[....] Starting enhanced syslogd: rsyslogd[ 13.178217] audit: type=1400 audit(1565937504.071:4): avc: denied { syslog } for pid=1922 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 '10.128.0.212' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.173710] ------------[ cut here ]------------ [ 33.178640] WARNING: CPU: 1 PID: 2074 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x11d7/0x14b0() [ 33.188063] Kernel panic - not syncing: panic_on_warn set ... [ 33.188063] [ 33.195423] CPU: 1 PID: 2074 Comm: syz-executor940 Not tainted 4.4.174+ #17 [ 33.202511] 0000000000000000 605f4f7766c037f7 ffff8801d4aa71b8 ffffffff81aad1a1 [ 33.210511] 0000000000000000 ffffffff82835ee0 ffffffff82885260 0000000000000bfd [ 33.218666] ffffffff813d12d7 ffff8801d4aa7298 ffffffff813a48c2 0000000041b58ab3 [ 33.226674] Call Trace: [ 33.229246] [] dump_stack+0xc1/0x120 [ 33.234584] [] ? __alloc_pages_nodemask+0x11d7/0x14b0 [ 33.241408] [] panic+0x1b9/0x37b [ 33.246497] [] ? add_taint.cold+0x16/0x16 [ 33.252280] [] ? warn_slowpath_common.cold+0x5/0x20 [ 33.258937] [] warn_slowpath_common.cold+0x20/0x20 [ 33.265510] [] warn_slowpath_null+0x2a/0x30 [ 33.271464] [] __alloc_pages_nodemask+0x11d7/0x14b0 [ 33.285213] [] ? save_stack_trace+0x26/0x50 [ 33.291172] [] ? kasan_kmalloc.part.0+0x62/0xf0 [ 33.297478] [] ? kasan_kmalloc+0xb7/0xd0 [ 33.303178] [] ? __kmalloc+0x141/0x330 [ 33.308695] [] ? hashtab_create+0x11d/0x210 [ 33.314706] [] ? symtab_init+0x2c/0xb0 [ 33.320343] [] ? common_read+0x1be/0x380 [ 33.326043] [] ? policydb_read+0xc3b/0x2280 [ 33.332015] [] ? security_load_policy+0x23c/0x9c0 [ 33.338586] [] ? sel_write_load+0x175/0xf90 [ 33.344544] [] ? __vfs_write+0x116/0x3d0 [ 33.350292] [] ? vfs_write+0x182/0x4e0 [ 33.355825] [] ? SyS_write+0xdc/0x1c0 [ 33.361308] [] ? do_fast_syscall_32+0x32d/0xa90 [ 33.367618] [] ? sysenter_flags_fixed+0xd/0x1a [ 33.373845] [] ? policydb_read+0xc3b/0x2280 [ 33.379913] [] ? security_load_policy+0x23c/0x9c0 [ 33.386392] [] ? sel_write_load+0x175/0xf90 [ 33.392347] [] ? vfs_write+0x182/0x4e0 [ 33.397981] [] ? __alloc_pages_direct_compact+0x220/0x220 [ 33.405163] [] ? trace_hardirqs_on_caller+0x500/0x5a0 [ 33.412063] [] ? policydb_read+0x7dd/0x2280 [ 33.418023] [] ? kasan_slab_free+0x11a/0x190 [ 33.424078] [] ? check_preemption_disabled+0x3c/0x200 [ 33.430912] [] alloc_kmem_pages+0x12/0x20 [ 33.436695] [] kmalloc_order+0x21/0x70 [ 33.442230] [] kmalloc_order_trace+0x1f/0x1a0 [ 33.448469] [] __kmalloc+0x1c2/0x330 [ 33.453828] [] ? symcmp+0x30/0x30 [ 33.459016] [] str_read+0x2b/0x130 [ 33.464343] [] common_read+0x260/0x380 [ 33.470220] [] ? class_read+0x950/0x950 [ 33.476767] [] ? policydb_read+0x7dd/0x2280 [ 33.482718] [] ? kfree+0xf4/0x310 [ 33.487808] [] policydb_read+0xc3b/0x2280 [ 33.493589] [] ? mark_held_locks+0xb1/0x100 [ 33.499705] [] ? get_page_from_freelist+0x9d8/0x1d00 [ 33.506608] [] ? class_read+0x950/0x950 [ 33.512214] [] ? string_to_av_perm+0x90/0x90 [ 33.519081] [] ? security_load_policy+0x103/0x9c0 [ 33.525671] [] ? check_preemption_disabled+0x3c/0x200 [ 33.532494] [] ? check_preemption_disabled+0x3c/0x200 [ 33.539460] [] ? kasan_unpoison_shadow+0x35/0x50 [ 33.545899] [] ? kasan_kmalloc+0xb7/0xd0 [ 33.551599] [] ? kmem_cache_alloc_trace+0x123/0x2d0 [ 33.558297] [] security_load_policy+0x23c/0x9c0 [ 33.564614] [] ? native_set_pgd+0x50/0x50 [ 33.570402] [] ? security_get_bools+0x610/0x610 [ 33.576699] [] ? vmap_page_range_noflush+0x517/0x780 [ 33.583430] [] ? trace_hardirqs_on+0x10/0x10 [ 33.589540] [] ? alloc_vmap_area.isra.0+0x810/0x810 [ 33.596368] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 33.603998] [] ? check_stack_object+0x114/0x160 [ 33.613569] [] ? __check_object_size+0x222/0x332 [ 33.626027] [] sel_write_load+0x175/0xf90 [ 33.631967] [] ? sel_read_bool+0x240/0x240 [ 33.638832] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 33.645797] [] ? trace_hardirqs_on+0x10/0x10 [ 33.652122] [] __vfs_write+0x116/0x3d0 [ 33.658080] [] ? sel_read_bool+0x240/0x240 [ 33.663958] [] ? __vfs_read+0x3c0/0x3c0 [ 33.669678] [] ? check_preemption_disabled+0x3c/0x200 [ 33.676513] [] ? check_preemption_disabled+0x3c/0x200 [ 33.689828] [] ? rcu_read_lock_sched_held+0x10b/0x130 [ 33.699141] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 33.705945] [] ? __sb_start_write+0x14f/0x310 [ 33.712092] [] vfs_write+0x182/0x4e0 [ 33.717437] [] SyS_write+0xdc/0x1c0 [ 33.723040] [] ? SyS_read+0x1c0/0x1c0 [ 33.728532] [] ? __do_page_fault+0x2b3/0x7f0 [ 33.734590] [] ? do_fast_syscall_32+0xd6/0xa90 [ 33.741141] [] ? SyS_read+0x1c0/0x1c0 [ 33.746591] [] do_fast_syscall_32+0x32d/0xa90 [ 33.752733] [] sysenter_flags_fixed+0xd/0x1a [ 33.759196] Kernel Offset: disabled [ 33.762949] Rebooting in 86400 seconds..