[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.052871] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.771907] random: sshd: uninitialized urandom read (32 bytes read) [ 35.064892] random: sshd: uninitialized urandom read (32 bytes read) [ 36.417829] random: sshd: uninitialized urandom read (32 bytes read) [ 36.645858] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.201' (ECDSA) to the list of known hosts. [ 42.249835] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 42.369977] ================================================================== [ 42.377426] BUG: KMSAN: uninit-value in unix_find_other+0x315/0xc60 [ 42.383864] CPU: 1 PID: 4574 Comm: syz-executor354 Not tainted 4.17.0+ #22 [ 42.390883] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.400273] Call Trace: [ 42.402865] dump_stack+0x185/0x1d0 [ 42.406489] kmsan_report+0x188/0x2a0 [ 42.410291] __msan_warning_32+0x70/0xc0 [ 42.414347] ? _raw_spin_lock+0x13/0x80 [ 42.418328] unix_find_other+0x315/0xc60 [ 42.422383] unix_stream_connect+0x84e/0x26b0 [ 42.426883] ? unix_bind+0x1a10/0x1a10 [ 42.430763] p9_fd_create_unix+0x36b/0x5f0 [ 42.434993] ? kmsan_set_origin+0x9e/0x160 [ 42.439223] ? p9_pollwake+0x380/0x380 [ 42.443100] p9_client_create+0x1333/0x20e0 [ 42.447421] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 42.452875] v9fs_session_init+0x313/0x2830 [ 42.457188] ? kmsan_internal_unpoison_shadow+0x83/0xe0 [ 42.462546] ? __kmalloc+0x13a/0x350 [ 42.466249] ? v9fs_mount+0x96/0x11b0 [ 42.470051] v9fs_mount+0x107/0x11b0 [ 42.473770] ? alloc_pages_current+0x6b1/0x970 [ 42.478347] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 42.483704] ? xfs_fs_commit_blocks+0xcc0/0xcc0 [ 42.488360] mount_fs+0x29b/0x780 [ 42.491811] vfs_kern_mount+0x222/0x990 [ 42.495777] do_mount+0xca5/0x4ed0 [ 42.499316] ? __kmalloc+0x13a/0x350 [ 42.503035] ? copy_mount_options+0x91/0x540 [ 42.507457] ksys_mount+0x32e/0x3d0 [ 42.511093] __x64_sys_mount+0x157/0x1c0 [ 42.515148] ? ksys_mount+0x3d0/0x3d0 [ 42.519119] do_syscall_64+0x15b/0x230 [ 42.523009] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 42.528211] RIP: 0033:0x4400d9 [ 42.531399] RSP: 002b:00007fff30dec578 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 42.539098] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004400d9 [ 42.546369] RDX: 00000000200000c0 RSI: 0000000020000040 RDI: 0000000020000000 [ 42.553629] RBP: 00000000006ca018 R08: 0000000020000100 R09: 00000000004002c8 [ 42.560899] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401960 [ 42.568166] R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000 [ 42.575449] [ 42.577072] Local variable description: ----sun_server@p9_fd_create_unix [ 42.583894] Variable was created at: [ 42.587617] p9_fd_create_unix+0x7a/0x5f0 [ 42.591756] p9_client_create+0x1333/0x20e0 [ 42.596064] ================================================================== [ 42.603414] Disabling lock debugging due to kernel taint [ 42.608856] Kernel panic - not syncing: panic_on_warn set ... [ 42.608856] [ 42.616213] CPU: 1 PID: 4574 Comm: syz-executor354 Tainted: G B 4.17.0+ #22 [ 42.624610] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.633962] Call Trace: [ 42.636546] dump_stack+0x185/0x1d0 [ 42.640163] panic+0x3d0/0x9b0 [ 42.643358] kmsan_report+0x29e/0x2a0 [ 42.647160] __msan_warning_32+0x70/0xc0 [ 42.651225] ? _raw_spin_lock+0x13/0x80 [ 42.655193] unix_find_other+0x315/0xc60 [ 42.659262] unix_stream_connect+0x84e/0x26b0 [ 42.663769] ? unix_bind+0x1a10/0x1a10 [ 42.667642] p9_fd_create_unix+0x36b/0x5f0 [ 42.671868] ? kmsan_set_origin+0x9e/0x160 [ 42.676097] ? p9_pollwake+0x380/0x380 [ 42.679975] p9_client_create+0x1333/0x20e0 [ 42.684311] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 42.689758] v9fs_session_init+0x313/0x2830 [ 42.694104] ? kmsan_internal_unpoison_shadow+0x83/0xe0 [ 42.699475] ? __kmalloc+0x13a/0x350 [ 42.703179] ? v9fs_mount+0x96/0x11b0 [ 42.706981] v9fs_mount+0x107/0x11b0 [ 42.710695] ? alloc_pages_current+0x6b1/0x970 [ 42.715267] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 42.720624] ? xfs_fs_commit_blocks+0xcc0/0xcc0 [ 42.725299] mount_fs+0x29b/0x780 [ 42.728761] vfs_kern_mount+0x222/0x990 [ 42.732727] do_mount+0xca5/0x4ed0 [ 42.736291] ? __kmalloc+0x13a/0x350 [ 42.739995] ? copy_mount_options+0x91/0x540 [ 42.744411] ksys_mount+0x32e/0x3d0 [ 42.748049] __x64_sys_mount+0x157/0x1c0 [ 42.752106] ? ksys_mount+0x3d0/0x3d0 [ 42.755895] do_syscall_64+0x15b/0x230 [ 42.759779] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 42.764977] RIP: 0033:0x4400d9 [ 42.768161] RSP: 002b:00007fff30dec578 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 42.775861] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004400d9 [ 42.783123] RDX: 00000000200000c0 RSI: 0000000020000040 RDI: 0000000020000000 [ 42.790392] RBP: 00000000006ca018 R08: 0000000020000100 R09: 00000000004002c8 [ 42.797656] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401960 [ 42.804920] R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000 [ 42.812874] Dumping ftrace buffer: [ 42.816433] (ftrace buffer empty) [ 42.820345] Kernel Offset: disabled [ 42.823977] Rebooting in 86400 seconds..