[ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Started System Logging Service. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ 80.726509][ T8489] sshd (8489) used greatest stack depth: 4224 bytes left Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.195' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 102.290150][ T32] audit: type=1400 audit(1594971333.258:8): avc: denied { execmem } for pid=8807 comm="syz-executor438" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 102.298073][ T8807] ===================================================== [ 102.317746][ T8807] BUG: KMSAN: uninit-value in __fget_light+0x607/0x700 [ 102.324593][ T8807] CPU: 0 PID: 8807 Comm: syz-executor438 Not tainted 5.7.0-rc4-syzkaller #0 [ 102.333237][ T8807] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.343299][ T8807] Call Trace: [ 102.346573][ T8807] dump_stack+0x1c9/0x220 [ 102.350887][ T8807] kmsan_report+0xf7/0x1e0 [ 102.355290][ T8807] __msan_warning+0x58/0xa0 [ 102.359776][ T8807] __fget_light+0x607/0x700 [ 102.364300][ T8807] ? __kmalloc+0x115/0x460 [ 102.368702][ T8807] __fdget+0x4e/0x60 [ 102.372584][ T8807] bpf_map_get+0x47/0x2b0 [ 102.376905][ T8807] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 102.382697][ T8807] bpf_sk_storage_diag_alloc+0x49e/0xb40 [ 102.388336][ T8807] __inet_diag_dump_start+0x68c/0x1190 [ 102.393811][ T8807] inet_diag_dump_start_compat+0x4d/0x60 [ 102.399419][ T8807] ? __inet_diag_dump+0x510/0x510 [ 102.404428][ T8807] __netlink_dump_start+0x633/0xd00 [ 102.409634][ T8807] inet_diag_rcv_msg_compat+0x5c1/0x940 [ 102.415172][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 102.420351][ T8807] ? __inet_diag_dump+0x510/0x510 [ 102.425356][ T8807] ? inet_diag_dump_start_compat+0x60/0x60 [ 102.431140][ T8807] ? inet_diag_dump+0xc0/0xc0 [ 102.435803][ T8807] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 102.441852][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 102.447033][ T8807] ? inet_diag_unregister+0x110/0x110 [ 102.452398][ T8807] sock_diag_rcv_msg+0x211/0x610 [ 102.457342][ T8807] netlink_rcv_skb+0x451/0x650 [ 102.462092][ T8807] ? sock_diag_bind+0x170/0x170 [ 102.466933][ T8807] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 102.472993][ T8807] sock_diag_rcv+0x63/0x80 [ 102.477392][ T8807] netlink_unicast+0xf9e/0x1100 [ 102.482228][ T8807] ? diag_net_exit+0x90/0x90 [ 102.486809][ T8807] netlink_sendmsg+0x1246/0x14d0 [ 102.491747][ T8807] ? netlink_getsockopt+0x1440/0x1440 [ 102.497102][ T8807] ____sys_sendmsg+0x12b6/0x1350 [ 102.502046][ T8807] __sys_sendmsg+0x623/0x750 [ 102.506619][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 102.511811][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 102.517012][ T8807] ? kmsan_set_origin_checked+0x95/0xf0 [ 102.522543][ T8807] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 102.528595][ T8807] ? up_read+0x40/0x2b0 [ 102.532731][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 102.537907][ T8807] ? kmsan_get_metadata+0x4f/0x180 [ 102.543013][ T8807] ? kmsan_get_metadata+0x4f/0x180 [ 102.548111][ T8807] __se_compat_sys_sendmsg+0xa7/0xc0 [ 102.553387][ T8807] __ia32_compat_sys_sendmsg+0x4a/0x70 [ 102.558826][ T8807] ? compat_mc_getsockopt+0x15a0/0x15a0 [ 102.564353][ T8807] do_fast_syscall_32+0x3bf/0x6d0 [ 102.569369][ T8807] entry_SYSENTER_compat+0x68/0x77 [ 102.574455][ T8807] RIP: 0023:0xf7f4fdd9 [ 102.578513][ T8807] Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 102.598107][ T8807] RSP: 002b:00000000ffd6d5cc EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 102.606502][ T8807] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000000 [ 102.614458][ T8807] RDX: 0000000000000000 RSI: 00000000080ea078 RDI: 00000000ffd6d620 [ 102.622413][ T8807] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 102.630373][ T8807] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 102.638324][ T8807] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 102.646318][ T8807] [ 102.648623][ T8807] Uninit was created at: [ 102.652882][ T8807] kmsan_internal_poison_shadow+0x66/0xd0 [ 102.658582][ T8807] kmsan_slab_alloc+0x8a/0xe0 [ 102.663241][ T8807] __kmalloc_node_track_caller+0xb40/0x1200 [ 102.669149][ T8807] __alloc_skb+0x2fd/0xac0 [ 102.673551][ T8807] netlink_sendmsg+0x7d3/0x14d0 [ 102.678383][ T8807] ____sys_sendmsg+0x12b6/0x1350 [ 102.683301][ T8807] __sys_sendmsg+0x623/0x750 [ 102.687906][ T8807] __se_compat_sys_sendmsg+0xa7/0xc0 [ 102.693170][ T8807] __ia32_compat_sys_sendmsg+0x4a/0x70 [ 102.698871][ T8807] do_fast_syscall_32+0x3bf/0x6d0 [ 102.703882][ T8807] entry_SYSENTER_compat+0x68/0x77 [ 102.708963][ T8807] ===================================================== [ 102.715870][ T8807] Disabling lock debugging due to kernel taint [ 102.721999][ T8807] Kernel panic - not syncing: panic_on_warn set ... [ 102.728577][ T8807] CPU: 0 PID: 8807 Comm: syz-executor438 Tainted: G B 5.7.0-rc4-syzkaller #0 [ 102.738702][ T8807] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.748747][ T8807] Call Trace: [ 102.752027][ T8807] dump_stack+0x1c9/0x220 [ 102.756348][ T8807] panic+0x3d5/0xc3e [ 102.760445][ T8807] kmsan_report+0x1df/0x1e0 [ 102.764937][ T8807] __msan_warning+0x58/0xa0 [ 102.769427][ T8807] __fget_light+0x607/0x700 [ 102.773918][ T8807] ? __kmalloc+0x115/0x460 [ 102.778316][ T8807] __fdget+0x4e/0x60 [ 102.782193][ T8807] bpf_map_get+0x47/0x2b0 [ 102.786530][ T8807] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 102.792346][ T8807] bpf_sk_storage_diag_alloc+0x49e/0xb40 [ 102.797992][ T8807] __inet_diag_dump_start+0x68c/0x1190 [ 102.803459][ T8807] inet_diag_dump_start_compat+0x4d/0x60 [ 102.809190][ T8807] ? __inet_diag_dump+0x510/0x510 [ 102.814286][ T8807] __netlink_dump_start+0x633/0xd00 [ 102.819480][ T8807] inet_diag_rcv_msg_compat+0x5c1/0x940 [ 102.825014][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 102.830192][ T8807] ? __inet_diag_dump+0x510/0x510 [ 102.835195][ T8807] ? inet_diag_dump_start_compat+0x60/0x60 [ 102.840978][ T8807] ? inet_diag_dump+0xc0/0xc0 [ 102.845641][ T8807] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 102.851690][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 102.856874][ T8807] ? inet_diag_unregister+0x110/0x110 [ 102.862233][ T8807] sock_diag_rcv_msg+0x211/0x610 [ 102.867171][ T8807] netlink_rcv_skb+0x451/0x650 [ 102.871918][ T8807] ? sock_diag_bind+0x170/0x170 [ 102.876763][ T8807] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 102.882828][ T8807] sock_diag_rcv+0x63/0x80 [ 102.887228][ T8807] netlink_unicast+0xf9e/0x1100 [ 102.892075][ T8807] ? diag_net_exit+0x90/0x90 [ 102.896657][ T8807] netlink_sendmsg+0x1246/0x14d0 [ 102.901598][ T8807] ? netlink_getsockopt+0x1440/0x1440 [ 102.906964][ T8807] ____sys_sendmsg+0x12b6/0x1350 [ 102.911914][ T8807] __sys_sendmsg+0x623/0x750 [ 102.916484][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 102.921678][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 102.926858][ T8807] ? kmsan_set_origin_checked+0x95/0xf0 [ 102.932383][ T8807] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 102.938439][ T8807] ? up_read+0x40/0x2b0 [ 102.942579][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 102.948055][ T8807] ? kmsan_get_metadata+0x4f/0x180 [ 102.953163][ T8807] ? kmsan_get_metadata+0x4f/0x180 [ 102.958262][ T8807] __se_compat_sys_sendmsg+0xa7/0xc0 [ 102.963538][ T8807] __ia32_compat_sys_sendmsg+0x4a/0x70 [ 102.968985][ T8807] ? compat_mc_getsockopt+0x15a0/0x15a0 [ 102.974523][ T8807] do_fast_syscall_32+0x3bf/0x6d0 [ 102.979538][ T8807] entry_SYSENTER_compat+0x68/0x77 [ 102.984628][ T8807] RIP: 0023:0xf7f4fdd9 [ 102.988674][ T8807] Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 103.008267][ T8807] RSP: 002b:00000000ffd6d5cc EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 103.016668][ T8807] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000000 [ 103.024633][ T8807] RDX: 0000000000000000 RSI: 00000000080ea078 RDI: 00000000ffd6d620 [ 103.032594][ T8807] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 103.040545][ T8807] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 103.048505][ T8807] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 103.056920][ T8807] ------------[ cut here ]------------ [ 103.062368][ T8807] kernel BUG at mm/kmsan/kmsan.h:87! [ 103.067637][ T8807] invalid opcode: 0000 [#1] SMP [ 103.072465][ T8807] CPU: 0 PID: 8807 Comm: syz-executor438 Tainted: G B 5.7.0-rc4-syzkaller #0 [ 103.082493][ T8807] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.092538][ T8807] RIP: 0010:kmsan_internal_check_memory+0x3c0/0x3d0 [ 103.099124][ T8807] Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 48 c7 c7 91 3b c9 a3 31 c0 e8 61 7f 47 ff 0f 0b 0f 0b 0f 0b 0f 0b e8 82 9d 47 ff 0f 0b <0f> 0b 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 83 ff [ 103.118710][ T8807] RSP: 0018:ffffa95140db6ec8 EFLAGS: 00010046 [ 103.124770][ T8807] RAX: 0000000000000002 RBX: 0000000006ae00b5 RCX: 0000000006ae00b5 [ 103.132731][ T8807] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffa95140db6fa4 [ 103.140684][ T8807] RBP: ffffa95140db6f70 R08: 0000000000000000 R09: ffff92396fc28ed0 [ 103.148637][ T8807] R10: 0000000000000000 R11: ffffffff9a958ae0 R12: 0000000000000000 [ 103.156590][ T8807] R13: 0000000000000001 R14: 0000000000000002 R15: 0000000000000001 [ 103.164555][ T8807] FS: 0000000000000000(0000) GS:ffff92396fc00000(0063) knlGS:0000000008452840 [ 103.173461][ T8807] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 103.180030][ T8807] CR2: 00000000200002e6 CR3: 000000010bc5f000 CR4: 00000000001406f0 [ 103.187981][ T8807] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.195928][ T8807] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.204576][ T8807] Call Trace: [ 103.207867][ T8807] kmsan_check_memory+0xd/0x10 [ 103.212702][ T8807] iowrite8+0x99/0x2e0 [ 103.216759][ T8807] pvpanic_panic_notify+0x99/0xc0 [ 103.221762][ T8807] ? pvpanic_mmio_remove+0x60/0x60 [ 103.226875][ T8807] atomic_notifier_call_chain+0x12a/0x240 [ 103.232582][ T8807] panic+0x468/0xc3e [ 103.236521][ T8807] kmsan_report+0x1df/0x1e0 [ 103.241038][ T8807] __msan_warning+0x58/0xa0 [ 103.245527][ T8807] __fget_light+0x607/0x700 [ 103.250048][ T8807] ? __kmalloc+0x115/0x460 [ 103.254447][ T8807] __fdget+0x4e/0x60 [ 103.258345][ T8807] bpf_map_get+0x47/0x2b0 [ 103.271856][ T8807] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 103.277645][ T8807] bpf_sk_storage_diag_alloc+0x49e/0xb40 [ 103.283273][ T8807] __inet_diag_dump_start+0x68c/0x1190 [ 103.288735][ T8807] inet_diag_dump_start_compat+0x4d/0x60 [ 103.294345][ T8807] ? __inet_diag_dump+0x510/0x510 [ 103.299352][ T8807] __netlink_dump_start+0x633/0xd00 [ 103.304542][ T8807] inet_diag_rcv_msg_compat+0x5c1/0x940 [ 103.310074][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 103.315261][ T8807] ? __inet_diag_dump+0x510/0x510 [ 103.320265][ T8807] ? inet_diag_dump_start_compat+0x60/0x60 [ 103.326060][ T8807] ? inet_diag_dump+0xc0/0xc0 [ 103.330719][ T8807] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 103.336777][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 103.341954][ T8807] ? inet_diag_unregister+0x110/0x110 [ 103.347308][ T8807] sock_diag_rcv_msg+0x211/0x610 [ 103.352242][ T8807] netlink_rcv_skb+0x451/0x650 [ 103.357000][ T8807] ? sock_diag_bind+0x170/0x170 [ 103.361829][ T8807] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 103.367884][ T8807] sock_diag_rcv+0x63/0x80 [ 103.372297][ T8807] netlink_unicast+0xf9e/0x1100 [ 103.377150][ T8807] ? diag_net_exit+0x90/0x90 [ 103.381729][ T8807] netlink_sendmsg+0x1246/0x14d0 [ 103.386668][ T8807] ? netlink_getsockopt+0x1440/0x1440 [ 103.392017][ T8807] ____sys_sendmsg+0x12b6/0x1350 [ 103.396949][ T8807] __sys_sendmsg+0x623/0x750 [ 103.401529][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 103.406733][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 103.411924][ T8807] ? kmsan_set_origin_checked+0x95/0xf0 [ 103.417451][ T8807] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 103.423499][ T8807] ? up_read+0x40/0x2b0 [ 103.427647][ T8807] ? kmsan_get_metadata+0x11d/0x180 [ 103.432834][ T8807] ? kmsan_get_metadata+0x4f/0x180 [ 103.437943][ T8807] ? kmsan_get_metadata+0x4f/0x180 [ 103.443043][ T8807] __se_compat_sys_sendmsg+0xa7/0xc0 [ 103.448329][ T8807] __ia32_compat_sys_sendmsg+0x4a/0x70 [ 103.453771][ T8807] ? compat_mc_getsockopt+0x15a0/0x15a0 [ 103.459308][ T8807] do_fast_syscall_32+0x3bf/0x6d0 [ 103.464346][ T8807] entry_SYSENTER_compat+0x68/0x77 [ 103.469450][ T8807] RIP: 0023:0xf7f4fdd9 [ 103.473515][ T8807] Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 103.493112][ T8807] RSP: 002b:00000000ffd6d5cc EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 103.501515][ T8807] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000000 [ 103.509463][ T8807] RDX: 0000000000000000 RSI: 00000000080ea078 RDI: 00000000ffd6d620 [ 103.517412][ T8807] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 103.525358][ T8807] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 103.533319][ T8807] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 103.541284][ T8807] Modules linked in: [ 103.545165][ T8807] ---[ end trace 5f18e1d0d14d951a ]--- [ 103.550605][ T8807] RIP: 0010:kmsan_internal_check_memory+0x3c0/0x3d0 [ 103.557181][ T8807] Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 48 c7 c7 91 3b c9 a3 31 c0 e8 61 7f 47 ff 0f 0b 0f 0b 0f 0b 0f 0b e8 82 9d 47 ff 0f 0b <0f> 0b 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 83 ff [ 103.576773][ T8807] RSP: 0018:ffffa95140db6ec8 EFLAGS: 00010046 [ 103.582826][ T8807] RAX: 0000000000000002 RBX: 0000000006ae00b5 RCX: 0000000006ae00b5 [ 103.590775][ T8807] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffa95140db6fa4 [ 103.598722][ T8807] RBP: ffffa95140db6f70 R08: 0000000000000000 R09: ffff92396fc28ed0 [ 103.606677][ T8807] R10: 0000000000000000 R11: ffffffff9a958ae0 R12: 0000000000000000 [ 103.614640][ T8807] R13: 0000000000000001 R14: 0000000000000002 R15: 0000000000000001 [ 103.622596][ T8807] FS: 0000000000000000(0000) GS:ffff92396fc00000(0063) knlGS:0000000008452840 [ 103.631520][ T8807] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 103.638083][ T8807] CR2: 00000000200002e6 CR3: 000000010bc5f000 CR4: 00000000001406f0 [ 103.646032][ T8807] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.653983][ T8807] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.661937][ T8807] Kernel panic - not syncing: Fatal exception [ 103.668576][ T8807] Kernel Offset: 0x14600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 103.680217][ T8807] Rebooting in 86400 seconds..