[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 37.510794] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 42.359150] random: sshd: uninitialized urandom read (32 bytes read) [ 42.791539] random: sshd: uninitialized urandom read (32 bytes read) [ 43.676938] random: sshd: uninitialized urandom read (32 bytes read) [ 49.865006] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.18' (ECDSA) to the list of known hosts. [ 55.510976] 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 [ 56.515685] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 [ 56.524006] PGD 80000001a2ab2067 P4D 80000001a2ab2067 PUD 1a0939067 PMD 0 [ 56.531066] Oops: 0000 [#1] SMP PTI [ 56.534914] CPU: 1 PID: 4862 Comm: kworker/1:36 Not tainted 4.18.0-rc8+ #34 [ 56.542026] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.551401] Workqueue: events smc_tcp_listen_work [ 56.556283] RIP: 0010:inet_accept+0xc6/0x8e0 [ 56.560688] Code: 44 8b 2a 48 8d 7d cc e8 68 69 8e fa c7 00 00 00 00 00 c7 45 cc ea ff ff ff 4c 89 75 c0 4d 8d 76 28 4d 85 e4 0f 85 6e 05 00 00 <49> 8b 1e 4c 89 f7 e8 5f 69 8e fa 48 83 c3 20 48 83 38 00 0f 85 62 [ 56.580273] RSP: 0018:ffff88019bdcfa70 EFLAGS: 00010246 [ 56.585672] RAX: ffff88019bddfacc RBX: ffff8801c3cc18e0 RCX: ffff88019ba6facc [ 56.592952] RDX: ffff88019ba6facc RSI: aaaaaaaaaaaab000 RDI: ffffea0009a72da0 [ 56.600373] RBP: ffff88019bdcfb00 R08: 0000000000480020 R09: 0000000000000002 [ 56.607656] R10: 0000000000000000 R11: ffffffff87306c60 R12: 0000000000000000 [ 56.614931] R13: 0000000000000000 R14: 0000000000000028 R15: ffff8801b213a678 [ 56.622209] FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 56.630457] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.636342] CR2: 0000000000000028 CR3: 00000001b7b6a000 CR4: 00000000001406e0 [ 56.643616] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.651032] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.658408] Call Trace: [ 56.661060] ? inet_stream_connect+0x170/0x170 [ 56.665653] kernel_accept+0x1e9/0x700 [ 56.669675] smc_tcp_listen_work+0x2a1/0x13b0 [ 56.674205] ? __list_del_entry_valid+0x123/0x440 [ 56.679058] ? smc_rx_data_available+0x70/0x70 [ 56.683653] process_one_work+0x1605/0x1f40 [ 56.688153] worker_thread+0x11a2/0x2590 [ 56.692237] kthread+0x44d/0x480 [ 56.695618] ? process_one_work+0x1f40/0x1f40 [ 56.700216] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 56.705741] ? kthread_blkcg+0xf0/0xf0 [ 56.709645] ret_from_fork+0x35/0x40 [ 56.713363] Modules linked in: [ 56.716569] Dumping ftrace buffer: [ 56.720106] (ftrace buffer empty) [ 56.724090] CR2: 0000000000000028 [ 56.727560] ---[ end trace 837376647a02de27 ]--- [ 56.732331] RIP: 0010:inet_accept+0xc6/0x8e0 [ 56.736984] Code: 44 8b 2a 48 8d 7d cc e8 68 69 8e fa c7 00 00 00 00 00 c7 45 cc ea ff ff ff 4c 89 75 c0 4d 8d 76 28 4d 85 e4 0f 85 6e 05 00 00 <49> 8b 1e 4c 89 f7 e8 5f 69 8e fa 48 83 c3 20 48 83 38 00 0f 85 62 [ 56.756666] RSP: 0018:ffff88019bdcfa70 EFLAGS: 00010246 [ 56.762047] RAX: ffff88019bddfacc RBX: ffff8801c3cc18e0 RCX: ffff88019ba6facc [ 56.769323] RDX: ffff88019ba6facc RSI: aaaaaaaaaaaab000 RDI: ffffea0009a72da0 [ 56.776596] RBP: ffff88019bdcfb00 R08: 0000000000480020 R09: 0000000000000002 [ 56.783866] R10: 0000000000000000 R11: ffffffff87306c60 R12: 0000000000000000 [ 56.791266] R13: 0000000000000000 R14: 0000000000000028 R15: ffff8801b213a678 [ 56.798544] FS: 0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 56.806933] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.812828] CR2: 0000000000000028 CR3: 00000001b7b6a000 CR4: 00000000001406e0 [ 56.820107] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.827588] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.834989] Kernel panic - not syncing: Fatal exception [ 56.840790] Dumping ftrace buffer: [ 56.844328] (ftrace buffer empty) [ 56.848036] Kernel Offset: disabled [ 56.851666] Rebooting in 86400 seconds..