[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.873895] random: sshd: uninitialized urandom read (32 bytes read) [ 26.023327] audit: type=1400 audit(1543108479.449:6): avc: denied { map } for pid=1760 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 [ 26.071988] random: sshd: uninitialized urandom read (32 bytes read) [ 26.504789] random: sshd: uninitialized urandom read (32 bytes read) [ 41.406793] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.17' (ECDSA) to the list of known hosts. [ 46.966855] random: sshd: uninitialized urandom read (32 bytes read) [ 47.060343] audit: type=1400 audit(1543108500.489:7): avc: denied { map } for pid=1784 comm="syz-executor583" path="/root/syz-executor583594478" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 47.062278] uinput: invalid abs[2f] min:0 max:-8 [ 47.062332] ------------[ cut here ]------------ [ 47.062349] WARNING: CPU: 0 PID: 1784 at mm/page_alloc.c:3889 __alloc_pages_nodemask+0x1662/0x2300 [ 47.062353] Kernel panic - not syncing: panic_on_warn set ... [ 47.062353] [ 47.062361] CPU: 0 PID: 1784 Comm: syz-executor583 Not tainted 4.14.83+ #9 [ 47.062364] Call Trace: [ 47.062374] dump_stack+0xb9/0x11b [ 47.062385] ? __alloc_pages_nodemask+0x15f0/0x2300 [ 47.062393] panic+0x1bf/0x3a4 [ 47.062401] ? add_taint.cold.4+0x16/0x16 [ 47.062414] ? __probe_kernel_read+0x163/0x1c0 [ 47.062428] ? __alloc_pages_nodemask+0x1662/0x2300 [ 47.062436] __warn.cold.7+0x2f/0x35 [ 47.062445] ? __alloc_pages_nodemask+0x1662/0x2300 [ 47.062454] report_bug+0x1f7/0x26c [ 47.062468] do_error_trap+0x1ba/0x2c0 [ 47.062486] ? math_error+0x2d0/0x2d0 [ 47.062497] ? unwind_next_frame+0xea9/0x1930 [ 47.062514] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.062531] invalid_op+0x18/0x40 [ 47.062539] RIP: 0010:__alloc_pages_nodemask+0x1662/0x2300 [ 47.062553] RSP: 0018:ffff8801d038f8c0 EFLAGS: 00010246 [ 47.062560] RAX: 00000000ffff9d32 RBX: 0000000000000000 RCX: ffffffff962214d0 [ 47.062565] RDX: 1ffffffff2bc1200 RSI: 0000000000000001 RDI: 000000000140c0c0 [ 47.062569] RBP: ffff8801d1d7de00 R08: 0000000000000001 R09: fffffffffc0b7cd6 [ 47.062573] R10: ffff8801d1d7e658 R11: 0000000000000000 R12: 000000000140c0c0 [ 47.062578] R13: 0000000000000000 R14: 000000000140c0c0 R15: ffff8801d038fad0 [ 47.062607] ? quarantine_put+0xd5/0x180 [ 47.062626] ? trace_hardirqs_on+0x10/0x10 [ 47.062637] ? gfp_pfmemalloc_allowed+0x150/0x150 [ 47.062644] ? lock_acquire+0x10f/0x380 [ 47.062653] ? uinput_ioctl_handler.isra.4+0xa0/0x1850 [ 47.062669] ? __mutex_lock+0x6f4/0x1480 [ 47.062686] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 47.062695] ? lock_downgrade+0x560/0x560 [ 47.062700] ? lock_acquire+0x10f/0x380 [ 47.062710] ? avc_has_extended_perms+0xd8/0xd50 [ 47.062721] ? check_preemption_disabled+0x34/0x1e0 [ 47.062735] kmalloc_order+0x1f/0x60 [ 47.062744] kmalloc_order_trace+0x18/0x160 [ 47.062757] input_mt_init_slots+0xc7/0x3f0 [ 47.062771] uinput_ioctl_handler.isra.4+0x14fd/0x1850 [ 47.062781] ? uinput_request_submit.part.3+0x280/0x280 [ 47.062787] ? uinput_write+0x88/0xce0 [ 47.062802] ? uinput_ioctl+0x50/0x50 [ 47.062808] ? lock_acquire+0x10f/0x380 [ 47.062815] ? debug_check_no_obj_freed+0x150/0x77c [ 47.062840] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 47.062875] ? uinput_compat_ioctl+0x80/0x80 [ 47.062887] do_vfs_ioctl+0x1a0/0x1030 [ 47.062900] ? ioctl_preallocate+0x1d0/0x1d0 [ 47.062908] ? avc_policy_seqno+0x5/0x10 [ 47.062915] ? selinux_file_permission+0x79/0x440 [ 47.062925] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 47.062945] ? vfs_write+0x318/0x4d0 [ 47.062962] ? security_file_ioctl+0x7c/0xb0 [ 47.062974] SyS_ioctl+0x7e/0xb0 [ 47.062981] ? do_vfs_ioctl+0x1030/0x1030 [ 47.062990] do_syscall_64+0x19b/0x4b0 [ 47.063006] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 47.063011] RIP: 0033:0x441859 [ 47.063015] RSP: 002b:00007fffef651bc8 EFLAGS: 00000286 ORIG_RAX: 0000000000000010 [ 47.063022] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441859 [ 47.063026] RDX: 0000000000441859 RSI: 0000000000005501 RDI: 0000000000000003 [ 47.063031] RBP: 0000000000000000 R08: 00007fffef651d48 R09: 00007fffef651d48 [ 47.063035] R10: 00007fffef651d48 R11: 0000000000000286 R12: 0000000000000000 [ 47.063039] R13: 0000000000000000 R14: 0000000000000000 R15: 00000000317a7973 [ 47.086826] Kernel Offset: 0x12a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 47.430845] Rebooting in 86400 seconds..