[ 12.702866] random: sshd: uninitialized urandom read (32 bytes read) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.679195] random: sshd: uninitialized urandom read (32 bytes read) [ 16.926184] audit: type=1400 audit(1574921827.067:6): avc: denied { map } for pid=1767 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 [ 16.972845] random: sshd: uninitialized urandom read (32 bytes read) [ 17.516708] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. [ 23.237012] urandom_read: 1 callbacks suppressed [ 23.237016] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 23.332429] audit: type=1400 audit(1574921833.477:7): avc: denied { map } for pid=1785 comm="syz-executor358" path="/root/syz-executor358943055" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 23.334755] ------------[ cut here ]------------ [ 23.364467] WARNING: CPU: 0 PID: 1785 at mm/page_alloc.c:4245 __alloc_pages_nodemask+0x3d5/0x2370 [ 23.373634] Kernel panic - not syncing: panic_on_warn set ... [ 23.373634] [ 23.380990] CPU: 0 PID: 1785 Comm: syz-executor358 Not tainted 4.14.156-syzkaller #0 [ 23.389024] Call Trace: [ 23.391607] dump_stack+0xe5/0x154 [ 23.395133] panic+0x1f1/0x3da [ 23.398309] ? add_taint.cold+0x16/0x16 [ 23.402312] ? __alloc_pages_nodemask+0x3d5/0x2370 [ 23.407226] ? __probe_kernel_read+0x163/0x1c0 [ 23.411881] ? __alloc_pages_nodemask+0x3d5/0x2370 [ 23.416789] __warn.cold+0x2f/0x33 [ 23.420313] ? __alloc_pages_nodemask+0x3d5/0x2370 [ 23.425232] report_bug+0x20a/0x248 [ 23.428840] do_error_trap+0x1bf/0x2d0 [ 23.432714] ? math_error+0x2d0/0x2d0 [ 23.436495] ? trace_hardirqs_on_caller+0x37b/0x540 [ 23.441493] ? __lock_acquire+0x5d7/0x4320 [ 23.445710] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.450539] invalid_op+0x18/0x40 [ 23.453997] RIP: 0010:__alloc_pages_nodemask+0x3d5/0x2370 [ 23.459619] RSP: 0018:ffff8881bf317938 EFLAGS: 00010246 [ 23.464963] RAX: 0000000000000000 RBX: 1ffff11037e62f3b RCX: 0000000000000000 [ 23.472216] RDX: 0000000000000000 RSI: 0000000000000014 RDI: 0000000000000000 [ 23.479484] RBP: 0000000080265220 R08: 0000000000002dc0 R09: ffffed1039955752 [ 23.486773] R10: ffff8881bf317bc8 R11: ffff8881ccaaba8f R12: 000000000140c0c0 [ 23.494023] R13: 0000000000000000 R14: ffff8881cc955d80 R15: ffff8881cc955da8 [ 23.501308] ? lock_acquire+0x12b/0x360 [ 23.505274] ? uinput_ioctl_handler.isra.0+0xa6/0x1850 [ 23.510531] ? gfp_pfmemalloc_allowed+0x150/0x150 [ 23.515370] ? avc_has_extended_perms+0x5e0/0xc20 [ 23.520196] ? lock_downgrade+0x630/0x630 [ 23.524330] ? avc_has_extended_perms+0xd0/0xc20 [ 23.529072] ? check_preemption_disabled+0x35/0x1f0 [ 23.534067] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 23.539502] kmalloc_order+0x1e/0x50 [ 23.543213] kmalloc_order_trace+0x17/0x160 [ 23.547529] input_mt_init_slots+0xca/0x3f0 [ 23.551836] uinput_ioctl_handler.isra.0+0x13df/0x1850 [ 23.557094] ? uinput_request_submit.part.0+0x280/0x280 [ 23.562439] ? debug_check_no_obj_freed+0x2a9/0x5c0 [ 23.567443] ? debug_check_no_obj_freed+0x148/0x5c0 [ 23.572455] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 23.577557] ? trace_hardirqs_on_caller+0x37b/0x540 [ 23.582568] ? uinput_compat_ioctl+0x90/0x90 [ 23.586959] do_vfs_ioctl+0xabe/0x1040 [ 23.590833] ? selinux_file_ioctl+0x426/0x590 [ 23.595304] ? selinux_file_ioctl+0x116/0x590 [ 23.599778] ? ioctl_preallocate+0x1e0/0x1e0 [ 23.604175] ? selinux_socket_sock_rcv_skb+0x610/0x610 [ 23.609436] ? rcu_read_lock_sched_held+0x10a/0x130 [ 23.614441] ? putname+0xcd/0x110 [ 23.617876] ? do_sys_open+0x255/0x590 [ 23.621745] ? filp_open+0x60/0x60 [ 23.625277] ? security_file_ioctl+0x7c/0xb0 [ 23.629665] SyS_ioctl+0x7f/0xb0 [ 23.633026] ? do_vfs_ioctl+0x1040/0x1040 [ 23.637155] do_syscall_64+0x19b/0x520 [ 23.641028] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 23.646195] RIP: 0033:0x4402b9 [ 23.649369] RSP: 002b:00007fffc28582e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 23.657073] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 23.664335] RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000003 [ 23.671585] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 23.678835] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401b40 [ 23.686085] R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000 [ 23.694066] Kernel Offset: 0x35800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 23.705004] Rebooting in 86400 seconds..