[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   28.210710] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   32.229577] random: sshd: uninitialized urandom read (32 bytes read)
[   32.596722] random: sshd: uninitialized urandom read (32 bytes read)
[   33.668656] random: sshd: uninitialized urandom read (32 bytes read)
[   33.873022] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts.
[   39.394515] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   39.499595] ==================================================================
[   39.507109] BUG: KMSAN: uninit-value in do_ip_vs_set_ctl+0x15ac/0x2760
[   39.513774] CPU: 1 PID: 4464 Comm: syz-executor844 Not tainted 4.17.0-rc3+ #94
[   39.521111] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   39.530441] Call Trace:
[   39.533015]  dump_stack+0x185/0x1d0
[   39.536653]  ? do_ip_vs_set_ctl+0x15ac/0x2760
[   39.541132]  kmsan_report+0x142/0x240
[   39.544910]  __msan_warning_32+0x6c/0xb0
[   39.548952]  do_ip_vs_set_ctl+0x15ac/0x2760
[   39.553254]  ? rcu_all_qs+0x32/0x1f0
[   39.556945]  ? _cond_resched+0x3c/0xd0
[   39.560814]  ? rcu_all_qs+0x32/0x1f0
[   39.564510]  ? nf_setsockopt+0x3fb/0x4d0
[   39.568548]  ? local_bh_enable+0x40/0x40
[   39.572588]  ? local_bh_enable+0x40/0x40
[   39.576636]  nf_setsockopt+0x476/0x4d0
[   39.580504]  ip_setsockopt+0x24b/0x2b0
[   39.584370]  raw_setsockopt+0x2e5/0x350
[   39.588322]  ? raw_destroy+0x70/0x70
[   39.592027]  sock_common_setsockopt+0x136/0x170
[   39.596686]  ? sock_common_recvmsg+0x270/0x270
[   39.601245]  __sys_setsockopt+0x4af/0x560
[   39.605375]  __x64_sys_setsockopt+0x15c/0x1c0
[   39.609871]  do_syscall_64+0x154/0x220
[   39.613768]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   39.618960] RIP: 0033:0x43fca9
[   39.622233] RSP: 002b:00007fff7a4795b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000036
[   39.629921] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fca9
[   39.637168] RDX: 0000000000000480 RSI: 0000000000000000 RDI: 0000000000000003
[   39.644415] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   39.651661] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004015d0
[   39.659254] R13: 0000000000401660 R14: 0000000000000000 R15: 0000000000000000
[   39.666506] 
[   39.668109] Local variable description: ----arg@do_ip_vs_set_ctl
[   39.674228] Variable was created at:
[   39.677937]  do_ip_vs_set_ctl+0x93/0x2760
[   39.682076]  nf_setsockopt+0x476/0x4d0
[   39.685940] ==================================================================
[   39.693278] Disabling lock debugging due to kernel taint
[   39.698708] Kernel panic - not syncing: panic_on_warn set ...
[   39.698708] 
[   39.706058] CPU: 1 PID: 4464 Comm: syz-executor844 Tainted: G    B             4.17.0-rc3+ #94
[   39.714785] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   39.724115] Call Trace:
[   39.726684]  dump_stack+0x185/0x1d0
[   39.730291]  panic+0x39d/0x940
[   39.733472]  ? do_ip_vs_set_ctl+0x15ac/0x2760
[   39.737949]  kmsan_report+0x238/0x240
[   39.741729]  __msan_warning_32+0x6c/0xb0
[   39.745771]  do_ip_vs_set_ctl+0x15ac/0x2760
[   39.750076]  ? rcu_all_qs+0x32/0x1f0
[   39.753770]  ? _cond_resched+0x3c/0xd0
[   39.757650]  ? rcu_all_qs+0x32/0x1f0
[   39.761356]  ? nf_setsockopt+0x3fb/0x4d0
[   39.765398]  ? local_bh_enable+0x40/0x40
[   39.769451]  ? local_bh_enable+0x40/0x40
[   39.773492]  nf_setsockopt+0x476/0x4d0
[   39.777357]  ip_setsockopt+0x24b/0x2b0
[   39.781234]  raw_setsockopt+0x2e5/0x350
[   39.785187]  ? raw_destroy+0x70/0x70
[   39.788881]  sock_common_setsockopt+0x136/0x170
[   39.793528]  ? sock_common_recvmsg+0x270/0x270
[   39.798089]  __sys_setsockopt+0x4af/0x560
[   39.802219]  __x64_sys_setsockopt+0x15c/0x1c0
[   39.806716]  do_syscall_64+0x154/0x220
[   39.810585]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   39.815750] RIP: 0033:0x43fca9
[   39.818925] RSP: 002b:00007fff7a4795b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000036
[   39.826609] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fca9
[   39.833865] RDX: 0000000000000480 RSI: 0000000000000000 RDI: 0000000000000003
[   39.841113] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   39.848369] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004015d0
[   39.855615] R13: 0000000000401660 R14: 0000000000000000 R15: 0000000000000000
[   39.863354] Dumping ftrace buffer:
[   39.866877]    (ftrace buffer empty)
[   39.870563] Kernel Offset: disabled
[   39.874176] Rebooting in 86400 seconds..