Warning: Permanently added '10.128.1.30' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.600413] audit: type=1400 audit(1593809794.373:8): avc: denied { execmem } for pid=6425 comm="syz-executor754" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 39.679071] kasan: CONFIG_KASAN_INLINE enabled [ 39.679086] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.679100] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.679112] CPU: 1 PID: 6425 Comm: syz-executor754 Not tainted 4.19.131-syzkaller #0 [ 39.679119] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.679136] RIP: 0010:do_con_write+0x94d/0x1d90 [ 39.679148] Code: 03 9c 24 ba 00 00 00 01 dd e8 6f ee bd fd 48 8b 44 24 70 80 38 00 0f 85 75 11 00 00 49 8b 9d a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 30 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 39.679155] RSP: 0018:ffff888091d37920 EFLAGS: 00010203 [ 39.679164] RAX: 0000000020000001 RBX: 000000010000000c RCX: ffffffff83abb991 [ 39.679171] RDX: 0000000000000000 RSI: ffffffff83abb9d1 RDI: 0000000000000003 [ 39.679178] RBP: 00000000000007fe R08: ffffffff83aa57c0 R09: 0000000000000000 [ 39.679184] R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000001 [ 39.679192] R13: ffff8880a55ff300 R14: dffffc0000000000 R15: 0000000000000000 [ 39.679202] FS: 0000000001fad880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 39.679209] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.679216] CR2: 00000000004553a0 CR3: 000000009372b000 CR4: 00000000001406e0 [ 39.679227] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.679234] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.679237] Call Trace: [ 39.679258] ? do_con_trol+0x5970/0x5970 [ 39.679269] ? n_tty_write+0x1ea/0xff0 [ 39.679287] ? mark_held_locks+0xa6/0xf0 [ 39.679299] con_write+0x22/0xb0 [ 39.679312] n_tty_write+0x3c0/0xff0 [ 39.679330] ? n_tty_open+0x160/0x160 [ 39.679343] ? do_wait_intr_irq+0x270/0x270 [ 39.679357] ? __might_fault+0x192/0x1d0 [ 39.679370] tty_write+0x496/0x810 [ 39.679381] ? n_tty_open+0x160/0x160 [ 39.679405] __vfs_write+0xf7/0x770 [ 39.679415] ? tty_compat_ioctl+0x270/0x270 [ 39.679429] ? kernel_read+0x110/0x110 [ 39.679445] ? avc_policy_seqno+0x9/0x70 [ 39.679459] ? selinux_file_permission+0x87/0x5f0 [ 39.679474] ? security_file_permission+0x1c0/0x220 [ 39.679491] vfs_write+0x1f3/0x540 [ 39.679506] ksys_write+0x12b/0x2a0 [ 39.679519] ? __ia32_sys_read+0xb0/0xb0 [ 39.679533] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 39.679545] ? trace_hardirqs_off_caller+0x69/0x210 [ 39.679558] ? do_syscall_64+0x21/0x620 [ 39.679573] do_syscall_64+0xf9/0x620 [ 39.679589] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.679597] RIP: 0033:0x440459 [ 39.679609] 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 39.679615] RSP: 002b:00007ffdc888ee88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 39.679626] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440459 [ 39.679632] RDX: 0000000000001006 RSI: 0000000020000240 RDI: 0000000000000004 [ 39.679639] RBP: 00000000006cb018 R08: 000000000000000e R09: 00000000004002c8 [ 39.679646] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401d40 [ 39.679653] R13: 0000000000401dd0 R14: 0000000000000000 R15: 0000000000000000 [ 39.679663] Modules linked in: [ 39.679677] ---[ end trace ac8e59b206f902ab ]--- [ 39.679690] RIP: 0010:do_con_write+0x94d/0x1d90 [ 39.679701] Code: 03 9c 24 ba 00 00 00 01 dd e8 6f ee bd fd 48 8b 44 24 70 80 38 00 0f 85 75 11 00 00 49 8b 9d a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 30 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 39.679707] RSP: 0018:ffff888091d37920 EFLAGS: 00010203 [ 39.679716] RAX: 0000000020000001 RBX: 000000010000000c RCX: ffffffff83abb991 [ 39.679723] RDX: 0000000000000000 RSI: ffffffff83abb9d1 RDI: 0000000000000003 [ 39.679731] RBP: 00000000000007fe R08: ffffffff83aa57c0 R09: 0000000000000000 [ 39.679737] R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000001 [ 39.679760] R13: ffff8880a55ff300 R14: dffffc0000000000 R15: 0000000000000000 [ 39.679770] FS: 0000000001fad880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 39.679778] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.679785] CR2: 00000000004553a0 CR3: 000000009372b000 CR4: 00000000001406e0 [ 39.679795] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.679801] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.679807] Kernel panic - not syncing: Fatal exception [ 39.681058] Kernel Offset: disabled [ 40.101320] Rebooting in 86400 seconds..