+0x189/0x13c0 [ 29.881030] ? process_one_work+0x1ba0/0x1ba0 [ 29.885510] ? graph_lock+0x170/0x170 [ 29.889292] ? find_held_lock+0x36/0x1c0 [ 29.893342] ? find_held_lock+0x36/0x1c0 [ 29.897393] ? schedule+0xfb/0x450 [ 29.900917] ? __schedule+0x1ed0/0x1ed0 [ 29.904892] ? do_raw_spin_unlock+0xa7/0x2f0 [ 29.909283] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 29.913852] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 29.919371] ? __kthread_parkme+0x111/0x1d0 [ 29.923674] ? parse_args.cold.15+0x1b3/0x1b3 [ 29.928150] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.933146] ? trace_hardirqs_on+0xd/0x10 [ 29.937284] kthread+0x345/0x410 [ 29.940643] ? process_one_work+0x1ba0/0x1ba0 [ 29.945126] ? kthread_bind+0x40/0x40 [ 29.948931] ret_from_fork+0x3a/0x50 [ 29.952623] Modules linked in: [ 29.955810] Dumping ftrace buffer: [ 29.959332] (ftrace buffer empty) [ 29.963032] ---[ end trace 472b359041f047a6 ]--- [ 29.967772] RIP: 0010:__lock_acquire+0x245/0x5020 [ 29.972590] 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 76 e7 89 0f 84 42 ff [ 29.991721] RSP: 0000:ffff8801d9b36d20 EFLAGS: 00010006 [ 29.997063] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 30.004311] RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 30.011560] RBP: ffff8801d9b370a8 R08: 0000000000000001 R09: 0000000000000001 [ 30.018815] R10: ffff8801d9b2a500 R11: 0000000000000001 R12: 0000000000000001 [ 30.026061] R13: 0000000000000018 R14: ffff8801d9b2a500 R15: 0000000000000000 [ 30.033313] FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 30.041525] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.047384] CR2: 0000000020002cc0 CR3: 00000001ae03f000 CR4: 00000000001406e0 [ 30.054638] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.061973] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.069224] Kernel panic - not syncing: Fatal exception [ 30.074979] Dumping ftrace buffer: [ 30.078505] (ftrace buffer empty) [ 30.082190] Kernel Offset: disabled [ 30.085790] Rebooting in 86400 seconds..