[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.39' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 64.512976][ T8497] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor931/8497 [ 64.522470][ T8497] caller is lockdep_hardirqs_on_prepare+0x5e/0x410 [ 64.529591][ T8497] CPU: 0 PID: 8497 Comm: syz-executor931 Not tainted 5.9.0-syzkaller #0 [ 64.537914][ T8497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.547948][ T8497] Call Trace: [ 64.551266][ T8497] dump_stack+0x107/0x163 [ 64.555577][ T8497] check_preemption_disabled+0x123/0x130 [ 64.561238][ T8497] lockdep_hardirqs_on_prepare+0x5e/0x410 [ 64.567044][ T8497] trace_hardirqs_on+0x5b/0x1c0 [ 64.571878][ T8497] __bad_area_nosemaphore+0xc6/0x400 [ 64.577210][ T8497] do_user_addr_fault+0x7d7/0xb40 [ 64.582221][ T8497] exc_page_fault+0x9e/0x180 [ 64.586801][ T8497] ? asm_exc_page_fault+0x8/0x30 [ 64.591733][ T8497] asm_exc_page_fault+0x1e/0x30 [ 64.596561][ T8497] RIP: 0033:0x424270 [ 64.600436][ T8497] 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 [ 64.620040][ T8497] RSP: 002b:00007ffc60858b38 EFLAGS: 00010246 [ 64.626088][ T8497] RAX: 0000000000000000 RBX: 00007ffc60858b60 RCX: 0000000000000000 [ 64.634059][ T8497] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000 [ 64.642008][ T8497] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 64.649970][ T8497] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401df0 [ 64.657920][ T8497] R13: 0000000000401e80 R14: 0000000000000000 R15: 0000000000000000 [ 64.666007][ T8497] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor931/8497 [ 64.675400][ T8497] caller is lockdep_hardirqs_on+0x38/0x110 [ 64.681248][ T8497] CPU: 0 PID: 8497 Comm: syz-executor931 Not tainted 5.9.0-syzkaller #0 [ 64.689565][ T8497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.699596][ T8497] Call Trace: [ 64.702868][ T8497] dump_stack+0x107/0x163 [ 64.707177][ T8497] check_preemption_disabled+0x123/0x130 [ 64.712787][ T8497] ? __bad_area_nosemaphore+0xc6/0x400 [ 64.718239][ T8497] lockdep_hardirqs_on+0x38/0x110 [ 64.723240][ T8497] __bad_area_nosemaphore+0xc6/0x400 [ 64.728509][ T8497] do_user_addr_fault+0x7d7/0xb40 [ 64.733518][ T8497] exc_page_fault+0x9e/0x180 [ 64.738085][ T8497] ? asm_exc_page_fault+0x8/0x30 [ 64.742997][ T8497] asm_exc_page_fault+0x1e/0x30 [ 64.747833][ T8497] RIP: 0033:0x424270 [ 64.751705][ T8497] 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