[ 34.166580] audit: type=1800 audit(1561500117.543:33): pid=6884 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 34.194918] audit: type=1800 audit(1561500117.543:34): pid=6884 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.389151] random: sshd: uninitialized urandom read (32 bytes read) [ 37.694921] audit: type=1400 audit(1561500121.073:35): avc: denied { map } for pid=7058 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 37.748211] random: sshd: uninitialized urandom read (32 bytes read) [ 38.359922] random: sshd: uninitialized urandom read (32 bytes read) [ 54.283205] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.236' (ECDSA) to the list of known hosts. [ 59.842037] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 59.979570] audit: type=1400 audit(1561500143.353:36): avc: denied { map } for pid=7070 comm="syz-executor399" path="/root/syz-executor399564363" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 60.008135] 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. [ 60.280412] ------------[ cut here ]------------ [ 60.285413] WARNING: CPU: 1 PID: 7072 at arch/x86/kvm/x86.c:7464 kvm_arch_vcpu_ioctl_run+0xf5/0x1000 [ 60.294781] Kernel panic - not syncing: panic_on_warn set ... [ 60.294781] [ 60.302159] CPU: 1 PID: 7072 Comm: syz-executor399 Not tainted 4.14.130 #24 [ 60.309466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.319012] Call Trace: [ 60.321633] dump_stack+0x138/0x19c [ 60.325438] panic+0x1f2/0x426 [ 60.328641] ? add_taint.cold+0x16/0x16 [ 60.332712] ? kvm_arch_vcpu_ioctl_run+0xf5/0x1000 [ 60.337653] ? kvm_arch_vcpu_ioctl_run+0xf5/0x1000 [ 60.342691] __warn.cold+0x2f/0x36 [ 60.346360] ? ist_end_non_atomic+0x10/0x10 [ 60.350818] ? kvm_arch_vcpu_ioctl_run+0xf5/0x1000 [ 60.355751] report_bug+0x216/0x254 [ 60.359424] do_error_trap+0x1bb/0x310 [ 60.363352] ? math_error+0x360/0x360 [ 60.367281] ? lock_downgrade+0x6e0/0x6e0 [ 60.371423] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 60.376266] do_invalid_op+0x1b/0x20 [ 60.379985] invalid_op+0x1b/0x40 [ 60.383578] RIP: 0010:kvm_arch_vcpu_ioctl_run+0xf5/0x1000 [ 60.389208] RSP: 0018:ffff888081ae7bd8 EFLAGS: 00010297 [ 60.394599] RAX: ffff888095c38140 RBX: ffff888081149000 RCX: ffff8880820f845c [ 60.402008] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880820f8268 [ 60.410211] RBP: ffff888081ae7c30 R08: 0000000000000001 R09: ffff888095c389e0 [ 60.417547] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880820f8040 [ 60.424812] R13: 0000000000000000 R14: ffff8880820f8040 R15: ffff8880820f8118 [ 60.432106] ? kvm_arch_vcpu_ioctl_run+0xf5/0x1000 [ 60.437166] ? put_pid_ns+0x5e/0x110 [ 60.440901] kvm_vcpu_ioctl+0x401/0xd10 [ 60.444867] ? kvm_vcpu_block+0xbb0/0xbb0 [ 60.449018] ? trace_hardirqs_on+0x10/0x10 [ 60.453252] ? __lock_acquire+0x5f9/0x45e0 [ 60.457480] ? save_trace+0x290/0x290 [ 60.461317] ? __fget+0x210/0x370 [ 60.464779] ? find_held_lock+0x35/0x130 [ 60.468954] ? __fget+0x210/0x370 [ 60.472538] ? kvm_vcpu_block+0xbb0/0xbb0 [ 60.476688] do_vfs_ioctl+0x7ae/0x1060 [ 60.480596] ? selinux_file_mprotect+0x5d0/0x5d0 [ 60.485348] ? lock_downgrade+0x6e0/0x6e0 [ 60.489500] ? ioctl_preallocate+0x1c0/0x1c0 [ 60.494155] ? __fget+0x237/0x370 [ 60.497751] ? security_file_ioctl+0x7d/0xb0 [ 60.502354] ? security_file_ioctl+0x89/0xb0 [ 60.506763] SyS_ioctl+0x8f/0xc0 [ 60.510411] ? do_vfs_ioctl+0x1060/0x1060 [ 60.514570] do_syscall_64+0x1e8/0x640 [ 60.518595] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 60.523851] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 60.529070] RIP: 0033:0x448cb9 [ 60.532368] RSP: 002b:00007fa5f3bcace8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 60.540165] RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 0000000000448cb9 [ 60.547538] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 [ 60.555255] RBP: 00000000006ddc50 R08: 00007fa5f3bcb700 R09: 0000000000000000 [ 60.562887] R10: 00007fa5f3bcb700 R11: 0000000000000246 R12: 00000000006ddc5c [ 60.570287] R13: 00007ffc6cba3fff R14: 00007fa5f3bcb9c0 R15: 20c49ba5e353f7cf [ 60.579327] Kernel Offset: disabled [ 60.583075] Rebooting in 86400 seconds..