[ 45.268418][ T27] audit: type=1800 audit(1584866991.795:26): pid=8232 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 45.308374][ T27] audit: type=1800 audit(1584866991.805:27): pid=8232 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 45.348368][ T27] audit: type=1800 audit(1584866991.805:28): pid=8232 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 46.006141][ T27] audit: type=1800 audit(1584866992.555:29): pid=8232 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.161' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 56.411608][ T8387] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. 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 [ 57.199387][ T8439] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 57.207287][ T8439] #PF: supervisor instruction fetch in kernel mode [ 57.213755][ T8439] #PF: error_code(0x0010) - not-present page [ 57.219722][ T8439] PGD 9330b067 P4D 9330b067 PUD 9e66f067 PMD 0 [ 57.225975][ T8439] Oops: 0010 [#1] PREEMPT SMP KASAN [ 57.231181][ T8439] CPU: 1 PID: 8439 Comm: syz-executor724 Not tainted 5.6.0-rc6-syzkaller #0 [ 57.239825][ T8439] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.249854][ T8439] RIP: 0010:0x86 [ 57.253431][ T8439] Code: Bad RIP value. [ 57.257469][ T8439] RSP: 0018:ffffc900022e7998 EFLAGS: 00010086 [ 57.263503][ T8439] RAX: ffffc900022e79c8 RBX: fffffe0000000000 RCX: ffff88809dcf2500 [ 57.271462][ T8439] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 57.279441][ T8439] RBP: 0000000000000ec0 R08: ffffffff83987523 R09: ffffffff811c7eca [ 57.287385][ T8439] R10: ffff88809dcf2500 R11: 0000000000000002 R12: dffffc0000000000 [ 57.295328][ T8439] R13: fffffe0000000ec8 R14: ffffffff880016f0 R15: fffffe0000000ecb [ 57.303273][ T8439] FS: 0000000001d0d880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 57.312171][ T8439] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.318745][ T8439] CR2: 000000000000005c CR3: 00000000978c3000 CR4: 00000000001426e0 [ 57.326697][ T8439] Call Trace: [ 57.329971][ T8439] ? handle_external_interrupt_irqoff+0x154/0x280 [ 57.336397][ T8439] ? handle_external_interrupt_irqoff+0x132/0x280 [ 57.342784][ T8439] ? __irqentry_text_start+0x8/0x8 [ 57.347980][ T8439] ? vcpu_enter_guest+0x6c77/0x9290 [ 57.353158][ T8439] ? __kasan_slab_free+0x12e/0x1e0 [ 57.358243][ T8439] ? kfree+0x10a/0x220 [ 57.362289][ T8439] ? tomoyo_path_number_perm+0x525/0x690 [ 57.367894][ T8439] ? security_file_ioctl+0x55/0xb0 [ 57.373022][ T8439] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.379066][ T8439] ? __lock_acquire+0xc5a/0x1bc0 [ 57.383975][ T8439] ? x2apic_send_IPI+0x96/0xc0 [ 57.388717][ T8439] ? mark_lock+0x107/0x1650 [ 57.393190][ T8439] ? lock_acquire+0x154/0x250 [ 57.397882][ T8439] ? rcu_lock_acquire+0x9/0x30 [ 57.402659][ T8439] ? vcpu_run+0x3a3/0xd50 [ 57.407003][ T8439] ? kvm_arch_vcpu_ioctl_run+0x419/0x880 [ 57.412611][ T8439] ? kvm_vcpu_ioctl+0x67c/0xa80 [ 57.417434][ T8439] ? rcu_read_lock_sched_held+0x106/0x170 [ 57.423162][ T8439] ? kvm_vm_release+0x50/0x50 [ 57.427807][ T8439] ? __se_sys_ioctl+0xf9/0x160 [ 57.432552][ T8439] ? do_syscall_64+0xf3/0x1b0 [ 57.437211][ T8439] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.443338][ T8439] Modules linked in: [ 57.447203][ T8439] CR2: 0000000000000086 [ 57.451336][ T8439] ---[ end trace 480d6b60d5a9226d ]--- [ 57.456766][ T8439] RIP: 0010:0x86 [ 57.460291][ T8439] Code: Bad RIP value. [ 57.464327][ T8439] RSP: 0018:ffffc900022e7998 EFLAGS: 00010086 [ 57.470374][ T8439] RAX: ffffc900022e79c8 RBX: fffffe0000000000 RCX: ffff88809dcf2500 [ 57.478337][ T8439] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 57.487756][ T8439] RBP: 0000000000000ec0 R08: ffffffff83987523 R09: ffffffff811c7eca [ 57.495711][ T8439] R10: ffff88809dcf2500 R11: 0000000000000002 R12: dffffc0000000000 [ 57.503653][ T8439] R13: fffffe0000000ec8 R14: ffffffff880016f0 R15: fffffe0000000ecb [ 57.511598][ T8439] FS: 0000000001d0d880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 57.520498][ T8439] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.527062][ T8439] CR2: 000000000000005c CR3: 00000000978c3000 CR4: 00000000001426e0 [ 57.535008][ T8439] Kernel panic - not syncing: Fatal exception [ 57.542343][ T8439] Kernel Offset: disabled [ 57.546661][ T8439] Rebooting in 86400 seconds..