[....] Starting enhanced syslogd: rsyslogd[ 14.724516] audit: type=1400 audit(1563664877.598:4): avc: denied { syslog } for pid=1919 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] 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 Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.559985] ------------[ cut here ]------------ [ 37.565031] WARNING: CPU: 0 PID: 2077 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x11d7/0x14b0() [ 37.574571] Kernel panic - not syncing: panic_on_warn set ... [ 37.574571] [ 37.582036] CPU: 0 PID: 2077 Comm: syz-executor033 Not tainted 4.4.174+ #4 [ 37.589238] 0000000000000000 ea3bd619698e8ed1 ffff8801cf217220 ffffffff81aad1a1 [ 37.597537] 0000000000000000 ffffffff82835ee0 ffffffff82885260 0000000000000bfd [ 37.605909] ffffffff813d12d7 ffff8801cf217300 ffffffff813a48c2 0000000041b58ab3 [ 37.613984] Call Trace: [ 37.616562] [] dump_stack+0xc1/0x120 [ 37.622018] [] ? __alloc_pages_nodemask+0x11d7/0x14b0 [ 37.628852] [] panic+0x1b9/0x37b [ 37.633906] [] ? add_taint.cold+0x16/0x16 [ 37.639698] [] ? warn_slowpath_common.cold+0x5/0x20 [ 37.646421] [] warn_slowpath_common.cold+0x20/0x20 [ 37.653241] [] warn_slowpath_null+0x2a/0x30 [ 37.659212] [] __alloc_pages_nodemask+0x11d7/0x14b0 [ 37.665986] [] ? kasan_kmalloc.part.0+0xc6/0xf0 [ 37.672389] [] ? save_stack_trace+0x26/0x50 [ 37.678568] [] ? kasan_kmalloc.part.0+0x62/0xf0 [ 37.684971] [] ? kasan_kmalloc+0xb7/0xd0 [ 37.690732] [] ? policydb_read+0xc3b/0x2280 [ 37.696695] [] ? security_load_policy+0x23c/0x9c0 [ 37.703174] [] ? sel_write_load+0x175/0xf90 [ 37.709137] [] ? vfs_write+0x182/0x4e0 [ 37.714694] [] ? __alloc_pages_direct_compact+0x220/0x220 [ 37.721924] [] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 37.728833] [] ? trace_hardirqs_on+0xd/0x10 [ 37.734797] [] ? policydb_read+0x7dd/0x2280 [ 37.740754] [] ? kasan_slab_free+0x11a/0x190 [ 37.746859] [] ? kfree+0xf4/0x310 [ 37.752088] [] ? policydb_read+0x7dd/0x2280 [ 37.758089] [] ? security_load_policy+0x23c/0x9c0 [ 37.764673] [] ? sel_write_load+0x175/0xf90 [ 37.770692] [] ? __vfs_write+0x116/0x3d0 [ 37.776397] [] ? vfs_write+0x182/0x4e0 [ 37.781923] [] ? SyS_write+0xdc/0x1c0 [ 37.787355] [] ? entry_SYSCALL_64_fastpath+0x1e/0x9a [ 37.794096] [] alloc_kmem_pages+0x12/0x20 [ 37.799887] [] kmalloc_order+0x21/0x70 [ 37.805416] [] kmalloc_order_trace+0x1f/0x1a0 [ 37.811593] [] __kmalloc+0x1c2/0x330 [ 37.816944] [] str_read+0x2b/0x130 [ 37.822183] [] type_read+0x223/0x410 [ 37.827556] [] ? sens_read+0x360/0x360 [ 37.833184] [] ? policydb_read+0x7dd/0x2280 [ 37.839264] [] policydb_read+0xc3b/0x2280 [ 37.845211] [] ? mark_held_locks+0xb1/0x100 [ 37.851213] [] ? get_page_from_freelist+0x9d8/0x1d00 [ 37.857986] [] ? sens_read+0x360/0x360 [ 37.863529] [] ? string_to_av_perm+0x90/0x90 [ 37.869574] [] ? security_load_policy+0x103/0x9c0 [ 37.876044] [] ? check_preemption_disabled+0x3c/0x200 [ 37.882873] [] ? check_preemption_disabled+0x3c/0x200 [ 37.889698] [] ? kasan_kmalloc+0xb7/0xd0 [ 37.895417] [] ? kmem_cache_alloc_trace+0x123/0x2d0 [ 37.902241] [] security_load_policy+0x23c/0x9c0 [ 37.908544] [] ? native_set_pgd+0x50/0x50 [ 37.914319] [] ? security_get_bools+0x610/0x610 [ 37.920760] [] ? vmap_page_range_noflush+0x517/0x780 [ 37.927502] [] ? alloc_vmap_area.isra.0+0x810/0x810 [ 37.934200] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 37.941046] [] ? check_stack_object+0x114/0x160 [ 37.947355] [] ? __check_object_size+0x222/0x332 [ 37.953758] [] sel_write_load+0x175/0xf90 [ 37.959634] [] ? debug_check_no_obj_freed+0x159/0x6e0 [ 37.966459] [] ? sel_read_bool+0x240/0x240 [ 37.972332] [] ? trace_hardirqs_on+0x10/0x10 [ 37.978380] [] ? debug_check_no_obj_freed+0x2b9/0x6e0 [ 37.985213] [] __vfs_write+0x116/0x3d0 [ 37.990746] [] ? sel_read_bool+0x240/0x240 [ 37.996613] [] ? __vfs_read+0x3c0/0x3c0 [ 38.002228] [] ? check_preemption_disabled+0x3c/0x200 [ 38.009055] [] ? check_preemption_disabled+0x3c/0x200 [ 38.015889] [] ? rcu_read_lock_sched_held+0x10b/0x130 [ 38.022724] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 38.029384] [] ? __sb_start_write+0x14f/0x310 [ 38.035659] [] vfs_write+0x182/0x4e0 [ 38.041067] [] SyS_write+0xdc/0x1c0 [ 38.046427] [] ? SyS_read+0x1c0/0x1c0 [ 38.051859] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 38.058331] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 38.065833] Kernel Offset: disabled [ 38.069500] Rebooting in 86400 seconds..