[....] Starting enhanced syslogd: rsyslogd[ 14.792784] audit: type=1400 audit(1563524172.840:4): avc: denied { syslog } for pid=1925 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 '10.128.1.46' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 58.331984] ------------[ cut here ]------------ [ 58.336869] WARNING: CPU: 0 PID: 2095 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x11d7/0x14b0() [ 58.346247] Kernel panic - not syncing: panic_on_warn set ... [ 58.346247] [ 58.353590] CPU: 0 PID: 2095 Comm: syz-executor848 Not tainted 4.4.174+ #4 [ 58.360581] 0000000000000000 6f221e9f1ae0e2e9 ffff8801d38ff1e0 ffffffff81aad1a1 [ 58.368629] 0000000000000000 ffffffff82835ee0 ffffffff82885260 0000000000000bfd [ 58.376613] ffffffff813d12d7 ffff8801d38ff2c0 ffffffff813a48c2 0000000041b58ab3 [ 58.385856] Call Trace: [ 58.388420] [] dump_stack+0xc1/0x120 [ 58.393756] [] ? __alloc_pages_nodemask+0x11d7/0x14b0 [ 58.400570] [] panic+0x1b9/0x37b [ 58.405567] [] ? add_taint.cold+0x16/0x16 [ 58.411391] [] ? warn_slowpath_common.cold+0x5/0x20 [ 58.418037] [] warn_slowpath_common.cold+0x20/0x20 [ 58.424590] [] warn_slowpath_null+0x2a/0x30 [ 58.430539] [] __alloc_pages_nodemask+0x11d7/0x14b0 [ 58.437205] [] ? save_stack_trace+0x26/0x50 [ 58.443149] [] ? kasan_kmalloc.part.0+0x62/0xf0 [ 58.449503] [] ? kasan_kmalloc+0xb7/0xd0 [ 58.455192] [] ? __kmalloc+0x141/0x330 [ 58.460700] [] ? hashtab_create+0x11d/0x210 [ 58.466644] [] ? symtab_init+0x2c/0xb0 [ 58.472154] [] ? class_read+0x1fd/0x950 [ 58.477785] [] ? policydb_read+0xc3b/0x2280 [ 58.483741] [] ? security_load_policy+0x23c/0x9c0 [ 58.490208] [] ? sel_write_load+0x175/0xf90 [ 58.496151] [] ? __vfs_write+0x116/0x3d0 [ 58.501920] [] ? vfs_write+0x182/0x4e0 [ 58.507429] [] ? SyS_write+0xdc/0x1c0 [ 58.512861] [] ? entry_SYSCALL_64_fastpath+0x1e/0x9a [ 58.519594] [] ? policydb_read+0xc3b/0x2280 [ 58.525543] [] ? security_load_policy+0x23c/0x9c0 [ 58.532064] [] ? sel_write_load+0x175/0xf90 [ 58.538015] [] ? vfs_write+0x182/0x4e0 [ 58.543525] [] ? __alloc_pages_direct_compact+0x220/0x220 [ 58.550693] [] ? mark_held_locks+0xb1/0x100 [ 58.556638] [] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 58.563450] [] ? trace_hardirqs_on+0xd/0x10 [ 58.569392] [] ? hashtab_create+0x11d/0x210 [ 58.575334] [] ? mark_held_locks+0xb1/0x100 [ 58.581274] [] ? check_preemption_disabled+0x3c/0x200 [ 58.588084] [] alloc_kmem_pages+0x12/0x20 [ 58.593927] [] kmalloc_order+0x21/0x70 [ 58.599487] [] kmalloc_order_trace+0x1f/0x1a0 [ 58.605612] [] __kmalloc+0x1c2/0x330 [ 58.611021] [] ? symcmp+0x30/0x30 [ 58.616111] [] str_read+0x2b/0x130 [ 58.621382] [] class_read+0x2c0/0x950 [ 58.626807] [] ? perm_read.isra.0+0x2c0/0x2c0 [ 58.632927] [] ? debug_object_active_state+0x380/0x380 [ 58.639834] [] policydb_read+0xc3b/0x2280 [ 58.645613] [] ? mark_held_locks+0xb1/0x100 [ 58.651569] [] ? get_page_from_freelist+0x9d8/0x1d00 [ 58.658295] [] ? perm_read.isra.0+0x2c0/0x2c0 [ 58.664411] [] ? string_to_av_perm+0x90/0x90 [ 58.670442] [] ? security_load_policy+0x103/0x9c0 [ 58.676908] [] ? check_preemption_disabled+0x3c/0x200 [ 58.683764] [] ? check_preemption_disabled+0x3c/0x200 [ 58.690584] [] ? kasan_kmalloc+0xb7/0xd0 [ 58.696307] [] ? kmem_cache_alloc_trace+0x123/0x2d0 [ 58.702951] [] security_load_policy+0x23c/0x9c0 [ 58.709244] [] ? native_set_pgd+0x50/0x50 [ 58.715017] [] ? security_get_bools+0x610/0x610 [ 58.721306] [] ? vmap_page_range_noflush+0x517/0x780 [ 58.728036] [] ? alloc_vmap_area.isra.0+0x810/0x810 [ 58.734683] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 58.741413] [] ? check_stack_object+0x114/0x160 [ 58.747703] [] ? __check_object_size+0x222/0x332 [ 58.754080] [] sel_write_load+0x175/0xf90 [ 58.759856] [] ? debug_check_no_obj_freed+0x159/0x6e0 [ 58.766676] [] ? sel_read_bool+0x240/0x240 [ 58.772547] [] ? trace_hardirqs_on+0x10/0x10 [ 58.778586] [] ? debug_check_no_obj_freed+0x2b9/0x6e0 [ 58.785398] [] __vfs_write+0x116/0x3d0 [ 58.790912] [] ? sel_read_bool+0x240/0x240 [ 58.796842] [] ? __vfs_read+0x3c0/0x3c0 [ 58.802557] [] ? check_preemption_disabled+0x3c/0x200 [ 58.809370] [] ? check_preemption_disabled+0x3c/0x200 [ 58.816184] [] ? rcu_read_lock_sched_held+0x10b/0x130 [ 58.823079] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 58.829748] [] ? __sb_start_write+0x14f/0x310 [ 58.835930] [] vfs_write+0x182/0x4e0 [ 58.841274] [] SyS_write+0xdc/0x1c0 [ 58.846527] [] ? SyS_read+0x1c0/0x1c0 [ 58.851955] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 58.858500] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 58.865117] Kernel Offset: disabled [ 58.868755] Rebooting in 86400 seconds..