[....] Starting enhanced syslogd: rsyslogd[ 13.223442] audit: type=1400 audit(1572608916.180:4): 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 '10.128.1.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 30.650034] ------------[ cut here ]------------ [ 30.654959] WARNING: CPU: 1 PID: 2073 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x11d7/0x14b0() [ 30.664760] Kernel panic - not syncing: panic_on_warn set ... [ 30.664760] [ 30.672166] CPU: 1 PID: 2073 Comm: syz-executor706 Not tainted 4.4.174+ #17 [ 30.679245] 0000000000000000 06e2db5d8575e4d6 ffff8801d40d71b8 ffffffff81aad1a1 [ 30.687288] 0000000000000000 ffffffff82835ee0 ffffffff82885260 0000000000000bfd [ 30.695308] ffffffff813d12d7 ffff8801d40d7298 ffffffff813a48c2 0000000041b58ab3 [ 30.703393] Call Trace: [ 30.705961] [] dump_stack+0xc1/0x120 [ 30.711356] [] ? __alloc_pages_nodemask+0x11d7/0x14b0 [ 30.718176] [] panic+0x1b9/0x37b [ 30.723172] [] ? add_taint.cold+0x16/0x16 [ 30.728964] [] ? warn_slowpath_common.cold+0x5/0x20 [ 30.735632] [] warn_slowpath_common.cold+0x20/0x20 [ 30.742294] [] warn_slowpath_null+0x2a/0x30 [ 30.748244] [] __alloc_pages_nodemask+0x11d7/0x14b0 [ 30.754996] [] ? save_stack_trace+0x26/0x50 [ 30.760945] [] ? kasan_kmalloc.part.0+0x62/0xf0 [ 30.767241] [] ? kasan_kmalloc+0xb7/0xd0 [ 30.772979] [] ? __kmalloc+0x141/0x330 [ 30.778495] [] ? hashtab_create+0x11d/0x210 [ 30.784447] [] ? symtab_init+0x2c/0xb0 [ 30.789973] [] ? common_read+0x1be/0x380 [ 30.795676] [] ? policydb_read+0xc3b/0x2280 [ 30.801629] [] ? security_load_policy+0x23c/0x9c0 [ 30.808175] [] ? sel_write_load+0x175/0xf90 [ 30.814222] [] ? __vfs_write+0x116/0x3d0 [ 30.820058] [] ? vfs_write+0x182/0x4e0 [ 30.825592] [] ? SyS_write+0xdc/0x1c0 [ 30.831028] [] ? do_fast_syscall_32+0x32d/0xa90 [ 30.837331] [] ? sysenter_flags_fixed+0xd/0x1a [ 30.843821] [] ? policydb_read+0xc3b/0x2280 [ 30.849773] [] ? security_load_policy+0x23c/0x9c0 [ 30.856695] [] ? sel_write_load+0x175/0xf90 [ 30.862652] [] ? vfs_write+0x182/0x4e0 [ 30.868207] [] ? __alloc_pages_direct_compact+0x220/0x220 [ 30.875382] [] ? trace_hardirqs_on_caller+0x500/0x5a0 [ 30.882216] [] ? policydb_read+0x7dd/0x2280 [ 30.888255] [] ? kasan_slab_free+0x11a/0x190 [ 30.894293] [] ? check_preemption_disabled+0x3c/0x200 [ 30.901111] [] alloc_kmem_pages+0x12/0x20 [ 30.906901] [] kmalloc_order+0x21/0x70 [ 30.912765] [] kmalloc_order_trace+0x1f/0x1a0 [ 30.918905] [] __kmalloc+0x1c2/0x330 [ 30.924243] [] ? symcmp+0x30/0x30 [ 30.929335] [] str_read+0x2b/0x130 [ 30.934501] [] common_read+0x260/0x380 [ 30.940013] [] ? class_read+0x950/0x950 [ 30.945627] [] ? policydb_read+0x7dd/0x2280 [ 30.951582] [] ? kfree+0xf4/0x310 [ 30.956675] [] policydb_read+0xc3b/0x2280 [ 30.962460] [] ? mark_held_locks+0xb1/0x100 [ 30.968410] [] ? get_page_from_freelist+0x9d8/0x1d00 [ 30.975138] [] ? class_read+0x950/0x950 [ 30.981259] [] ? string_to_av_perm+0x90/0x90 [ 30.987310] [] ? security_load_policy+0x103/0x9c0 [ 30.993790] [] ? check_preemption_disabled+0x3c/0x200 [ 31.000607] [] ? check_preemption_disabled+0x3c/0x200 [ 31.007426] [] ? kasan_unpoison_shadow+0x35/0x50 [ 31.013807] [] ? kasan_kmalloc+0xb7/0xd0 [ 31.019496] [] ? kmem_cache_alloc_trace+0x123/0x2d0 [ 31.026142] [] security_load_policy+0x23c/0x9c0 [ 31.032438] [] ? native_set_pgd+0x50/0x50 [ 31.038212] [] ? security_get_bools+0x610/0x610 [ 31.044509] [] ? vmap_page_range_noflush+0x517/0x780 [ 31.051254] [] ? trace_hardirqs_on+0x10/0x10 [ 31.057292] [] ? alloc_vmap_area.isra.0+0x810/0x810 [ 31.063941] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 31.070685] [] ? check_stack_object+0x114/0x160 [ 31.076997] [] ? __check_object_size+0x222/0x332 [ 31.083383] [] sel_write_load+0x175/0xf90 [ 31.089156] [] ? sel_read_bool+0x240/0x240 [ 31.095017] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 31.101921] [] ? trace_hardirqs_on+0x10/0x10 [ 31.107958] [] __vfs_write+0x116/0x3d0 [ 31.114267] [] ? sel_read_bool+0x240/0x240 [ 31.120126] [] ? __vfs_read+0x3c0/0x3c0 [ 31.125740] [] ? check_preemption_disabled+0x3c/0x200 [ 31.132556] [] ? check_preemption_disabled+0x3c/0x200 [ 31.139375] [] ? rcu_read_lock_sched_held+0x10b/0x130 [ 31.146193] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 31.152750] [] ? __sb_start_write+0x14f/0x310 [ 31.158877] [] vfs_write+0x182/0x4e0 [ 31.164217] [] SyS_write+0xdc/0x1c0 [ 31.169470] [] ? SyS_read+0x1c0/0x1c0 [ 31.174899] [] ? __do_page_fault+0x2b3/0x7f0 [ 31.181647] [] ? do_fast_syscall_32+0xd6/0xa90 [ 31.187987] [] ? SyS_read+0x1c0/0x1c0 [ 31.193417] [] do_fast_syscall_32+0x32d/0xa90 [ 31.199552] [] sysenter_flags_fixed+0xd/0x1a [ 31.207548] Kernel Offset: disabled [ 31.211198] Rebooting in 86400 seconds..