[ OK ] Started Getty on tty1. [ OK ] Started System Logging Service. [ OK ] Found device /dev/ttyS0. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 91.236183][ T8771] sshd (8771) used greatest stack depth: 4768 bytes left Warning: Permanently added '10.128.0.100' (ECDSA) to the list of known hosts. executing program [ 104.012948][ T32] audit: type=1400 audit(1594141576.073:8): avc: denied { execmem } for pid=8815 comm="syz-executor333" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 104.020529][ T8815] ===================================================== [ 104.040521][ T8815] BUG: KMSAN: uninit-value in path_openat+0x48be/0x5d50 [ 104.047461][ T8815] CPU: 1 PID: 8815 Comm: syz-executor333 Not tainted 5.7.0-rc4-syzkaller #0 [ 104.056121][ T8815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 104.066162][ T8815] Call Trace: [ 104.069445][ T8815] dump_stack+0x1c9/0x220 [ 104.073763][ T8815] kmsan_report+0xf7/0x1e0 [ 104.078167][ T8815] __msan_warning+0x58/0xa0 [ 104.082659][ T8815] path_openat+0x48be/0x5d50 [ 104.087425][ T8815] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 104.093482][ T8815] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 104.099546][ T8815] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 104.105683][ T8815] ? kmsan_get_metadata+0x11d/0x180 [ 104.110879][ T8815] ? kmsan_get_metadata+0x11d/0x180 [ 104.116068][ T8815] do_file_open_root+0x469/0xb40 [ 104.121013][ T8815] ? __msan_poison_alloca+0xf0/0x120 [ 104.126289][ T8815] ? kmsan_get_metadata+0x4f/0x180 [ 104.131388][ T8815] file_open_root+0x6f1/0x760 [ 104.136070][ T8815] do_handle_open+0xa11/0xe30 [ 104.140743][ T8815] __se_compat_sys_open_by_handle_at+0x8e/0xa0 [ 104.146886][ T8815] __ia32_compat_sys_open_by_handle_at+0x4a/0x70 [ 104.153195][ T8815] ? __ia32_sys_open_by_handle_at+0x70/0x70 [ 104.159164][ T8815] do_fast_syscall_32+0x3bf/0x6d0 [ 104.164182][ T8815] entry_SYSENTER_compat+0x68/0x77 [ 104.169289][ T8815] RIP: 0023:0xf7f3bdd9 [ 104.173349][ T8815] 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 [ 104.192945][ T8815] RSP: 002b:00000000ff8507fc EFLAGS: 00000207 ORIG_RAX: 0000000000000156 [ 104.201338][ T8815] RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000200 [ 104.209300][ T8815] RDX: 0000000000002f40 RSI: 0000000000000001 RDI: 00000000080bb4c8 [ 104.217256][ T8815] RBP: 0000000000000012 R08: 0000000000000000 R09: 0000000000000000 [ 104.225206][ T8815] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 104.233172][ T8815] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 104.241135][ T8815] [ 104.243444][ T8815] Local variable ----nd@do_file_open_root created at: [ 104.250233][ T8815] do_file_open_root+0xa4/0xb40 [ 104.255070][ T8815] do_file_open_root+0xa4/0xb40 [ 104.259894][ T8815] ===================================================== [ 104.266802][ T8815] Disabling lock debugging due to kernel taint [ 104.272932][ T8815] Kernel panic - not syncing: panic_on_warn set ... [ 104.279519][ T8815] CPU: 1 PID: 8815 Comm: syz-executor333 Tainted: G B 5.7.0-rc4-syzkaller #0 [ 104.289555][ T8815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 104.299601][ T8815] Call Trace: [ 104.302891][ T8815] dump_stack+0x1c9/0x220 [ 104.307245][ T8815] panic+0x3d5/0xc3e [ 104.311146][ T8815] kmsan_report+0x1df/0x1e0 [ 104.315637][ T8815] __msan_warning+0x58/0xa0 [ 104.320126][ T8815] path_openat+0x48be/0x5d50 [ 104.324702][ T8815] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 104.330761][ T8815] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 104.336822][ T8815] ? kmsan_memcpy_memmove_metadata+0x10c/0x2e0 [ 104.342983][ T8815] ? kmsan_get_metadata+0x11d/0x180 [ 104.348170][ T8815] ? kmsan_get_metadata+0x11d/0x180 [ 104.353367][ T8815] do_file_open_root+0x469/0xb40 [ 104.358305][ T8815] ? __msan_poison_alloca+0xf0/0x120 [ 104.363578][ T8815] ? kmsan_get_metadata+0x4f/0x180 [ 104.368695][ T8815] file_open_root+0x6f1/0x760 [ 104.373394][ T8815] do_handle_open+0xa11/0xe30 [ 104.378070][ T8815] __se_compat_sys_open_by_handle_at+0x8e/0xa0 [ 104.384214][ T8815] __ia32_compat_sys_open_by_handle_at+0x4a/0x70 [ 104.390524][ T8815] ? __ia32_sys_open_by_handle_at+0x70/0x70 [ 104.396405][ T8815] do_fast_syscall_32+0x3bf/0x6d0 [ 104.401424][ T8815] entry_SYSENTER_compat+0x68/0x77 [ 104.406515][ T8815] RIP: 0023:0xf7f3bdd9 [ 104.410564][ T8815] 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 [ 104.430171][ T8815] RSP: 002b:00000000ff8507fc EFLAGS: 00000207 ORIG_RAX: 0000000000000156 [ 104.438571][ T8815] RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000200 [ 104.446531][ T8815] RDX: 0000000000002f40 RSI: 0000000000000001 RDI: 00000000080bb4c8 [ 104.454495][ T8815] RBP: 0000000000000012 R08: 0000000000000000 R09: 0000000000000000 [ 104.462458][ T8815] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 104.470422][ T8815] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 104.479345][ T8815] Kernel Offset: 0xba00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 104.490885][ T8815] Rebooting in 86400 seconds..