[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.130' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 69.186653][ T8492] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor974/8492 [ 69.196127][ T8492] caller is lockdep_hardirqs_on_prepare+0x5e/0x410 [ 69.207815][ T8492] CPU: 0 PID: 8492 Comm: syz-executor974 Not tainted 5.9.0-syzkaller #0 [ 69.216192][ T8492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.226352][ T8492] Call Trace: [ 69.230163][ T8492] dump_stack+0x107/0x163 [ 69.234514][ T8492] check_preemption_disabled+0x123/0x130 [ 69.240611][ T8492] lockdep_hardirqs_on_prepare+0x5e/0x410 [ 69.246679][ T8492] trace_hardirqs_on+0x5b/0x1c0 [ 69.251548][ T8492] __bad_area_nosemaphore+0xc6/0x400 [ 69.257459][ T8492] do_user_addr_fault+0x7d7/0xb40 [ 69.262500][ T8492] exc_page_fault+0x9e/0x180 [ 69.267117][ T8492] ? asm_exc_page_fault+0x8/0x30 [ 69.272088][ T8492] asm_exc_page_fault+0x1e/0x30 [ 69.276955][ T8492] RIP: 0033:0x4241f0 [ 69.280843][ T8492] 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 [ 69.300551][ T8492] RSP: 002b:00007ffe50822018 EFLAGS: 00010246 [ 69.306637][ T8492] RAX: 0000000000000000 RBX: 00007ffe50822040 RCX: 0000000000000000 [ 69.314605][ T8492] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000 [ 69.322604][ T8492] RBP: 0000000000000003 R08: 00000000ffffffff R09: 0000000000000000 [ 69.332058][ T8492] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401d70 [ 69.342206][ T8492] R13: 0000000000401e00 R14: 0000000000000000 R15: 0000000000000000 [ 69.350421][ T8492] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor974/8492 [ 69.359840][ T8492] caller is lockdep_hardirqs_on+0x38/0x110 [ 69.365734][ T8492] CPU: 0 PID: 8492 Comm: syz-executor974 Not tainted 5.9.0-syzkaller #0 [ 69.374097][ T8492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.384187][ T8492] Call Trace: [ 69.387504][ T8492] dump_stack+0x107/0x163 [ 69.391826][ T8492] check_preemption_disabled+0x123/0x130 [ 69.397473][ T8492] ? __bad_area_nosemaphore+0xc6/0x400 [ 69.402938][ T8492] lockdep_hardirqs_on+0x38/0x110 [ 69.407965][ T8492] __bad_area_nosemaphore+0xc6/0x400 [ 69.413253][ T8492] do_user_addr_fault+0x7d7/0xb40 [ 69.418287][ T8492] exc_page_fault+0x9e/0x180 [ 69.422886][ T8492] ? asm_exc_page_fault+0x8/0x30 [ 69.427842][ T8492] asm_exc_page_fault+0x1e/0x30 [ 69.432689][ T8492] RIP: 0033:0x4241f0 [ 69.436603][