[....] 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: [ 24.299511] random: sshd: uninitialized urandom read (32 bytes read) [ 24.776228] audit: type=1400 audit(1544109999.058:6): avc: denied { map } for pid=1768 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 [ 24.832041] random: sshd: uninitialized urandom read (32 bytes read) [ 25.274456] random: sshd: uninitialized urandom read (32 bytes read) [ 25.432687] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.1' (ECDSA) to the list of known hosts. [ 31.034892] random: sshd: uninitialized urandom read (32 bytes read) [ 31.131829] audit: type=1400 audit(1544110005.418:7): avc: denied { map } for pid=1780 comm="syz-executor274" path="/root/syz-executor274736573" 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 [ 31.142605] uinput: invalid abs[2f] min:5 max:-9 [ 31.142661] ------------[ cut here ]------------ [ 31.142677] WARNING: CPU: 0 PID: 1780 at mm/page_alloc.c:4188 __alloc_pages_nodemask+0x3de/0x2280 [ 31.142682] Kernel panic - not syncing: panic_on_warn set ... [ 31.142682] [ 31.142689] CPU: 0 PID: 1780 Comm: syz-executor274 Not tainted 4.14.86+ #17 [ 31.142692] Call Trace: [ 31.142704] dump_stack+0xb9/0x11b [ 31.142714] ? __alloc_pages_nodemask+0x330/0x2280 [ 31.142722] panic+0x1bf/0x3a4 [ 31.142731] ? add_taint.cold.4+0x16/0x16 [ 31.142743] ? __probe_kernel_read+0x163/0x1c0 [ 31.142758] ? __alloc_pages_nodemask+0x3de/0x2280 [ 31.142766] __warn.cold.7+0x2f/0x35 [ 31.142774] ? __alloc_pages_nodemask+0x3de/0x2280 [ 31.142784] report_bug+0x1f7/0x26c [ 31.142798] do_error_trap+0x1ba/0x2c0 [ 31.142807] ? math_error+0x2d0/0x2d0 [ 31.142817] ? unwind_next_frame+0xea9/0x1930 [ 31.142833] ? __lock_acquire+0x619/0x4320 [ 31.142843] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.142871] invalid_op+0x18/0x40 [ 31.142879] RIP: 0010:__alloc_pages_nodemask+0x3de/0x2280 [ 31.142883] RSP: 0018:ffff8881d0bff8d0 EFLAGS: 00010246 [ 31.142890] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff1103a17ff2e [ 31.142894] RDX: 0000000000000000 RSI: 000000000000001a RDI: 0000000000000000 [ 31.142899] RBP: 0000000000000000 R08: ffff8881d2849780 R09: ffffffff9bccf010 [ 31.142903] R10: ffff8881d0bffba8 R11: 0000000000000001 R12: 000000000140c0c0 [ 31.142907] R13: 000000000000001a R14: ffff8881d016d528 R15: ffff8881c5546488 [ 31.142935] ? quarantine_put+0xd5/0x180 [ 31.142953] ? trace_hardirqs_on+0x10/0x10 [ 31.142964] ? gfp_pfmemalloc_allowed+0x150/0x150 [ 31.142971] ? lock_acquire+0x10f/0x380 [ 31.142980] ? uinput_ioctl_handler.isra.4+0xa0/0x1850 [ 31.142997] ? __mutex_lock+0x6f4/0x1480 [ 31.143013] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 31.143022] ? lock_downgrade+0x560/0x560 [ 31.143028] ? lock_acquire+0x10f/0x380 [ 31.143038] ? avc_has_extended_perms+0xd8/0xd50 [ 31.143049] ? check_preemption_disabled+0x34/0x1e0 [ 31.143063] kmalloc_order+0x1f/0x60 [ 31.143073] kmalloc_order_trace+0x18/0x160 [ 31.143086] input_mt_init_slots+0xc7/0x3f0 [ 31.143100] uinput_ioctl_handler.isra.4+0x14fd/0x1850 [ 31.143110] ? uinput_request_submit.part.3+0x280/0x280 [ 31.143117] ? uinput_write+0x88/0xce0 [ 31.143131] ? uinput_ioctl+0x50/0x50 [ 31.143137] ? lock_acquire+0x10f/0x380 [ 31.143145] ? debug_check_no_obj_freed+0x150/0x77c [ 31.143155] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 31.143175] ? uinput_compat_ioctl+0x80/0x80 [ 31.143187] do_vfs_ioctl+0x1a0/0x1030 [ 31.143200] ? ioctl_preallocate+0x1d0/0x1d0 [ 31.143208] ? avc_policy_seqno+0x5/0x10 [ 31.143215] ? selinux_file_permission+0x79/0x440 [ 31.143225] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 31.143244] ? vfs_write+0x318/0x4d0 [ 31.143261] ? security_file_ioctl+0x7c/0xb0 [ 31.143274] SyS_ioctl+0x7e/0xb0 [ 31.143282] ? do_vfs_ioctl+0x1030/0x1030 [ 31.143290] do_syscall_64+0x19b/0x4b0 [ 31.143305] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 31.143310] RIP: 0033:0x441869 [ 31.143314] RSP: 002b:00007ffd39bea888 EFLAGS: 00000286 ORIG_RAX: 0000000000000010 [ 31.143322] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441869 [ 31.143326] RDX: 0000000000441869 RSI: 0000000000005501 RDI: 0000000000000003 [ 31.143330] RBP: 00000000006cc018 R08: 00000000004002c8 R09: 00000000004002c8 [ 31.143335] R10: 00000000004002c8 R11: 0000000000000286 R12: 00000000004030f0 [ 31.143338] R13: 0000000000403180 R14: 0000000000000000 R15: 0000000000000000 [ 31.158415] Kernel Offset: 0x17800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 31.506762] Rebooting in 86400 seconds..