[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 29.623291] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 29.938804] random: sshd: uninitialized urandom read (32 bytes read) [ 30.114623] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 31.224633] random: sshd: uninitialized urandom read (32 bytes read) [ 42.965643] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts. [ 48.756607] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 48.867249] BUG: unable to handle kernel paging request at ffff87fe6ebd6c44 [ 48.874431] PGD 0 P4D 0 [ 48.877116] Oops: 0000 [#1] SMP PTI [ 48.880740] Dumping ftrace buffer: [ 48.884265] (ftrace buffer empty) [ 48.887963] Modules linked in: [ 48.891170] CPU: 1 PID: 4479 Comm: syz-executor447 Not tainted 4.17.0+ #8 [ 48.898103] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.907490] RIP: 0010:process_preds+0x42ed/0x5060 [ 48.912342] RSP: 0018:ffff8801976ff8f0 EFLAGS: 00010246 [ 48.917716] RAX: ffff8801a4932e40 RBX: ffff87fe6ebd6c44 RCX: ffff880000000000 [ 48.924979] RDX: ffff8801a4934e24 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 [ 48.932252] RBP: ffff8801976ffad0 R08: 0000000000000094 R09: 0000000000000002 [ 48.939522] R10: 0000000000000002 R11: 0000000000000000 R12: fffffffcca2a3e00 [ 48.946787] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 48.954155] FS: 00000000006fb880(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 48.962391] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.968271] CR2: ffff87fe6ebd6c44 CR3: 000000019a286000 CR4: 00000000001406e0 [ 48.975549] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.982822] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.990094] Call Trace: [ 48.992729] ? _cond_resched+0x3c/0xd0 [ 48.996647] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 49.002112] ftrace_profile_set_filter+0x2aa/0x6a0 [ 49.007075] perf_ioctl+0x1ca8/0x5870 [ 49.011192] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 49.016664] ? fd_install+0x147/0x3d0 [ 49.020502] ? kmsan_set_origin_inline+0x6b/0x120 [ 49.025389] ? __msan_poison_alloca+0x15c/0x1d0 [ 49.030083] ? __x64_sys_ioctl+0x280/0x320 [ 49.034334] ? do_vfs_ioctl+0x160/0x24b0 [ 49.038412] ? perf_poll+0x370/0x370 [ 49.042141] do_vfs_ioctl+0xcbd/0x24b0 [ 49.046053] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 49.051426] ? __fget_light+0x1f5/0x700 [ 49.055429] ? security_file_ioctl+0x5e/0x200 [ 49.059959] __x64_sys_ioctl+0x280/0x320 [ 49.064073] ? ksys_ioctl+0x260/0x260 [ 49.067879] do_syscall_64+0x15b/0x230 [ 49.071789] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 49.076969] RIP: 0033:0x43fdb9 [ 49.080153] RSP: 002b:00007ffcf45df3e8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 49.087866] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdb9 [ 49.095135] RDX: 0000000020000040 RSI: 0000000040082406 RDI: 0000000000000003 [ 49.102409] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 49.110747] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004016e0 [ 49.118030] R13: 0000000000401770 R14: 0000000000000000 R15: 0000000000000000 [ 49.125300] Code: 2c 44 89 b4 24 b0 00 00 00 8b 02 89 44 24 08 49 c1 e4 04 4c 0b 6c 24 68 48 8b 84 24 88 00 00 00 4a 8d 5c 20 04 0f 85 a5 00 00 00 <44> 8b 33 48 89 df e8 e8 2c 4d 00 8b 00 41 09 c7 8b 5c 24 30 74 [ 49.144661] RIP: process_preds+0x42ed/0x5060 RSP: ffff8801976ff8f0 [ 49.150966] CR2: ffff87fe6ebd6c44 [ 49.154418] ---[ end trace 51b1602f202978e7 ]--- [ 49.159174] Kernel panic - not syncing: Fatal exception [ 49.164968] Dumping ftrace buffer: [ 49.168510] (ftrace buffer empty) [ 49.172241] Kernel Offset: disabled [ 49.175869] Rebooting in 86400 seconds..