[....] Starting enhanced syslogd: rsyslogd[ 14.839025] audit: type=1400 audit(1572541075.406:4): 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 '10.128.0.126' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.707114] ------------[ cut here ]------------ [ 25.711947] WARNING: CPU: 0 PID: 2068 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x11d7/0x14b0() [ 25.721368] Kernel panic - not syncing: panic_on_warn set ... [ 25.721368] [ 25.728742] CPU: 0 PID: 2068 Comm: syz-executor824 Not tainted 4.4.174+ #4 [ 25.735732] 0000000000000000 26fc4887302ab1a3 ffff8800b9cbf218 ffffffff81aad1a1 [ 25.743859] 0000000000000000 ffffffff82835ee0 ffffffff82885260 0000000000000bfd [ 25.751897] ffffffff813d12d7 ffff8800b9cbf2f8 ffffffff813a48c2 0000000041b58ab3 [ 25.759913] Call Trace: [ 25.762479] [] dump_stack+0xc1/0x120 [ 25.767847] [] ? __alloc_pages_nodemask+0x11d7/0x14b0 [ 25.774698] [] panic+0x1b9/0x37b [ 25.779703] [] ? add_taint.cold+0x16/0x16 [ 25.785491] [] ? warn_slowpath_common.cold+0x5/0x20 [ 25.792746] [] warn_slowpath_common.cold+0x20/0x20 [ 25.799303] [] warn_slowpath_null+0x2a/0x30 [ 25.805249] [] __alloc_pages_nodemask+0x11d7/0x14b0 [ 25.811904] [] ? kasan_kmalloc.part.0+0xc6/0xf0 [ 25.818211] [] ? save_stack_trace+0x26/0x50 [ 25.824169] [] ? kasan_kmalloc.part.0+0x62/0xf0 [ 25.830470] [] ? kasan_kmalloc+0xb7/0xd0 [ 25.836157] [] ? policydb_read+0xc3b/0x2280 [ 25.842104] [] ? security_load_policy+0x23c/0x9c0 [ 25.848570] [] ? sel_write_load+0x175/0xf90 [ 25.854529] [] ? vfs_write+0x182/0x4e0 [ 25.860045] [] ? __alloc_pages_direct_compact+0x220/0x220 [ 25.867219] [] ? trace_hardirqs_on_caller+0x300/0x5a0 [ 25.874035] [] ? trace_hardirqs_on+0xd/0x10 [ 25.879983] [] ? policydb_read+0x7dd/0x2280 [ 25.885928] [] ? kasan_slab_free+0xb0/0x190 [ 25.891883] [] ? kfree+0xf4/0x310 [ 25.896969] [] ? policydb_read+0x7dd/0x2280 [ 25.902917] [] ? security_load_policy+0x23c/0x9c0 [ 25.909386] [] ? sel_write_load+0x175/0xf90 [ 25.915341] [] ? __vfs_write+0x116/0x3d0 [ 25.921115] [] ? vfs_write+0x182/0x4e0 [ 25.926627] [] ? SyS_write+0xdc/0x1c0 [ 25.932078] [] alloc_kmem_pages+0x12/0x20 [ 25.937874] [] kmalloc_order+0x21/0x70 [ 25.943416] [] kmalloc_order_trace+0x1f/0x1a0 [ 25.949552] [] __kmalloc+0x1c2/0x330 [ 25.954892] [] str_read+0x2b/0x130 [ 25.960057] [] user_read+0x240/0x3f0 [ 25.965397] [] ? mls_read_range_helper+0x380/0x380 [ 25.971951] [] ? policydb_read+0x7dd/0x2280 [ 25.977930] [] policydb_read+0xc3b/0x2280 [ 25.977944] [] ? mark_held_locks+0xb1/0x100 [ 25.977953] [] ? get_page_from_freelist+0x9d8/0x1d00 [ 25.977960] [] ? mls_read_range_helper+0x380/0x380 [ 25.977967] [] ? string_to_av_perm+0x90/0x90 [ 25.977975] [] ? security_load_policy+0x103/0x9c0 [ 25.977982] [] ? check_preemption_disabled+0x3c/0x200 [ 25.977988] [] ? check_preemption_disabled+0x3c/0x200 [ 25.977997] [] ? kasan_kmalloc+0xb7/0xd0 [ 25.978004] [] ? kmem_cache_alloc_trace+0x123/0x2d0 [ 25.978011] [] security_load_policy+0x23c/0x9c0 [ 25.978019] [] ? native_set_pgd+0x50/0x50 [ 25.978026] [] ? security_get_bools+0x610/0x610 [ 25.978034] [] ? vmap_page_range_noflush+0x517/0x780 [ 25.978041] [] ? alloc_vmap_area.isra.0+0x810/0x810 [ 25.978054] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 25.978061] [] ? check_stack_object+0x114/0x160 [ 25.978068] [] ? __check_object_size+0x222/0x332 [ 25.978075] [] sel_write_load+0x175/0xf90 [ 25.978082] [] ? debug_check_no_obj_freed+0x159/0x6e0 [ 25.978088] [] ? sel_read_bool+0x240/0x240 [ 25.978094] [] ? trace_hardirqs_on+0x10/0x10 [ 25.978100] [] ? debug_check_no_obj_freed+0x2b9/0x6e0 [ 25.978107] [] __vfs_write+0x116/0x3d0 [ 25.978113] [] ? sel_read_bool+0x240/0x240 [ 25.978119] [] ? __vfs_read+0x3c0/0x3c0 [ 25.978125] [] ? check_preemption_disabled+0x3c/0x200 [ 25.978131] [] ? check_preemption_disabled+0x3c/0x200 [ 25.978138] [] ? rcu_read_lock_sched_held+0x10b/0x130 [ 25.978144] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 25.978152] [] ? __sb_start_write+0x14f/0x310 [ 25.978158] [] vfs_write+0x182/0x4e0 [ 25.978164] [] SyS_write+0xdc/0x1c0 [ 25.978170] [] ? SyS_read+0x1c0/0x1c0 [ 25.978180] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 25.978189] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 25.984225] Kernel Offset: disabled [ 26.208350] Rebooting in 86400 seconds..