[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.476477] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 36.491097] random: sshd: uninitialized urandom read (32 bytes read) [ 37.035382] random: sshd: uninitialized urandom read (32 bytes read) [ 38.409796] random: sshd: uninitialized urandom read (32 bytes read) [ 38.638908] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.1' (ECDSA) to the list of known hosts. [ 44.188380] 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 [ 44.342914] ================================================================== [ 44.350345] BUG: KMSAN: uninit-value in __nf_conntrack_find_get+0xc15/0x2190 [ 44.357544] CPU: 0 PID: 4610 Comm: syz-executor884 Not tainted 4.18.0-rc4+ #24 [ 44.364901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.374258] Call Trace: [ 44.376856] dump_stack+0x185/0x1e0 [ 44.380499] kmsan_report+0x195/0x2c0 [ 44.384316] __msan_warning_32+0x7d/0xe0 [ 44.388394] __nf_conntrack_find_get+0xc15/0x2190 [ 44.393250] ? __msan_poison_alloca+0x183/0x220 [ 44.397935] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 44.403305] ? hash_conntrack_raw+0x5f7/0x8c0 [ 44.407817] nf_conntrack_in+0x1674/0x2070 [ 44.412099] ipv6_conntrack_local+0xc3/0xf0 [ 44.416430] ? ipv6_conntrack_in+0xf0/0xf0 [ 44.420672] nf_hook_slow+0x15d/0x3e0 [ 44.424488] __ip6_local_out+0x64c/0x770 [ 44.428564] ? __ip6_local_out+0x770/0x770 [ 44.432806] ip6_local_out+0xa4/0x1d0 [ 44.436618] ip6_push_pending_frames+0x218/0x4d0 [ 44.441389] rawv6_sendmsg+0x45f0/0x5410 [ 44.445477] ? kmsan_set_origin_inline+0x6b/0x120 [ 44.450330] ? __msan_poison_alloca+0x183/0x220 [ 44.455005] ? __fdget+0x4e/0x60 [ 44.458387] ? compat_rawv6_ioctl+0x100/0x100 [ 44.462888] inet_sendmsg+0x3fc/0x760 [ 44.466697] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 44.472108] ? inet_getname+0x4a0/0x4a0 [ 44.476089] __sys_sendto+0x798/0x8e0 [ 44.479914] ? syscall_return_slowpath+0x108/0x800 [ 44.484862] __x64_sys_sendto+0x1a1/0x210 [ 44.489025] ? __sys_sendto+0x8e0/0x8e0 [ 44.493010] do_syscall_64+0x15b/0x230 [ 44.496923] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 44.502112] RIP: 0033:0x4459c9 [ 44.505294] Code: e8 bc e7 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 2b 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 44.524622] RSP: 002b:00007fa03df22d98 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 44.532343] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004459c9 [ 44.539618] RDX: 000000000000fedf RSI: 0000000020000000 RDI: 0000000000000004 [ 44.546890] RBP: 0000000000000000 R08: 0000000020000180 R09: 000000000000001a [ 44.554162] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006dac20 [ 44.561438] R13: 616e732f7665642f R14: 00007fa03df239c0 R15: 0000000000000001 [ 44.568719] [ 44.570343] Uninit was stored to memory at: [ 44.574679] kmsan_internal_chain_origin+0x13c/0x240 [ 44.579788] __msan_chain_origin+0x76/0xd0 [ 44.584033] __nf_conntrack_confirm+0x2700/0x3f70 [ 44.588908] ipv6_confirm+0x573/0x740 [ 44.592713] nf_hook_slow+0x15d/0x3e0 [ 44.596517] ip6_output+0x37d/0x710 [ 44.600148] ip6_local_out+0x164/0x1d0 [ 44.604038] ip6_push_pending_frames+0x218/0x4d0 [ 44.608805] rawv6_sendmsg+0x45f0/0x5410 [ 44.612873] inet_sendmsg+0x3fc/0x760 [ 44.616676] __sys_sendto+0x798/0x8e0 [ 44.620480] __x64_sys_sendto+0x1a1/0x210 [ 44.624636] do_syscall_64+0x15b/0x230 [ 44.628529] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 44.633707] [ 44.635328] Uninit was created at: [ 44.638870] kmsan_internal_poison_shadow+0xc8/0x1d0 [ 44.643980] kmsan_kmalloc+0xa1/0x120 [ 44.647785] kmem_cache_alloc+0xad2/0xbb0 [ 44.651941] __nf_conntrack_alloc+0x166/0x670 [ 44.656444] init_conntrack+0x635/0x2840 [ 44.660508] nf_conntrack_in+0x1812/0x2070 [ 44.665321] ipv6_conntrack_local+0xc3/0xf0 [ 44.669647] nf_hook_slow+0x15d/0x3e0 [ 44.673453] __ip6_local_out+0x64c/0x770 [ 44.677520] ip6_local_out+0xa4/0x1d0 [ 44.681322] ip6_push_pending_frames+0x218/0x4d0 [ 44.686088] rawv6_sendmsg+0x45f0/0x5410 [ 44.690157] inet_sendmsg+0x3fc/0x760 [ 44.693967] __sys_sendto+0x798/0x8e0 [ 44.697770] __x64_sys_sendto+0x1a1/0x210 [ 44.702018] do_syscall_64+0x15b/0x230 [ 44.705922] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 44.711102] ================================================================== [ 44.718454] Disabling lock debugging due to kernel taint [ 44.723899] Kernel panic - not syncing: panic_on_warn set ... [ 44.723899] [ 44.731276] CPU: 0 PID: 4610 Comm: syz-executor884 Tainted: G B 4.18.0-rc4+ #24 [ 44.740027] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.749389] Call Trace: [ 44.751991] dump_stack+0x185/0x1e0 [ 44.755628] panic+0x3d0/0x9b0 [ 44.758851] kmsan_report+0x2bf/0x2c0 [ 44.762668] __msan_warning_32+0x7d/0xe0 [ 44.766744] __nf_conntrack_find_get+0xc15/0x2190 [ 44.771602] ? __msan_poison_alloca+0x183/0x220 [ 44.776288] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 44.781663] ? hash_conntrack_raw+0x5f7/0x8c0 [ 44.786174] nf_conntrack_in+0x1674/0x2070 [ 44.790447] ipv6_conntrack_local+0xc3/0xf0 [ 44.794780] ? ipv6_conntrack_in+0xf0/0xf0 [ 44.799020] nf_hook_slow+0x15d/0x3e0 [ 44.802869] __ip6_local_out+0x64c/0x770 [ 44.806951] ? __ip6_local_out+0x770/0x770 [ 44.811194] ip6_local_out+0xa4/0x1d0 [ 44.815012] ip6_push_pending_frames+0x218/0x4d0 [ 44.819790] rawv6_sendmsg+0x45f0/0x5410 [ 44.823884] ? kmsan_set_origin_inline+0x6b/0x120 [ 44.828734] ? __msan_poison_alloca+0x183/0x220 [ 44.833407] ? __fdget+0x4e/0x60 [ 44.836812] ? compat_rawv6_ioctl+0x100/0x100 [ 44.841322] inet_sendmsg+0x3fc/0x760 [ 44.845134] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 44.850509] ? inet_getname+0x4a0/0x4a0 [ 44.854501] __sys_sendto+0x798/0x8e0 [ 44.858329] ? syscall_return_slowpath+0x108/0x800 [ 44.863274] __x64_sys_sendto+0x1a1/0x210 [ 44.867440] ? __sys_sendto+0x8e0/0x8e0 [ 44.871420] do_syscall_64+0x15b/0x230 [ 44.875322] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 44.880516] RIP: 0033:0x4459c9 [ 44.883702] Code: e8 bc e7 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 2b 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 44.903047] RSP: 002b:00007fa03df22d98 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 44.910767] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004459c9 [ 44.918046] RDX: 000000000000fedf RSI: 0000000020000000 RDI: 0000000000000004 [ 44.925322] RBP: 0000000000000000 R08: 0000000020000180 R09: 000000000000001a [ 44.932597] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006dac20 [ 44.939868] R13: 616e732f7665642f R14: 00007fa03df239c0 R15: 0000000000000001 [ 44.947610] Dumping ftrace buffer: [ 44.951130] (ftrace buffer empty) [ 44.954819] Kernel Offset: disabled [ 44.958426] Rebooting in 86400 seconds..