[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.464076] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.599499] random: sshd: uninitialized urandom read (32 bytes read) [ 19.993069] random: sshd: uninitialized urandom read (32 bytes read) [ 20.708089] random: sshd: uninitialized urandom read (32 bytes read) [ 23.932821] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.5' (ECDSA) to the list of known hosts. [ 29.383414] 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 [ 30.113298] kasan: CONFIG_KASAN_INLINE enabled [ 30.118009] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.125427] general protection fault: 0000 [#1] SMP KASAN [ 30.130953] CPU: 0 PID: 5037 Comm: kworker/0:88 Not tainted 4.18.0-rc5-next-20180720+ #12 [ 30.139251] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.148606] Workqueue: events smc_tcp_listen_work [ 30.153433] RIP: 0010:kernel_accept+0x5a/0x310 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.157987] Code: 48 c1 ea 03 80 3c 02 00 0f 85 4a 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 20 48 8d bb 48 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 14 02 00 00 48 8d 7b 10 0f b6 [ 30.177106] RSP: 0018:ffff8801b80bf5a8 EFLAGS: 00010206 [ 30.182460] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 30.189721] RDX: 0000000000000069 RSI: ffffffff85f5e72f RDI: 0000000000000348 [ 30.196969] RBP: ffff8801b80bf5d8 R08: 0000000000000000 R09: ffffed0037017e61 [ 30.204225] R10: ffffed0037017e61 R11: 0000000000000003 R12: ffff8801b80bf688 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.211476] R13: ffff8801a7d1e140 R14: 0000000000000000 R15: ffff8801b80bf708 [ 30.218726] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 30.226942] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.232801] CR2: 0000000020002c00 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 30.240065] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.247314] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.254560] Call Trace: [ 30.257139] smc_tcp_listen_work+0x222/0xef0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.261537] ? smc_connect_rdma+0xa40/0xa40 [ 30.265841] ? lock_release+0xa30/0xa30 [ 30.269815] ? kasan_check_read+0x11/0x20 [ 30.273947] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 30.278506] ? read_word_at_a_time+0x20/0x20 [ 30.282898] ? compat_start_thread+0x80/0x80 [ 30.287289] process_one_work+0xc73/0x1ba0 [ 30.291500] ? trace_hardirqs_on+0x10/0x10 [ 30.295729] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 30.300473] ? lock_repin_lock+0x430/0x430 [ 30.304689] ? __sched_text_start+0x8/0x8 [ 30.308813] ? lock_downgrade+0x8f0/0x8f0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.312952] ? lock_acquire+0x1e4/0x540 [ 30.316912] ? __update_idle_core+0x304/0x610 [ 30.321415] ? kasan_check_write+0x14/0x20 [ 30.325641] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 30.330639] ? lock_downgrade+0x8f0/0x8f0 [ 30.334765] ? lock_acquire+0x1e4/0x540 [ 30.338809] ? worker_thread+0x3dc/0x13c0 [ 30.342933] ? lock_downgrade+0x8f0/0x8f0 [ 30.347058] ? lock_release+0xa30/0xa30 [ 30.351013] ? kasan_check_read+0x11/0x20 [ 30.355143] ? do_raw_spin_unlock+0xa7/0x2f0 [ 30.359536] ? do_raw_spin_trylock+0x1c0/0x1c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.364118] ? kasan_check_write+0x14/0x20 [ 30.368331] ? do_raw_spin_lock+0xc1/0x200 [ 30.372546] worker_thread+0x189/0x13c0 [ 30.376501] ? process_one_work+0x1ba0/0x1ba0 [ 30.380983] ? __sched_text_start+0x8/0x8 [ 30.385122] ? finish_task_switch+0x1d3/0x870 [ 30.389612] ? lock_acquire+0x1e4/0x540 [ 30.393576] ? __kthread_parkme+0xd7/0x1b0 [ 30.397791] ? lock_downgrade+0x8f0/0x8f0 [ 30.402617] ? kasan_check_read+0x11/0x20 [ 30.406742] ? do_raw_spin_unlock+0xa7/0x2f0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.411139] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 30.415699] ? kasan_check_write+0x14/0x20 [ 30.419922] ? trace_hardirqs_on+0xd/0x10 [ 30.424052] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 30.429569] ? __kthread_parkme+0x106/0x1b0 [ 30.433870] kthread+0x345/0x410 [ 30.437217] ? process_one_work+0x1ba0/0x1ba0 [ 30.441696] ? kthread_bind+0x40/0x40 [ 30.445588] ret_from_fork+0x3a/0x50 [ 30.449288] Modules linked in: [ 30.452459] Dumping ftrace buffer: [ 30.455971] (ftrace buffer empty) [ 30.459735] ---[ end trace fa36432b8f162f1d ]--- executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.464527] RIP: 0010:kernel_accept+0x5a/0x310 [ 30.469103] Code: 48 c1 ea 03 80 3c 02 00 0f 85 4a 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 20 48 8d bb 48 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 14 02 00 00 48 8d 7b 10 0f b6 [ 30.488267] RSP: 0018:ffff8801b80bf5a8 EFLAGS: 00010206 [ 30.493624] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 30.500894] RDX: 0000000000000069 RSI: ffffffff85f5e72f RDI: 0000000000000348 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.508158] RBP: ffff8801b80bf5d8 R08: 0000000000000000 R09: ffffed0037017e61 [ 30.515622] R10: ffffed0037017e61 R11: 0000000000000003 R12: ffff8801b80bf688 [ 30.522893] R13: ffff8801a7d1e140 R14: 0000000000000000 R15: ffff8801b80bf708 [ 30.530185] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 30.538489] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.544373] CR2: 0000000020002c00 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 30.551638] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 executing program executing program [ 30.558910] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.566193] Kernel panic - not syncing: Fatal exception [ 30.571980] Dumping ftrace buffer: [ 30.575496] (ftrace buffer empty) [ 30.579183] Kernel Offset: disabled [ 30.582791] Rebooting in 86400 seconds..