Warning: Permanently added '10.128.0.191' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 79.070442][ T6851] general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN [ 79.070453][ T6851] KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f] [ 79.070466][ T6851] CPU: 1 PID: 6851 Comm: syz-executor748 Not tainted 5.7.0-rc7-next-20200529-syzkaller #0 [ 79.070473][ T6851] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.070491][ T6851] RIP: 0010:do_con_write.part.0+0x9a3/0x1dc0 [ 79.070504][ T6851] Code: 24 ae 00 00 00 45 01 ef e8 0a 02 84 fd 48 8b 44 24 60 80 38 00 0f 85 af 11 00 00 49 8b 9c 24 f0 03 00 00 48 89 d8 48 c1 e8 03 <0f> b6 14 28 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 e6 [ 79.070510][ T6851] RSP: 0018:ffffc90001717900 EFLAGS: 00010203 [ 79.070520][ T6851] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83eef946 [ 79.070526][ T6851] RDX: 0000000000000000 RSI: ffffffff83eef996 RDI: 0000000000000003 [ 79.070534][ T6851] RBP: dffffc0000000000 R08: ffff888094b4e2c0 R09: fffffbfff155b432 [ 79.070541][ T6851] R10: ffffffff8aada18f R11: fffffbfff155b431 R12: ffff8880a89e0000 [ 79.070548][ T6851] R13: 0000000000000000 R14: ffff8880a89e03dc R15: 000000000000075e [ 79.070558][ T6851] FS: 0000000000e29880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 79.070565][ T6851] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.070572][ T6851] CR2: 00000000004b4c33 CR3: 000000009e38d000 CR4: 00000000001406e0 [ 79.070582][ T6851] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.070589][ T6851] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.070593][ T6851] Call Trace: [ 79.070614][ T6851] ? do_con_trol+0x5d80/0x5d80 [ 79.070629][ T6851] ? mutex_trylock+0x2c0/0x2c0 [ 79.070643][ T6851] con_put_char+0xf0/0x100 [ 79.070655][ T6851] ? do_con_write.part.0+0x1dc0/0x1dc0 [ 79.070667][ T6851] ? n_tty_receive_buf_common+0xc2e/0x2b10 [ 79.070680][ T6851] ? mark_held_locks+0x9f/0xe0 [ 79.070693][ T6851] ? do_con_write.part.0+0x1dc0/0x1dc0 [ 79.070707][ T6851] tty_put_char+0xb7/0x150 [ 79.070720][ T6851] ? tty_hung_up_p+0x70/0x70 [ 79.070732][ T6851] ? n_tty_receive_signal_char+0xc5/0x110 [ 79.070745][ T6851] ? con_write_room+0x59/0x70 [ 79.070757][ T6851] __process_echoes+0x56d/0xa00 [ 79.070772][ T6851] n_tty_receive_buf_common+0xc65/0x2b10 [ 79.070792][ T6851] ? n_tty_receive_buf2+0x40/0x40 [ 79.070805][ T6851] tty_ioctl+0x905/0x1440 [ 79.070819][ T6851] ? tty_vhangup+0x30/0x30 [ 79.070833][ T6851] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 79.070870][ T6851] ? do_vfs_ioctl+0x27d/0x1090 [ 79.070885][ T6851] ? ioctl_file_clone+0x180/0x180 [ 79.070902][ T6851] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 79.070915][ T6851] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 79.070926][ T6851] ? prepare_exit_to_usermode+0xa/0x30 [ 79.070939][ T6851] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 79.070951][ T6851] ? check_preemption_disabled+0x38/0x220 [ 79.070963][ T6851] ? check_preemption_disabled+0x38/0x220 [ 79.070980][ T6851] ? tty_vhangup+0x30/0x30 [ 79.070993][ T6851] ksys_ioctl+0x11a/0x180 [ 79.071007][ T6851] __x64_sys_ioctl+0x6f/0xb0 [ 79.071018][ T6851] do_syscall_64+0x60/0xe0 [ 79.071031][ T6851] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 79.071040][ T6851] RIP: 0033:0x441459 [ 79.071051][ T6851] Code: e8 3c ad 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 79.071057][ T6851] RSP: 002b:00007ffd87315298 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 79.071068][ T6851] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441459 [ 79.071075][ T6851] RDX: 00000000200000c0 RSI: 0000000000005412 RDI: 0000000000000004 [ 79.071082][ T6851] RBP: 00000000006cc018 R08: 000000000000000e R09: 00000000004002c8 [ 79.071088][ T6851] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402280 [ 79.071095][ T6851] R13: 0000000000402310 R14: 0000000000000000 R15: 0000000000000000 [ 79.071105][ T6851] Modules linked in: [ 79.071121][ T6851] ---[ end trace e383be3934094729 ]--- [ 79.071139][ T6851] RIP: 0010:do_con_write.part.0+0x9a3/0x1dc0 [ 79.071150][ T6851] Code: 24 ae 00 00 00 45 01 ef e8 0a 02 84 fd 48 8b 44 24 60 80 38 00 0f 85 af 11 00 00 49 8b 9c 24 f0 03 00 00 48 89 d8 48 c1 e8 03 <0f> b6 14 28 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 e6 [ 79.071162][ T6851] RSP: 0018:ffffc90001717900 EFLAGS: 00010203 [ 79.071172][ T6851] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83eef946 [ 79.071178][ T6851] RDX: 0000000000000000 RSI: ffffffff83eef996 RDI: 0000000000000003 [ 79.071186][ T6851] RBP: dffffc0000000000 R08: ffff888094b4e2c0 R09: fffffbfff155b432 [ 79.071194][ T6851] R10: ffffffff8aada18f R11: fffffbfff155b431 R12: ffff8880a89e0000 [ 79.071201][ T6851] R13: 0000000000000000 R14: ffff8880a89e03dc R15: 000000000000075e [ 79.071210][ T6851] FS: 0000000000e29880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 79.071218][ T6851] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.071225][ T6851] CR2: 00000000004b4c33 CR3: 000000009e38d000 CR4: 00000000001406e0 [ 79.071234][ T6851] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.071241][ T6851] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.071247][ T6851] Kernel panic - not syncing: Fatal exception [ 79.072675][ T6851] Kernel Offset: disabled [ 79.588794][ T6851] Rebooting in 86400 seconds..