INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-kasan-gce-0,10.128.15.196' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 52.456611] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 55.617396] [ 55.635817] ============================= executing program executing program executing program [ 55.657880] WARNING: suspicious RCU usage [ 55.673891] 4.13.0-rc7+ #64 Not tainted [ 55.685098] ----------------------------- [ 55.691242] ./include/linux/kvm_host.h:481 suspicious rcu_dereference_check() usage! [ 55.702555] [ 55.702555] other info that might help us debug this: [ 55.702555] [ 55.718128] [ 55.718128] rcu_scheduler_active = 2, debug_locks = 1 [ 55.731773] no locks held by syzkaller388900/5999. [ 55.741755] [ 55.741755] stack backtrace: [ 55.752758] CPU: 1 PID: 5999 Comm: syzkaller388900 Not tainted 4.13.0-rc7+ #64 [ 55.760111] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.769445] Call Trace: [ 55.772019] dump_stack+0x194/0x257 [ 55.775638] ? arch_local_irq_restore+0x53/0x53 [ 55.780306] lockdep_rcu_suspicious+0x123/0x170 [ 55.784964] kvm_dev_ioctl+0x877/0x1840 [ 55.788916] ? lock_downgrade+0x990/0x990 [ 55.793059] ? install_new_memslots+0x420/0x420 [ 55.797734] ? avc_has_extended_perms+0x7fa/0x12c0 [ 55.802642] ? find_held_lock+0x35/0x1d0 [ 55.806701] ? avc_ss_reset+0x110/0x110 [ 55.810651] ? lock_downgrade+0x990/0x990 [ 55.814783] ? lock_release+0xa40/0xa40 [ 55.818745] ? __lock_is_held+0xb6/0x140 [ 55.822830] ? check_same_owner+0x320/0x320 [ 55.827152] ? install_new_memslots+0x420/0x420 [ 55.831804] do_vfs_ioctl+0x1b1/0x1520 [ 55.835685] ? ioctl_preallocate+0x2b0/0x2b0 [ 55.840080] ? selinux_capable+0x40/0x40 [ 55.844121] ? lock_release+0x91/0xa40 [ 55.848001] ? syscall_return_slowpath+0x22f/0x450 [ 55.852922] ? security_file_ioctl+0x7d/0xb0 [ 55.857308] ? security_file_ioctl+0x89/0xb0 [ 55.861703] SyS_ioctl+0x8f/0xc0 [ 55.865061] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 55.869798] RIP: 0033:0x4462a9 [ 55.872974] RSP: 002b:00007fdfef477dc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 55.880664] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004462a9 [ 55.887913] RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000007 [ 55.895162] RBP: 0000000000000086 R08: 00007fdfef478700 R09: 00007fdfef478700 executing program executing program executing program executing program executing program [ 55.902408] R10: 00007fdfef478700 R11: 0000000000000202 R12: 0000000000000000 [ 55.909655] R13: 00007fff128bf81f R14: 00007fdfef4789c0 R15: 0000000000000000 [ 55.917320] executing program executing program [ 55.953414] ============================= [ 55.963951] WARNING: suspicious RCU usage [ 55.989461] 4.13.0-rc7+ #64 Not tainted executing program executing program [ 56.000939] ----------------------------- [ 56.007100] ./include/linux/kvm_host.h:575 suspicious rcu_dereference_check() usage! [ 56.016357] [ 56.016357] other info that might help us debug this: [ 56.016357] [ 56.025962] [ 56.025962] rcu_scheduler_active = 2, debug_locks = 1 executing program executing program executing program executing program executing program [ 56.056338] no locks held by syzkaller388900/5999. executing program executing program [ 56.082656] [ 56.082656] stack backtrace: [ 56.090302] CPU: 1 PID: 5999 Comm: syzkaller388900 Not tainted 4.13.0-rc7+ #64 [ 56.097665] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.107003] Call Trace: [ 56.109586] dump_stack+0x194/0x257 [ 56.113213] ? arch_local_irq_restore+0x53/0x53 [ 56.117892] lockdep_rcu_suspicious+0x123/0x170 [ 56.122558] kvm_dev_ioctl+0xd21/0x1840 [ 56.126521] ? lock_downgrade+0x990/0x990 [ 56.130672] ? install_new_memslots+0x420/0x420 [ 56.135355] ? avc_has_extended_perms+0x7fa/0x12c0 [ 56.140266] ? find_held_lock+0x35/0x1d0 [ 56.144324] ? avc_ss_reset+0x110/0x110 [ 56.148275] ? lock_downgrade+0x990/0x990 [ 56.152409] ? lock_release+0xa40/0xa40 [ 56.156372] ? __lock_is_held+0xb6/0x140 [ 56.160456] ? check_same_owner+0x320/0x320 [ 56.164783] ? install_new_memslots+0x420/0x420 [ 56.169434] do_vfs_ioctl+0x1b1/0x1520 [ 56.173313] ? ioctl_preallocate+0x2b0/0x2b0 [ 56.177707] ? selinux_capable+0x40/0x40 [ 56.181749] ? lock_release+0x91/0xa40 [ 56.185628] ? syscall_return_slowpath+0x22f/0x450 [ 56.190551] ? security_file_ioctl+0x7d/0xb0 [ 56.194936] ? security_file_ioctl+0x89/0xb0 [ 56.199333] SyS_ioctl+0x8f/0xc0 [ 56.202690] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 56.207423] RIP: 0033:0x4462a9 [ 56.210592] RSP: 002b:00007fdfef477dc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 56.218276] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004462a9 [ 56.225523] RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000007 executing program executing program executing program executing program [ 56.232771] RBP: 0000000000000086 R08: 00007fdfef478700 R09: 00007fdfef478700 [ 56.240020] R10: 00007fdfef478700 R11: 0000000000000202 R12: 0000000000000000 [ 56.247269] R13: 00007fff128bf81f R14: 00007fdfef4789c0 R15: 0000000000000000 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program