Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 9.633068] random: sshd: uninitialized urandom read (32 bytes read) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.110651] random: sshd: uninitialized urandom read (32 bytes read) [ 18.129028] random: crng init done Warning: Permanently added '10.128.10.48' (ECDSA) to the list of known hosts. executing program [ 27.113348] ------------[ cut here ]------------ [ 27.118246] WARNING: CPU: 1 PID: 2042 at mm/page_alloc.c:3556 __alloc_pages_nodemask+0x13a0/0x1bd0 [ 27.127364] Kernel panic - not syncing: panic_on_warn set ... [ 27.127364] [ 27.134738] CPU: 1 PID: 2042 Comm: syz-executor352 Not tainted 4.9.125+ #37 [ 27.141819] ffff8801ce9276f8 ffffffff81af0ae9 ffffffff82838ba0 00000000ffffffff [ 27.149823] 0000000000000000 0000000000000001 0000000000000de4 ffff8801ce9277b8 [ 27.157915] ffffffff813df095 0000000041b58ab3 ffffffff82c28773 ffffffff813deed6 [ 27.165917] Call Trace: [ 27.168489] [] dump_stack+0xc1/0x128 [ 27.173944] [] panic+0x1bf/0x39f [ 27.178946] [] ? add_taint.cold.6+0x16/0x16 [ 27.184906] [] ? get_page_from_freelist+0x702/0x18e0 [ 27.191637] [] ? __warn.cold.9+0xa6/0x17f [ 27.197416] [] ? __alloc_pages_nodemask+0x13a0/0x1bd0 [ 27.204236] [] __warn.cold.9+0xc1/0x17f [ 27.209841] [] warn_slowpath_null+0x2c/0x40 [ 27.215792] [] __alloc_pages_nodemask+0x13a0/0x1bd0 [ 27.222441] [] ? trace_hardirqs_on+0x10/0x10 [ 27.228477] [] ? trace_hardirqs_on+0x10/0x10 [ 27.234512] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 27.241330] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 27.247976] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 27.254707] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 27.261446] [] ? update_stack_state.constprop.2+0x7c/0x170 [ 27.268703] [] kmalloc_order+0x2a/0x70 [ 27.274219] [] kmalloc_order_trace+0x1f/0x190 [ 27.280344] [] __kmalloc+0x1ae/0x310 [ 27.285687] [] ? __lock_acquire+0x654/0x4a10 [ 27.291726] [] vga_arb_write+0xd8/0xcc0 [ 27.297343] [] ? kasan_slab_free+0x119/0x190 [ 27.303389] [] ? vga_str_to_iostate.isra.3+0x130/0x130 [ 27.310298] [] ? trace_hardirqs_on+0x10/0x10 [ 27.316333] [] ? trace_hardirqs_on+0x10/0x10 [ 27.322367] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 27.329279] [] __vfs_write+0x115/0x580 [ 27.334799] [] ? vga_str_to_iostate.isra.3+0x130/0x130 [ 27.341702] [] ? __vfs_read+0x560/0x560 [ 27.347306] [] ? __might_sleep+0x95/0x1a0 [ 27.353096] [] ? __inode_security_revalidate+0xd9/0x130 [ 27.360092] [] ? avc_policy_seqno+0x9/0x20 [ 27.365957] [] ? selinux_file_permission+0x82/0x470 [ 27.372603] [] ? security_file_permission+0x8f/0x1e0 [ 27.379431] [] ? rw_verify_area+0xe5/0x2a0 [ 27.385301] [] vfs_write+0x187/0x520 [ 27.390646] [] SyS_write+0xd9/0x1c0 [ 27.396005] [] ? SyS_read+0x1c0/0x1c0 [ 27.401441] [] ? do_syscall_64+0x48/0x480 [ 27.407221] [] ? SyS_read+0x1c0/0x1c0 [ 27.412653] [] do_syscall_64+0x19f/0x480 [ 27.418348] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 27.425605] Dumping ftrace buffer: [ 27.429188] (ftrace buffer empty) [ 27.432881] Kernel Offset: disabled [ 27.436494] Rebooting in 86400 seconds..