[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 34.012322] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.754008] random: sshd: uninitialized urandom read (32 bytes read) [ 39.193213] random: sshd: uninitialized urandom read (32 bytes read) [ 40.613168] random: sshd: uninitialized urandom read (32 bytes read) [ 77.074449] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.33' (ECDSA) to the list of known hosts. [ 82.578641] 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 [ 87.369625] BUG: unable to handle kernel paging request at ffffc90002000011 [ 87.376790] PGD 1d4235067 P4D 1d4235067 PUD 1d4238067 PMD 1bc264067 PTE 80000001be6c1000 [ 87.385106] Oops: 0002 [#1] SMP PTI [ 87.388761] CPU: 0 PID: 4598 Comm: syz-executor376 Not tainted 4.18.0-rc5+ #29 [ 87.396153] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.405536] RIP: 0010:htab_map_alloc+0x126a/0x1da0 [ 87.410457] Code: 89 ef e8 b9 c6 41 00 48 89 c3 4d 09 e7 4c 8b 7d c8 0f 85 9a 00 00 00 4c 89 33 4d 85 f6 0f 85 bd 00 00 00 48 8b 85 70 ff ff ff <49> 89 45 00 4c 8b 65 b0 41 c7 84 24 20 03 00 00 00 00 00 00 e8 bd [ 87.429851] RSP: 0018:ffff880198f8fb40 EFLAGS: 00010246 [ 87.435241] RAX: 000060fde001b848 RBX: ffffffff8ba12000 RCX: 5555559000000000 [ 87.442512] RDX: ffffffff8ba13000 RSI: 0000000000000008 RDI: ffffc90002000011 [ 87.449783] RBP: ffff880198f8fc20 R08: 0000000000000000 R09: ffff88021fc39090 [ 87.457062] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 [ 87.464329] R13: ffffc90002000011 R14: 0000000000000000 R15: 0000000000000000 [ 87.471600] FS: 0000000000cb1940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 87.479831] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.485720] CR2: ffffc90002000011 CR3: 00000001b6bf6000 CR4: 00000000001406f0 [ 87.492994] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.500275] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.507539] Call Trace: [ 87.510216] ? htab_map_alloc_check+0x680/0x680 [ 87.514925] __do_sys_bpf+0x7e20/0xeae0 [ 87.518930] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 87.524301] ? __msan_poison_alloca+0x183/0x220 [ 87.528976] ? syscall_return_slowpath+0x108/0x800 [ 87.533923] ? prepare_exit_to_usermode+0x57/0x430 [ 87.538887] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 87.544334] ? prepare_exit_to_usermode+0x150/0x430 [ 87.549365] ? syscall_return_slowpath+0x108/0x800 [ 87.554317] __x64_sys_bpf+0xda/0x110 [ 87.558141] ? bpf_prog_get_type_dev+0x4e0/0x4e0 [ 87.562928] do_syscall_64+0x15b/0x230 [ 87.566860] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 87.572069] RIP: 0033:0x4408b9 [ 87.575257] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 87.594606] RSP: 002b:00007ffd7f2357b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 87.602356] RAX: ffffffffffffffda RBX: 00007ffd7f2357d0 RCX: 00000000004408b9 [ 87.609646] RDX: 000000000000002c RSI: 0000000020214fd4 RDI: 0000000000000000 [ 87.616932] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 87.624216] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402140 [ 87.631494] R13: 00000000004021d0 R14: 0000000000000000 R15: 0000000000000000 [ 87.638791] Modules linked in: [ 87.642016] Dumping ftrace buffer: [ 87.645560] (ftrace buffer empty) [ 87.649270] CR2: ffffc90002000011 [ 87.652731] ---[ end trace 3be5a6741ea1336b ]--- [ 87.657510] RIP: 0010:htab_map_alloc+0x126a/0x1da0 [ 87.662426] Code: 89 ef e8 b9 c6 41 00 48 89 c3 4d 09 e7 4c 8b 7d c8 0f 85 9a 00 00 00 4c 89 33 4d 85 f6 0f 85 bd 00 00 00 48 8b 85 70 ff ff ff <49> 89 45 00 4c 8b 65 b0 41 c7 84 24 20 03 00 00 00 00 00 00 e8 bd [ 87.681791] RSP: 0018:ffff880198f8fb40 EFLAGS: 00010246 [ 87.687188] RAX: 000060fde001b848 RBX: ffffffff8ba12000 RCX: 5555559000000000 [ 87.694468] RDX: ffffffff8ba13000 RSI: 0000000000000008 RDI: ffffc90002000011 [ 87.701746] RBP: ffff880198f8fc20 R08: 0000000000000000 R09: ffff88021fc39090 [ 87.709043] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 [ 87.716314] R13: ffffc90002000011 R14: 0000000000000000 R15: 0000000000000000 [ 87.723597] FS: 0000000000cb1940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 87.731839] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.737732] CR2: ffffc90002000011 CR3: 00000001b6bf6000 CR4: 00000000001406f0 [ 87.745007] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.752296] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.759575] Kernel panic - not syncing: Fatal exception [ 87.765365] Dumping ftrace buffer: [ 87.768907] (ftrace buffer empty) [ 87.772633] Kernel Offset: disabled [ 87.776269] Rebooting in 86400 seconds..