[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   17.601718] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   20.271141] random: sshd: uninitialized urandom read (32 bytes read)
[   20.526433] random: sshd: uninitialized urandom read (32 bytes read)
[   21.316752] random: sshd: uninitialized urandom read (32 bytes read)
[   32.890382] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.63' (ECDSA) to the list of known hosts.
[   38.328352] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   38.416357] WARNING: CPU: 1 PID: 4508 at fs/open.c:778 do_dentry_open+0x4ad/0xe40
[   38.423982] Kernel panic - not syncing: panic_on_warn set ...
[   38.423982] 
[   38.431338] CPU: 1 PID: 4508 Comm: syz-executor867 Not tainted 4.17.0+ #90
[   38.438332] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   38.447895] Call Trace:
[   38.450467]  dump_stack+0x1b9/0x294
[   38.454074]  ? dump_stack_print_info.cold.2+0x52/0x52
[   38.459243]  ? do_dentry_open+0x440/0xe40
[   38.463369]  panic+0x22f/0x4de
[   38.466538]  ? add_taint.cold.5+0x16/0x16
[   38.470665]  ? __warn.cold.8+0x148/0x1b3
[   38.474699]  ? __warn.cold.8+0x117/0x1b3
[   38.478736]  ? do_dentry_open+0x4ad/0xe40
[   38.482861]  __warn.cold.8+0x163/0x1b3
[   38.486724]  ? do_dentry_open+0x4ad/0xe40
[   38.490849]  report_bug+0x252/0x2d0
[   38.494457]  do_error_trap+0x1fc/0x4d0
[   38.498323]  ? math_error+0x3f0/0x3f0
[   38.502106]  ? lock_downgrade+0x8e0/0x8e0
[   38.506233]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   38.511064]  do_invalid_op+0x1b/0x20
[   38.514755]  invalid_op+0x14/0x20
[   38.518192] RIP: 0010:do_dentry_open+0x4ad/0xe40
[   38.522919] Code: 7b 28 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 15 08 00 00 48 c7 43 28 00 00 00 00 e8 f3 6d ba ff <0f> 0b e8 ec 6d ba ff 48 8d 43 18 41 be ed ff ff ff 48 89 45 c0 e9 
[   38.542079] RSP: 0018:ffff8801afcaf7c8 EFLAGS: 00010293
[   38.547419] RAX: ffff8801afe08400 RBX: ffff8801b099e0c0 RCX: ffffffff81bfccf6
[   38.554665] RDX: 0000000000000000 RSI: ffffffff81bfcf6d RDI: ffff8801b099e0e8
[   38.561910] RBP: ffff8801afcaf840 R08: ffff8801afe08400 R09: ffffed0036aa2afc
[   38.569157] R10: ffffed0036aa2afc R11: ffff8801b55157e3 R12: ffff8801ab28d4b0
[   38.576412] R13: ffff8801ab28d6a8 R14: 0000000000000000 R15: ffff8801b099e13c
[   38.583665]  ? do_dentry_open+0x236/0xe40
[   38.587788]  ? do_dentry_open+0x4ad/0xe40
[   38.591914]  ? do_dentry_open+0x4ad/0xe40
[   38.596040]  ? security_inode_permission+0xd2/0x100
[   38.601038]  vfs_open+0x139/0x230
[   38.604470]  path_openat+0x1717/0x4dc0
[   38.608342]  ? path_lookupat.isra.44+0xbd0/0xbd0
[   38.613075]  ? find_held_lock+0x36/0x1c0
[   38.617115]  ? lock_downgrade+0x8e0/0x8e0
[   38.621238]  ? do_sys_open+0x39a/0x740
[   38.625103]  ? kasan_check_read+0x11/0x20
[   38.629225]  ? do_raw_spin_unlock+0x9e/0x2e0
[   38.633608]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   38.638168]  ? __lock_is_held+0xb5/0x140
[   38.642210]  ? _raw_spin_unlock+0x22/0x30
[   38.646333]  ? __alloc_fd+0x346/0x700
[   38.650107]  ? usercopy_warn+0x120/0x120
[   38.654146]  ? exit_files+0xb0/0xb0
[   38.657752]  do_filp_open+0x249/0x350
[   38.661532]  ? may_open_dev+0x100/0x100
[   38.665496]  ? get_unused_fd_flags+0x121/0x190
[   38.670052]  ? getname_flags+0xd0/0x5a0
[   38.674007]  ? __alloc_fd+0x700/0x700
[   38.677789]  do_sys_open+0x56f/0x740
[   38.681492]  ? filp_open+0x80/0x80
[   38.685013]  __x64_sys_openat+0x9d/0x100
[   38.689060]  do_syscall_64+0x1b1/0x800
[   38.692927]  ? syscall_return_slowpath+0x5c0/0x5c0
[   38.697835]  ? syscall_return_slowpath+0x30f/0x5c0
[   38.702743]  ? entry_SYSCALL_64_after_hwframe+0x59/0xbe
[   38.708085]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   38.712909]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   38.718074] RIP: 0033:0x43ff09
[   38.721238] 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 6b 45 00 00 c3 66 2e 0f 1f 84 00 00 00 00 
[   38.740392] RSP: 002b:00007ffe4eafe4f8 EFLAGS: 00000217 ORIG_RAX: 0000000000000101
[   38.748074] RAX: ffffffffffffffda RBX: 2f30656c69662f2e RCX: 000000000043ff09
[   38.755318] RDX: 0000000000000040 RSI: 0000000020000100 RDI: ffffffffffffff9c
[   38.762562] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[   38.769808] R10: 0000000000000004 R11: 0000000000000217 R12: 0000000000401830
[   38.777055] R13: 00000000004018c0 R14: 0000000000000000 R15: 0000000000000000
[   38.784772] Dumping ftrace buffer:
[   38.788371]    (ftrace buffer empty)
[   38.792060] Kernel Offset: disabled
[   38.795667] Rebooting in 86400 seconds..