[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 28.210710] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?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..