[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[ 29.663401] 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: [ 34.399977] random: sshd: uninitialized urandom read (32 bytes read)
[ 34.824969] random: sshd: uninitialized urandom read (32 bytes read)
[ 35.895396] random: sshd: uninitialized urandom read (32 bytes read)
[ 36.109218] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.61' (ECDSA) to the list of known hosts.
[ 41.624800] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
executing program
executing program
[ 41.734262] ==================================================================
[ 41.741689] BUG: KMSAN: uninit-value in fib4_rule_match+0x6eb/0x740
[ 41.748084] CPU: 1 PID: 4523 Comm: syz-executor867 Not tainted 4.17.0-rc5+ #101
[ 41.755512] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 41.764849] Call Trace:
[ 41.767411]
[ 41.769544] dump_stack+0x185/0x1d0
[ 41.773166] ? fib4_rule_match+0x6eb/0x740
[ 41.777388] kmsan_report+0x149/0x260
[ 41.781181] __msan_warning_32+0x6e/0xc0
[ 41.785223] fib4_rule_match+0x6eb/0x740
[ 41.789265] ? fib4_rule_suppress+0x450/0x450
[ 41.793748] fib_rules_lookup+0xb0c/0xe50
[ 41.797975] __fib_lookup+0x1bc/0x360
[ 41.801768] fib_validate_source+0xc23/0x1d50
[ 41.806257] ip_route_input_rcu+0x3592/0x6280
[ 41.810741] ? __inet_lookup_established+0xb4d/0xbb0
[ 41.815833] ip_route_input_noref+0x10e/0x140
[ 41.820317] ip_rcv_finish+0x631/0x1d00
[ 41.824277] ? __msan_metadata_ptr_for_load_2+0x10/0x20
[ 41.829623] ? nf_hook_slow+0x36f/0x3d0
[ 41.833584] ip_rcv+0x118f/0x16d0
[ 41.837031] ? ip_rcv+0x16d0/0x16d0
[ 41.840658] __netif_receive_skb_core+0x47df/0x4a90
[ 41.845662] ? ip_local_deliver_finish+0xec0/0xec0
[ 41.850591] netif_receive_skb_internal+0x49d/0x630
[ 41.855611] napi_gro_receive+0x6a2/0xb50
[ 41.859758] receive_buf+0x4be2/0x6700
[ 41.863635] ? kmsan_set_origin+0x9e/0x160
[ 41.867857] virtnet_poll+0x98c/0x1520
[ 41.871725] ? kmsan_set_origin_inline+0x6b/0x120
[ 41.876553] ? refill_work+0x2c0/0x2c0
[ 41.880429] net_rx_action+0x7c1/0x1a70
[ 41.884392] ? net_tx_action+0xab0/0xab0
[ 41.888445] __do_softirq+0x56d/0x93d
[ 41.892230] irq_exit+0x202/0x240
[ 41.895665] exiting_irq+0xe/0x10
[ 41.899099] smp_apic_timer_interrupt+0x64/0x90
[ 41.903748] apic_timer_interrupt+0xf/0x20
[ 41.907957]
[ 41.910175] RIP: 0010:__msan_poison_alloca+0x14c/0x1d0
[ 41.915427] RSP: 0018:ffff8801a9cff140 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 41.923119] RAX: 0000000092a00096 RBX: 0000000092a00096 RCX: ffff8801a9cff180
[ 41.930392] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000047d06839
[ 41.937654] RBP: ffff8801a9cff1d8 R08: 0000000001080020 R09: 0000000000000002
[ 41.944909] R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000
[ 41.952173] R13: ffffffff8af44350 R14: 0000000000000246 R15: ffff8801ce511d40
[ 41.959444] ? notify_rule_change+0x257/0x460
[ 41.963936] ? fib_nl_fill_rule+0x178/0x1f50
[ 41.968327] ? notify_rule_change+0x257/0x460
[ 41.972808] ? notify_rule_change+0x257/0x460
[ 41.977289] fib_nl_fill_rule+0x178/0x1f50
[ 41.981527] notify_rule_change+0x257/0x460
[ 41.985857] fib_nl_newrule+0x47d1/0x49b0
[ 41.989997] ? kmsan_set_origin_inline+0x6b/0x120
[ 41.994842] ? _cond_resched+0x3c/0xd0
[ 41.998719] ? fib_rules_seq_read+0x410/0x410
[ 42.003213] rtnetlink_rcv_msg+0xa32/0x1560
[ 42.007524] ? do_syscall_64+0x154/0x220
[ 42.011573] ? __x64_sys_sendmsg+0x331/0x460
[ 42.015970] ? do_syscall_64+0x154/0x220
[ 42.020022] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 42.025383] ? __msan_poison_alloca+0x15c/0x1d0
[ 42.030046] ? _raw_spin_unlock_bh+0x57/0x70
[ 42.034460] ? __local_bh_enable_ip+0x3b/0x140
[ 42.039038] ? _raw_spin_unlock_bh+0x57/0x70
[ 42.043454] ? kmsan_set_origin_inline+0x6b/0x120
[ 42.048281] ? kmsan_set_origin+0x9e/0x160
[ 42.052506] netlink_rcv_skb+0x378/0x600
[ 42.056550] ? rtnetlink_bind+0x120/0x120
[ 42.060681] rtnetlink_rcv+0x50/0x60
[ 42.064379] netlink_unicast+0x166b/0x1740
[ 42.068598] ? rtnetlink_net_exit+0xa0/0xa0
[ 42.072904] netlink_sendmsg+0x1072/0x1370
[ 42.077127] ? netlink_getsockopt+0xc80/0xc80
[ 42.081611] ___sys_sendmsg+0xec0/0x1310
[ 42.085662] ? __fdget+0x4e/0x60
[ 42.089019] ? __fget_light+0x56/0x710
[ 42.092897] ? __fdget+0x4e/0x60
[ 42.096244] ? __fget_light+0x1dc/0x710
[ 42.100224] ? __msan_metadata_ptr_for_load_4+0x10/0x20
[ 42.105571] ? __fget_light+0x1f5/0x710
[ 42.109531] __x64_sys_sendmsg+0x331/0x460
[ 42.113772] do_syscall_64+0x154/0x220
[ 42.117641] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 42.122824] RIP: 0033:0x440049
[ 42.125994] RSP: 002b:00007ffdd28a01f8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e
[ 42.133691] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440049
[ 42.140946] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000009
[ 42.148198] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
[ 42.155471] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401970
[ 42.162728] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000
[ 42.169998]
[ 42.171629] Local variable description: ----fl4.i@fib_validate_source
[ 42.178181] Variable was created at:
[ 42.181882] fib_validate_source+0x127/0x1d50
[ 42.186370] ip_route_input_rcu+0x3592/0x6280
[ 42.190841] ==================================================================
[ 42.198191] Disabling lock debugging due to kernel taint
[ 42.203626] Kernel panic - not syncing: panic_on_warn set ...
[ 42.203626]
[ 42.210986] CPU: 1 PID: 4523 Comm: syz-executor867 Tainted: G B 4.17.0-rc5+ #101
[ 42.219812] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 42.229152] Call Trace:
[ 42.231722]
[ 42.233860] dump_stack+0x185/0x1d0
[ 42.237480] panic+0x39d/0x940
[ 42.240661] ? fib4_rule_match+0x6eb/0x740
[ 42.244876] kmsan_report+0x260/0x260
[ 42.248656] __msan_warning_32+0x6e/0xc0
[ 42.252698] fib4_rule_match+0x6eb/0x740
[ 42.256739] ? fib4_rule_suppress+0x450/0x450
[ 42.261216] fib_rules_lookup+0xb0c/0xe50
[ 42.265350] __fib_lookup+0x1bc/0x360
[ 42.269143] fib_validate_source+0xc23/0x1d50
[ 42.273634] ip_route_input_rcu+0x3592/0x6280
[ 42.278133] ? __inet_lookup_established+0xb4d/0xbb0
[ 42.283222] ip_route_input_noref+0x10e/0x140
[ 42.287702] ip_rcv_finish+0x631/0x1d00
[ 42.291659] ? __msan_metadata_ptr_for_load_2+0x10/0x20
[ 42.297008] ? nf_hook_slow+0x36f/0x3d0
[ 42.300975] ip_rcv+0x118f/0x16d0
[ 42.304412] ? ip_rcv+0x16d0/0x16d0
[ 42.308037] __netif_receive_skb_core+0x47df/0x4a90
[ 42.313062] ? ip_local_deliver_finish+0xec0/0xec0
[ 42.317993] netif_receive_skb_internal+0x49d/0x630
[ 42.323018] napi_gro_receive+0x6a2/0xb50
[ 42.327168] receive_buf+0x4be2/0x6700
[ 42.331049] ? kmsan_set_origin+0x9e/0x160
[ 42.335285] virtnet_poll+0x98c/0x1520
[ 42.339155] ? kmsan_set_origin_inline+0x6b/0x120
[ 42.343991] ? refill_work+0x2c0/0x2c0
[ 42.347864] net_rx_action+0x7c1/0x1a70
[ 42.351825] ? net_tx_action+0xab0/0xab0
[ 42.355881] __do_softirq+0x56d/0x93d
[ 42.359674] irq_exit+0x202/0x240
[ 42.363109] exiting_irq+0xe/0x10
[ 42.366631] smp_apic_timer_interrupt+0x64/0x90
[ 42.371280] apic_timer_interrupt+0xf/0x20
[ 42.375492]
[ 42.377713] RIP: 0010:__msan_poison_alloca+0x14c/0x1d0
[ 42.382969] RSP: 0018:ffff8801a9cff140 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 42.390662] RAX: 0000000092a00096 RBX: 0000000092a00096 RCX: ffff8801a9cff180
[ 42.397919] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000047d06839
[ 42.405180] RBP: ffff8801a9cff1d8 R08: 0000000001080020 R09: 0000000000000002
[ 42.412438] R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000
[ 42.419694] R13: ffffffff8af44350 R14: 0000000000000246 R15: ffff8801ce511d40
[ 42.426963] ? notify_rule_change+0x257/0x460
[ 42.431444] ? fib_nl_fill_rule+0x178/0x1f50
[ 42.435837] ? notify_rule_change+0x257/0x460
[ 42.440321] ? notify_rule_change+0x257/0x460
[ 42.444804] fib_nl_fill_rule+0x178/0x1f50
[ 42.449036] notify_rule_change+0x257/0x460
[ 42.453351] fib_nl_newrule+0x47d1/0x49b0
[ 42.457490] ? kmsan_set_origin_inline+0x6b/0x120
[ 42.462318] ? _cond_resched+0x3c/0xd0
[ 42.466192] ? fib_rules_seq_read+0x410/0x410
[ 42.470669] rtnetlink_rcv_msg+0xa32/0x1560
[ 42.475008] ? do_syscall_64+0x154/0x220
[ 42.479074] ? __x64_sys_sendmsg+0x331/0x460
[ 42.483468] ? do_syscall_64+0x154/0x220
[ 42.487512] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 42.492857] ? __msan_poison_alloca+0x15c/0x1d0
[ 42.497510] ? _raw_spin_unlock_bh+0x57/0x70
[ 42.501910] ? __local_bh_enable_ip+0x3b/0x140
[ 42.506476] ? _raw_spin_unlock_bh+0x57/0x70
[ 42.510882] ? kmsan_set_origin_inline+0x6b/0x120
[ 42.515718] ? kmsan_set_origin+0x9e/0x160
[ 42.519944] netlink_rcv_skb+0x378/0x600
[ 42.523990] ? rtnetlink_bind+0x120/0x120
[ 42.528143] rtnetlink_rcv+0x50/0x60
[ 42.531842] netlink_unicast+0x166b/0x1740
[ 42.536064] ? rtnetlink_net_exit+0xa0/0xa0
[ 42.540370] netlink_sendmsg+0x1072/0x1370
[ 42.544588] ? netlink_getsockopt+0xc80/0xc80
[ 42.549073] ___sys_sendmsg+0xec0/0x1310
[ 42.553118] ? __fdget+0x4e/0x60
[ 42.556466] ? __fget_light+0x56/0x710
[ 42.560330] ? __fdget+0x4e/0x60
[ 42.563674] ? __fget_light+0x1dc/0x710
[ 42.567632] ? __msan_metadata_ptr_for_load_4+0x10/0x20
[ 42.572976] ? __fget_light+0x1f5/0x710
[ 42.576941] __x64_sys_sendmsg+0x331/0x460
[ 42.581160] do_syscall_64+0x154/0x220
[ 42.585043] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 42.590232] RIP: 0033:0x440049
[ 42.593411] RSP: 002b:00007ffdd28a01f8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e
[ 42.601102] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440049
[ 42.608363] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000009
[ 42.615620] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
[ 42.622882] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401970
[ 42.630147] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000
[ 42.637911] Dumping ftrace buffer:
[ 42.641430] (ftrace buffer empty)
[ 42.645116] Kernel Offset: disabled
[ 42.648720] Rebooting in 86400 seconds..