[ 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... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.318432][ T6901] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor089/6901 [ 59.328238][ T6901] caller is lockdep_hardirqs_on_prepare+0x5e/0x450 [ 59.335423][ T6901] CPU: 0 PID: 6901 Comm: syz-executor089 Not tainted 5.9.0-syzkaller #0 [ 59.344752][ T6901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.354910][ T6901] Call Trace: [ 59.358191][ T6901] dump_stack+0x198/0x1fb [ 59.362522][ T6901] check_preemption_disabled+0x128/0x130 [ 59.368157][ T6901] lockdep_hardirqs_on_prepare+0x5e/0x450 [ 59.373858][ T6901] trace_hardirqs_on+0x5b/0x1c0 [ 59.378692][ T6901] __bad_area_nosemaphore+0xc6/0x4f0 [ 59.383972][ T6901] do_user_addr_fault+0x852/0xbf0 [ 59.389164][ T6901] exc_page_fault+0xa8/0x190 [ 59.393753][ T6901] ? asm_exc_page_fault+0x8/0x30 [ 59.398704][ T6901] asm_exc_page_fault+0x1e/0x30 [ 59.403613][ T6901] RIP: 0033:0x4241f0 [ 59.407516][ T6901] 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 [ 59.427288][ T6901] RSP: 002b:00007ffcacd310b8 EFLAGS: 00010246 [ 59.433350][ T6901] RAX: 0000000000000000 RBX: 00007ffcacd310e0 RCX: 0000000000000000 [ 59.441316][ T6901] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000 [ 59.449552][ T6901] RBP: 0000000000000003 R08: 00000000ffffffff R09: 0000000000000000 [ 59.457513][ T6901] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401d70 [ 59.466611][ T6901] R13: 0000000000401e00 R14: 0000000000000000 R15: 0000000000000000 [ 59.475656][ T6901] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor089/6901 [ 59.485065][ T6901] caller is lockdep_hardirqs_on+0x34/0x110 [ 59.490855][ T6901] CPU: 0 PID: 6901 Comm: syz-executor089 Not tainted 5.9.0-syzkaller #0 [ 59.500714][ T6901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.510748][ T6901] Call Trace: [ 59.514026][ T6901] dump_stack+0x198/0x1fb [ 59.518337][ T6901] check_preemption_disabled+0x128/0x130 [ 59.524092][ T6901] ? __bad_area_nosemaphore+0xc6/0x4f0 [ 59.529568][ T6901] lockdep_hardirqs_on+0x34/0x110 [ 59.534583][ T6901] __bad_area_nosemaphore+0xc6/0x4f0 [ 59.539854][ T6901] do_user_addr_fault+0x852/0xbf0 [ 59.544869][ T6901] exc_page_fault+0xa8/0x190 [ 59.549444][ T6901] ? asm_exc_page_fault+0x8/0x30 [ 59.554371][ T6901] asm_exc_page_fault+0x1e/0x30 [ 59.559208][ T6901] RIP: 0033:0x4241f0 [ 59.563084][ T6901] 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 [ 59.582679][ T6901] RSP: 002b:00007ffcacd310b8 EFLAGS: 00010246 [ 59.589004][ T6901] RAX: 0000000000000000 RBX: 00007ffcacd310e0 RCX: 0000000000000000 [ 59.597448][ T6901] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000 [ 59.605500][ T6901] RBP: 0000000000000003 R08: 00000000ffffffff R09: 0000000000000000 [ 59.614335][ T6901] R10: 0000000000000000 R11: 00000000000