[ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 129.975145][ T8435] bash (8435) used greatest stack depth: 4048 bytes left Warning: Permanently added '10.128.10.39' (ECDSA) to the list of known hosts. executing program [ 140.537957][ T8467] ===================================================== [ 140.545034][ T8467] BUG: KMSAN: uninit-value in netlink_policy_dump_start+0x137d/0x1520 [ 140.553208][ T8467] CPU: 0 PID: 8467 Comm: syz-executor169 Not tainted 5.8.0-rc5-syzkaller #0 [ 140.561850][ T8467] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 140.571879][ T8467] Call Trace: [ 140.575165][ T8467] dump_stack+0x21c/0x280 [ 140.579483][ T8467] kmsan_report+0xf7/0x1e0 [ 140.583898][ T8467] __msan_warning+0x58/0xa0 [ 140.588425][ T8467] netlink_policy_dump_start+0x137d/0x1520 [ 140.594223][ T8467] ctrl_dumppolicy+0x201/0x1610 [ 140.599153][ T8467] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 140.605702][ T8467] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 140.611487][ T8467] ? ctrl_dumpfamily+0x610/0x610 [ 140.616423][ T8467] genl_lock_dumpit+0xdb/0x150 [ 140.621166][ T8467] ? genl_start+0x970/0x970 [ 140.625646][ T8467] netlink_dump+0xb73/0x1cb0 [ 140.630228][ T8467] ? kmsan_get_metadata+0x116/0x180 [ 140.635411][ T8467] __netlink_dump_start+0xcf2/0xea0 [ 140.640612][ T8467] genl_rcv_msg+0x1245/0x18a0 [ 140.645288][ T8467] ? genl_rcv_msg+0x18a0/0x18a0 [ 140.650114][ T8467] ? genl_start+0x970/0x970 [ 140.654607][ T8467] ? genl_lock_dumpit+0x150/0x150 [ 140.659613][ T8467] netlink_rcv_skb+0x6d7/0x7e0 [ 140.664354][ T8467] ? genl_rcv+0x80/0x80 [ 140.668505][ T8467] genl_rcv+0x63/0x80 [ 140.672463][ T8467] netlink_unicast+0x11c8/0x1490 [ 140.677377][ T8467] ? genl_pernet_exit+0x90/0x90 [ 140.682210][ T8467] netlink_sendmsg+0x173a/0x1840 [ 140.687134][ T8467] ____sys_sendmsg+0xc82/0x1240 [ 140.692068][ T8467] ? netlink_getsockopt+0x17e0/0x17e0 [ 140.697415][ T8467] __sys_sendmsg+0x6d1/0x840 [ 140.701994][ T8467] ? kmsan_get_metadata+0x116/0x180 [ 140.707168][ T8467] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 140.712966][ T8467] ? kmsan_get_metadata+0x116/0x180 [ 140.718148][ T8467] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 140.723932][ T8467] ? kmsan_get_metadata+0x116/0x180 [ 140.729111][ T8467] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 140.734896][ T8467] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 140.741040][ T8467] ? __prepare_exit_to_usermode+0x16c/0x560 [ 140.746941][ T8467] __se_sys_sendmsg+0x97/0xb0 [ 140.751613][ T8467] __x64_sys_sendmsg+0x4a/0x70 [ 140.756384][ T8467] do_syscall_64+0xad/0x160 [ 140.761033][ T8467] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 140.766915][ T8467] RIP: 0033:0x4402a9 [ 140.770796][ T8467] Code: Bad RIP value. [ 140.774842][ T8467] RSP: 002b:00007fffa766bf88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 140.783228][ T8467] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402a9 [ 140.791192][ T8467] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 140.799175][ T8467] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 140.807853][ T8467] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ab0 [ 140.815845][ T8467] R13: 0000000000401b40 R14: 0000000000000000 R15: 0000000000000000 [ 140.823841][ T8467] [ 140.826176][ T8467] Uninit was created at: [ 140.830442][ T8467] kmsan_internal_poison_shadow+0x66/0xd0 [ 140.836175][ T8467] kmsan_slab_alloc+0x8a/0xe0 [ 140.840879][ T8467] __kmalloc_track_caller+0xbe8/0xe10 [ 140.846255][ T8467] krealloc+0x21d/0x410 [ 140.850409][ T8467] netlink_policy_dump_start+0x111c/0x1520 [ 140.856192][ T8467] ctrl_dumppolicy+0x201/0x1610 [ 140.861032][ T8467] genl_lock_dumpit+0xdb/0x150 [ 140.865784][ T8467] netlink_dump+0xb73/0x1cb0 [ 140.870349][ T8467] __netlink_dump_start+0xcf2/0xea0 [ 140.875522][ T8467] genl_rcv_msg+0x1245/0x18a0 [ 140.880183][ T8467] netlink_rcv_skb+0x6d7/0x7e0 [ 140.884922][ T8467] genl_rcv+0x63/0x80 [ 140.888878][ T8467] netlink_unicast+0x11c8/0x1490 [ 140.893801][ T8467] netlink_sendmsg+0x173a/0x1840 [ 140.898714][ T8467] ____sys_sendmsg+0xc82/0x1240 [ 140.903538][ T8467] __sys_sendmsg+0x6d1/0x840 [ 140.908101][ T8467] __se_sys_sendmsg+0x97/0xb0 [ 140.912757][ T8467] __x64_sys_sendmsg+0x4a/0x70 [ 140.917494][ T8467] do_syscall_64+0xad/0x160 [ 140.921972][ T8467] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 140.927835][ T8467] ===================================================== [ 140.934741][ T8467] Disabling lock debugging due to kernel taint [ 140.940876][ T8467] Kernel panic - not syncing: panic_on_warn set ... [ 140.947452][ T8467] CPU: 0 PID: 8467 Comm: syz-executor169 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 140.957483][ T8467] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 140.967523][ T8467] Call Trace: [ 140.970806][ T8467] dump_stack+0x21c/0x280 [ 140.975120][ T8467] panic+0x4d7/0xef7 [ 140.979008][ T8467] ? add_taint+0x17c/0x210 [ 140.983408][ T8467] kmsan_report+0x1df/0x1e0 [ 140.987893][ T8467] __msan_warning+0x58/0xa0 [ 140.992388][ T8467] netlink_policy_dump_start+0x137d/0x1520 [ 140.998181][ T8467] ctrl_dumppolicy+0x201/0x1610 [ 141.003021][ T8467] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 141.009069][ T8467] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 141.014854][ T8467] ? ctrl_dumpfamily+0x610/0x610 [ 141.019768][ T8467] genl_lock_dumpit+0xdb/0x150 [ 141.024511][ T8467] ? genl_start+0x970/0x970 [ 141.028991][ T8467] netlink_dump+0xb73/0x1cb0 [ 141.033560][ T8467] ? kmsan_get_metadata+0x116/0x180 [ 141.038745][ T8467] __netlink_dump_start+0xcf2/0xea0 [ 141.043927][ T8467] genl_rcv_msg+0x1245/0x18a0 [ 141.048612][ T8467] ? genl_rcv_msg+0x18a0/0x18a0 [ 141.053441][ T8467] ? genl_start+0x970/0x970 [ 141.057921][ T8467] ? genl_lock_dumpit+0x150/0x150 [ 141.062963][ T8467] netlink_rcv_skb+0x6d7/0x7e0 [ 141.067718][ T8467] ? genl_rcv+0x80/0x80 [ 141.071869][ T8467] genl_rcv+0x63/0x80 [ 141.075829][ T8467] netlink_unicast+0x11c8/0x1490 [ 141.080745][ T8467] ? genl_pernet_exit+0x90/0x90 [ 141.085615][ T8467] netlink_sendmsg+0x173a/0x1840 [ 141.090543][ T8467] ____sys_sendmsg+0xc82/0x1240 [ 141.095419][ T8467] ? netlink_getsockopt+0x17e0/0x17e0 [ 141.100770][ T8467] __sys_sendmsg+0x6d1/0x840 [ 141.105354][ T8467] ? kmsan_get_metadata+0x116/0x180 [ 141.110528][ T8467] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 141.116324][ T8467] ? kmsan_get_metadata+0x116/0x180 [ 141.121518][ T8467] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 141.127298][ T8467] ? kmsan_get_metadata+0x116/0x180 [ 141.132472][ T8467] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 141.138254][ T8467] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 141.144383][ T8467] ? __prepare_exit_to_usermode+0x16c/0x560 [ 141.150253][ T8467] __se_sys_sendmsg+0x97/0xb0 [ 141.154921][ T8467] __x64_sys_sendmsg+0x4a/0x70 [ 141.159662][ T8467] do_syscall_64+0xad/0x160 [ 141.164142][ T8467] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 141.170024][ T8467] RIP: 0033:0x4402a9 [ 141.173889][ T8467] Code: Bad RIP value. [ 141.177927][ T8467] RSP: 002b:00007fffa766bf88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 141.186313][ T8467] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402a9 [ 141.194264][ T8467] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 141.202213][ T8467] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 141.210170][ T8467] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ab0 [ 141.218138][ T8467] R13: 0000000000401b40 R14: 0000000000000000 R15: 0000000000000000 [ 141.227297][ T8467] Kernel Offset: disabled [ 141.231653][ T8467] Rebooting in 86400 seconds..