[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 38.441615] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 42.159382] random: sshd: uninitialized urandom read (32 bytes read) [ 42.537462] random: sshd: uninitialized urandom read (32 bytes read) [ 43.479416] random: sshd: uninitialized urandom read (32 bytes read) [ 171.725670] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.16' (ECDSA) to the list of known hosts. [ 177.253836] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 182.059029] hrtimer: interrupt took 175493 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 206.220473] ================================================================== [ 206.227925] BUG: KMSAN: uninit-value in __kmalloc_node_track_caller+0x667/0x11d0 [ 206.235479] CPU: 0 PID: 7872 Comm: syz-executor196 Not tainted 4.18.0-rc8+ #33 [ 206.242849] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 206.252217] Call Trace: [ 206.254817] dump_stack+0x17c/0x1c0 [ 206.258471] kmsan_report+0x188/0x2a0 [ 206.262304] __msan_warning+0x70/0xc0 [ 206.266146] __kmalloc_node_track_caller+0x667/0x11d0 [ 206.271350] ? sk_stream_alloc_skb+0x172/0xc90 [ 206.275972] __alloc_skb+0x2ce/0x9b0 [ 206.279704] ? sk_stream_alloc_skb+0x172/0xc90 [ 206.284326] sk_stream_alloc_skb+0x172/0xc90 [ 206.288741] ? tcp_stream_memory_free+0x10e/0x190 [ 206.293635] tcp_sendmsg_locked+0x2a4d/0x6250 [ 206.298197] tcp_sendmsg+0xb2/0x100 [ 206.301837] ? tcp_sendmsg_locked+0x6250/0x6250 [ 206.306530] inet_sendmsg+0x49a/0x740 [ 206.310339] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 206.315734] ? inet_getname+0x490/0x490 [ 206.319728] __sys_sendto+0x6a3/0x7c0 [ 206.324028] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 206.329426] ? schedule+0x1e0/0x2d0 [ 206.333069] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 206.338571] __x64_sys_sendto+0x1a1/0x210 [ 206.342756] ? __sys_sendto+0x7c0/0x7c0 [ 206.346730] do_syscall_64+0x15b/0x220 [ 206.350681] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 206.355882] RIP: 0033:0x44a3d9 [ 206.359064] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 9b cc fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 206.378464] RSP: 002b:00007fc976b65d98 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 206.386176] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 000000000044a3d9 [ 206.393436] RDX: 00000000895ff3b0 RSI: 0000000020000280 RDI: 0000000000000005 [ 206.400708] RBP: 00000000006dbc40 R08: 0000000020000040 R09: 000000000000001c [ 206.407997] R10: 0000000020000004 R11: 0000000000000212 R12: 00000000006dbc4c [ 206.415275] R13: 00327265636e6575 R14: 7165732f7665642f R15: 0000000000000000 [ 206.422542] [ 206.424161] Uninit was created at: [ 206.427694] kmsan_internal_poison_shadow+0xb8/0x1b0 [ 206.433020] kmsan_kmalloc+0x98/0x100 [ 206.436829] kmsan_slab_alloc+0x10/0x20 [ 206.440808] __kmalloc_node_track_caller+0xb4c/0x11d0 [ 206.446016] __alloc_skb+0x2ce/0x9b0 [ 206.449764] sk_stream_alloc_skb+0x172/0xc90 [ 206.454179] tcp_fragment+0x43b/0x1ee0 [ 206.458069] tcp_send_loss_probe+0x60f/0xad0 [ 206.462484] tcp_write_timer_handler+0x730/0xee0 [ 206.467231] tcp_write_timer+0x11e/0x270 [ 206.471296] call_timer_fn+0x270/0x5c0 [ 206.475194] __run_timers+0xd74/0x1170 [ 206.479094] run_timer_softirq+0x43/0x70 [ 206.483149] __do_softirq+0x582/0x969 [ 206.486932] ================================================================== [ 206.494300] Disabling lock debugging due to kernel taint [ 206.499786] Kernel panic - not syncing: panic_on_warn set ... [ 206.499786] [ 206.507142] CPU: 0 PID: 7872 Comm: syz-executor196 Tainted: G B 4.18.0-rc8+ #33 [ 206.515876] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 206.525221] Call Trace: [ 206.527828] dump_stack+0x17c/0x1c0 [ 206.531473] panic+0x3c3/0x9a0 [ 206.534680] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 206.540141] kmsan_report+0x29e/0x2a0 [ 206.543946] __msan_warning+0x70/0xc0 [ 206.547746] __kmalloc_node_track_caller+0x667/0x11d0 [ 206.552942] ? sk_stream_alloc_skb+0x172/0xc90 [ 206.557545] __alloc_skb+0x2ce/0x9b0 [ 206.561263] ? sk_stream_alloc_skb+0x172/0xc90 [ 206.565882] sk_stream_alloc_skb+0x172/0xc90 [ 206.570305] ? tcp_stream_memory_free+0x10e/0x190 [ 206.575153] tcp_sendmsg_locked+0x2a4d/0x6250 [ 206.579720] tcp_sendmsg+0xb2/0x100 [ 206.583378] ? tcp_sendmsg_locked+0x6250/0x6250 [ 206.588068] inet_sendmsg+0x49a/0x740 [ 206.591904] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 206.597282] ? inet_getname+0x490/0x490 [ 206.601253] __sys_sendto+0x6a3/0x7c0 [ 206.605076] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 206.610447] ? schedule+0x1e0/0x2d0 [ 206.614091] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 206.619607] __x64_sys_sendto+0x1a1/0x210 [ 206.623772] ? __sys_sendto+0x7c0/0x7c0 [ 206.627752] do_syscall_64+0x15b/0x220 [ 206.631659] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 206.636862] RIP: 0033:0x44a3d9 [ 206.640059] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 9b cc fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 206.659431] RSP: 002b:00007fc976b65d98 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 206.667139] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 000000000044a3d9 [ 206.674409] RDX: 00000000895ff3b0 RSI: 0000000020000280 RDI: 0000000000000005 [ 206.681676] RBP: 00000000006dbc40 R08: 0000000020000040 R09: 000000000000001c [ 206.688960] R10: 0000000020000004 R11: 0000000000000212 R12: 00000000006dbc4c [ 206.696247] R13: 00327265636e6575 R14: 7165732f7665642f R15: 0000000000000000 [ 206.703848] Dumping ftrace buffer: [ 206.707377] (ftrace buffer empty) [ 206.711076] Kernel Offset: disabled [ 206.714695] Rebooting in 86400 seconds..