[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.11' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.340938][ T8494] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor706/8494 [ 62.351047][ T8494] caller is lockdep_hardirqs_on_prepare+0x5e/0x410 [ 62.357583][ T8494] CPU: 1 PID: 8494 Comm: syz-executor706 Not tainted 5.9.0-syzkaller #0 [ 62.365884][ T8494] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.375929][ T8494] Call Trace: [ 62.379210][ T8494] dump_stack+0x107/0x163 [ 62.383525][ T8494] check_preemption_disabled+0x123/0x130 [ 62.389164][ T8494] lockdep_hardirqs_on_prepare+0x5e/0x410 [ 62.394881][ T8494] trace_hardirqs_on+0x5b/0x1c0 [ 62.399736][ T8494] __bad_area_nosemaphore+0xc6/0x400 [ 62.405001][ T8494] do_user_addr_fault+0x7d7/0xb40 [ 62.410010][ T8494] exc_page_fault+0x9e/0x180 [ 62.414579][ T8494] ? asm_exc_page_fault+0x8/0x30 [ 62.419691][ T8494] asm_exc_page_fault+0x1e/0x30 [ 62.424519][ T8494] RIP: 0033:0x4242d0 [ 62.428484][ T8494] 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 [ 62.448084][ T8494] RSP: 002b:00007ffda304e058 EFLAGS: 00010246 [ 62.454132][ T8494] RAX: 0000000000000000 RBX: 00007ffda304e080 RCX: 0000000000000000 [ 62.462084][ T8494] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000 [ 62.470055][ T8494] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 62.478004][ T8494] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401e50 [ 62.485955][ T8494] R13: 0000000000401ee0 R14: 0000000000000000 R15: 0000000000000000 [ 62.494499][ T8494] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor706/8494 [ 62.503935][ T8494] caller is lockdep_hardirqs_on+0x38/0x110 [ 62.509831][ T8494] CPU: 1 PID: 8494 Comm: syz-executor706 Not tainted 5.9.0-syzkaller #0 [ 62.518138][ T8494] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.528172][ T8494] Call Trace: [ 62.531448][ T8494] dump_stack+0x107/0x163 [ 62.535756][ T8494] check_preemption_disabled+0x123/0x130 [ 62.541386][ T8494] ? __bad_area_nosemaphore+0xc6/0x400 [ 62.546833][ T8494] lockdep_hardirqs_on+0x38/0x110 [ 62.551839][ T8494] __bad_area_nosemaphore+0xc6/0x400 [ 62.557106][ T8494] do_user_addr_fault+0x7d7/0xb40 [ 62.562135][ T8494] exc_page_fault+0x9e/0x180 [ 62.566705][ T8494] ? asm_exc_page_fault+0x8/0x30 [ 62.571637][ T8494] asm_exc_page_fault+0x1e/0x30 [ 62.576464][ T8494] RIP: 0033:0x4242d0 [ 62.580341][ T8494] 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 [ 62.599923][ T8494] RSP: 002b:00007ffda304e058 EFLAGS: 00010246 [ 62.605987][ T8494] RAX: 0000000000000000 RBX: 00007ffda304e080 RCX: 0000000000000000 [ 62.613958][ T8494] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000 [ 62.621909][ T8494] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 62.629860][ T8494] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401e50 [ 62.637812][ T8494] R13: 0000000000401ee0 R14: 000