[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.964877][ T8474] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor290/8474 [ 63.974430][ T8474] caller is lockdep_hardirqs_on_prepare+0x5e/0x410 [ 63.981705][ T8474] CPU: 0 PID: 8474 Comm: syz-executor290 Not tainted 5.9.0-syzkaller #0 [ 63.990038][ T8474] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.000115][ T8474] Call Trace: [ 64.003409][ T8474] dump_stack+0x107/0x163 [ 64.007770][ T8474] check_preemption_disabled+0x123/0x130 [ 64.013467][ T8474] lockdep_hardirqs_on_prepare+0x5e/0x410 [ 64.019174][ T8474] trace_hardirqs_on+0x5b/0x1c0 [ 64.024008][ T8474] __bad_area_nosemaphore+0xc6/0x400 [ 64.029278][ T8474] do_user_addr_fault+0x7d7/0xb40 [ 64.034289][ T8474] exc_page_fault+0x9e/0x180 [ 64.038907][ T8474] ? asm_exc_page_fault+0x8/0x30 [ 64.043822][ T8474] asm_exc_page_fault+0x1e/0x30 [ 64.048696][ T8474] RIP: 0033:0x424260 [ 64.052610][ T8474] Code: 66 0f ef c0 66 0f ef c9 66 0f ef d2 66 0f ef db 48 89 f8 48 89 f9 48 81 e1 ff 0f 00 00 48 81 f9 cf 0f 00 00 77 74 48 83 e0 f0 <66> 0f 74 00 66 0f 74 48 10 66 0f 74 50 20 66 0f 74 58 30 66 0f d7 [ 64.072194][ T8474] RSP: 002b:00007fff7a70da88 EFLAGS: 00010246 [ 64.078269][ T8474] RAX: 0000000000000000 RBX: 00007fff7a70dab0 RCX: 0000000000000000 [ 64.086292][ T8474] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000 [ 64.094243][ T8474] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 64.102194][ T8474] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401de0 [ 64.110146][ T8474] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 64.118289][ T8474] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor290/8474 [ 64.127696][ T8474] caller is lockdep_hardirqs_on+0x38/0x110 [ 64.133504][ T8474] CPU: 0 PID: 8474 Comm: syz-executor290 Not tainted 5.9.0-syzkaller #0 [ 64.141806][ T8474] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.151838][ T8474] Call Trace: [ 64.155122][ T8474] dump_stack+0x107/0x163 [ 64.159462][ T8474] check_preemption_disabled+0x123/0x130 [ 64.165077][ T8474] ? __bad_area_nosemaphore+0xc6/0x400 [ 64.170604][ T8474] lockdep_hardirqs_on+0x38/0x110 [ 64.175618][ T8474] __bad_area_nosemaphore+0xc6/0x400 [ 64.180900][ T8474] do_user_addr_fault+0x7d7/0xb40 [ 64.185918][ T8474] exc_page_fault+0x9e/0x180 [ 64.190491][ T8474] ? asm_exc_page_fault+0x8/0x30 [ 64.195407][ T8474] asm_exc_page_fault+0x1e/0x30 [ 64.200235][ T8474] RIP: 0033:0x424260 [ 64.204125][ T8474] Code: 66 0f ef c0 66 0f ef c9 66 0f ef d2 66 0f ef db 48 89 f8 48 89 f9 48 81 e1 ff 0f 00 00 48 81 f9 cf 0f 00 00 77 74 48 83 e0 f0 <66> 0f 74 00 66 0f 74 48 10 66 0f 74 50 20 66 0f 74 58 30 66 0f d7 [ 64.223730][ T8474] RSP: 002b:00007fff7a70da88 EFLAGS: 00010246 [ 64.229781][ T8474] RAX: 0000000000000000 RBX: 00007fff7a70dab0 RCX: 0000000000000000 [ 64.237861][ T8474] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000 [ 64.245828][ T8474] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 64.253833][ T8474] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401de0 [ 64.261831][ T8474] R13: 0000000000401e70 R14: 000