[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.249291] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.858765] random: sshd: uninitialized urandom read (32 bytes read) [ 24.427512] random: sshd: uninitialized urandom read (32 bytes read) [ 25.223847] random: sshd: uninitialized urandom read (32 bytes read) [ 27.496547] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts. [ 32.917894] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 33.011504] tls_set_device_offload: netdev not found [ 33.026759] WARNING: CPU: 0 PID: 4534 at lib/iov_iter.c:918 iov_iter_revert+0x2ee/0xaa0 [ 33.035011] Kernel panic - not syncing: panic_on_warn set ... [ 33.035011] [ 33.042371] CPU: 0 PID: 4534 Comm: syz-executor979 Not tainted 4.17.0+ #94 [ 33.049475] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.058955] Call Trace: [ 33.061536] dump_stack+0x1b9/0x294 [ 33.065198] ? dump_stack_print_info.cold.2+0x52/0x52 [ 33.070374] ? iov_iter_revert+0x240/0xaa0 [ 33.074595] panic+0x22f/0x4de [ 33.077770] ? add_taint.cold.5+0x16/0x16 [ 33.081936] ? __warn.cold.8+0x148/0x1b3 [ 33.085994] ? __warn.cold.8+0x117/0x1b3 [ 33.090053] ? iov_iter_revert+0x2ee/0xaa0 [ 33.094275] __warn.cold.8+0x163/0x1b3 [ 33.098148] ? iov_iter_revert+0x2ee/0xaa0 [ 33.102371] report_bug+0x252/0x2d0 [ 33.106003] do_error_trap+0x1fc/0x4d0 [ 33.109895] ? math_error+0x3f0/0x3f0 [ 33.113702] ? sock_def_error_report+0x2f2/0x710 [ 33.118443] ? sock_def_readable+0x710/0x710 [ 33.122838] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.127668] do_invalid_op+0x1b/0x20 [ 33.131366] invalid_op+0x14/0x20 [ 33.134805] RIP: 0010:iov_iter_revert+0x2ee/0xaa0 [ 33.139628] Code: 74 24 08 4d 89 7d 20 48 89 de 49 83 c7 01 4c 89 f7 e8 76 50 24 fe 49 39 de 72 b7 e8 bc 4f 24 fe e9 3b ff ff ff e8 b2 4f 24 fe <0f> 0b e9 3a ff ff ff e8 a6 4f 24 fe 49 8d 7d 18 48 b8 00 00 00 00 [ 33.158987] RSP: 0018:ffff8801aff4f788 EFLAGS: 00010293 [ 33.164356] RAX: ffff8801af8263c0 RBX: 00000000fffffeed RCX: ffffffff8355eb01 [ 33.171621] RDX: 0000000000000000 RSI: ffffffff8355edae RDI: 0000000000000007 [ 33.178920] RBP: ffff8801aff4f7e8 R08: ffff8801af8263c0 R09: ffffed003b5c46d6 [ 33.186181] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000113 [ 33.193440] R13: ffff8801aff4fad0 R14: 0000000000000478 R15: ffff8801b2890040 [ 33.200840] ? iov_iter_revert+0x41/0xaa0 [ 33.204992] ? iov_iter_revert+0x2ee/0xaa0 [ 33.209333] ? iov_iter_revert+0x2ee/0xaa0 [ 33.213567] tls_sw_sendmsg+0xefc/0x12b0 [ 33.217613] ? generic_pipe_buf_nosteal+0x10/0x10 [ 33.222446] ? tls_sw_push_pending_record+0x30/0x30 [ 33.227451] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 33.232543] ? __atime_needs_update+0x453/0xd10 [ 33.237206] ? debug_check_no_locks_freed+0x310/0x310 [ 33.242406] inet_sendmsg+0x19f/0x690 [ 33.246193] ? ipip_gro_receive+0x100/0x100 [ 33.250500] ? __atime_needs_update+0xd10/0xd10 [ 33.255172] ? do_splice_direct+0x400/0x400 [ 33.259496] ? security_socket_sendmsg+0x94/0xc0 [ 33.264238] ? ipip_gro_receive+0x100/0x100 [ 33.268545] sock_sendmsg+0xd5/0x120 [ 33.272243] sock_write_iter+0x35a/0x5a0 [ 33.276410] ? sock_sendmsg+0x120/0x120 [ 33.280376] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 33.285901] ? iov_iter_init+0xc9/0x1f0 [ 33.289863] __vfs_write+0x6ae/0x9d0 [ 33.293574] ? kernel_read+0x120/0x120 [ 33.297454] ? lock_downgrade+0x8e0/0x8e0 [ 33.301589] ? rw_verify_area+0x118/0x360 [ 33.305725] vfs_write+0x1f8/0x560 [ 33.309252] ksys_write+0xf9/0x250 [ 33.312862] ? __ia32_sys_read+0xb0/0xb0 [ 33.316906] ? __ia32_sys_sendfile+0x290/0x290 [ 33.321478] __x64_sys_write+0x73/0xb0 [ 33.325367] do_syscall_64+0x1b1/0x800 [ 33.329264] ? syscall_return_slowpath+0x5c0/0x5c0 [ 33.334190] ? syscall_return_slowpath+0x30f/0x5c0 [ 33.339110] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 33.344464] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.349296] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.354482] RIP: 0033:0x440a69 [ 33.359345] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 33.378525] RSP: 002b:00007fff3d7337b8 EFLAGS: 00000207 ORIG_RAX: 0000000000000001 [ 33.386227] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440a69 [ 33.393485] RDX: 0000000000000478 RSI: 0000000020000740 RDI: 0000000000000003 [ 33.400743] RBP: 00000000006cb018 R08: 65732f636f72702f R09: 65732f636f72702f [ 33.408021] R10: 000000000000000f R11: 0000000000000207 R12: 00000000004022f0 [ 33.415289] R13: 0000000000402380 R14: 0000000000000000 R15: 0000000000000000 [ 33.423531] Dumping ftrace buffer: [ 33.427226] (ftrace buffer empty) [ 33.430920] Kernel Offset: disabled [ 33.434534] Rebooting in 86400 seconds..