[....] Starting enhanced syslogd: rsyslogd[ 15.995871] audit: type=1400 audit(1552993850.790:4): avc: denied { syslog } for pid=1933 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.152' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.215853] ------------[ cut here ]------------ [ 34.220695] WARNING: CPU: 1 PID: 2085 at arch/x86/mm/pat.c:1017 untrack_pfn+0x214/0x270() [ 34.229171] Kernel panic - not syncing: panic_on_warn set ... [ 34.229171] [ 34.236639] CPU: 1 PID: 2085 Comm: syz-executor338 Not tainted 4.4.174+ #4 [ 34.243634] 0000000000000000 2349228cc06b04e7 ffff8800b6a6f7b8 ffffffff81aad1a1 [ 34.251654] 0000000000000000 ffffffff82835ee0 ffffffff82831440 00000000000003f9 [ 34.259768] ffffffff810b6b24 ffff8800b6a6f898 ffffffff813a48c2 0000000041b58ab3 [ 34.267767] Call Trace: [ 34.270344] [] dump_stack+0xc1/0x120 [ 34.275695] [] ? untrack_pfn+0x214/0x270 [ 34.281662] [] panic+0x1b9/0x37b [ 34.286664] [] ? add_taint.cold+0x16/0x16 [ 34.292583] [] ? follow_phys+0x1f9/0x2e0 [ 34.298291] [] ? warn_slowpath_common.cold+0x5/0x20 [ 34.305084] [] warn_slowpath_common.cold+0x20/0x20 [ 34.311770] [] warn_slowpath_null+0x2a/0x30 [ 34.317736] [] untrack_pfn+0x214/0x270 [ 34.323261] [] ? track_pfn_insert+0x100/0x100 [ 34.329398] [] ? depot_save_stack+0x1c3/0x5f0 [ 34.335608] [] unmap_single_vma+0xe2e/0x1090 [ 34.341663] [] ? trace_hardirqs_on+0x10/0x10 [ 34.347756] [] ? vm_normal_page+0x300/0x300 [ 34.353814] [] ? lru_add_drain_cpu+0x165/0x390 [ 34.360033] [] ? trace_hardirqs_on+0x10/0x10 [ 34.366083] [] ? lru_cache_add_active_or_unevictable+0x120/0x120 [ 34.373861] [] unmap_vmas+0x48/0xa0 [ 34.379114] [] unmap_region+0x1a9/0x320 [ 34.384714] [] ? validate_mm_rb+0xb0/0xb0 [ 34.390498] [] ? vma_compute_subtree_gap+0x1f0/0x1f0 [ 34.397237] [] ? vma_rb_erase+0x429/0xa30 [ 34.403023] [] ? vma_compute_subtree_gap+0x190/0x1f0 [ 34.409765] [] do_munmap+0x4ca/0xcf0 [ 34.415106] [] move_vma+0x50e/0x920 [ 34.420360] [] ? move_page_tables+0xcc0/0xcc0 [ 34.426489] [] ? vmacache_update+0x101/0x130 [ 34.432594] [] ? selinux_mmap_addr+0x20/0xf0 [ 34.438649] [] ? security_mmap_addr+0x7f/0xb0 [ 34.444828] [] ? get_unmapped_area+0x238/0x310 [ 34.451059] [] SyS_mremap+0x9dd/0xd60 [ 34.456494] [] ? move_vma+0x920/0x920 [ 34.462032] [] ? fput+0x22/0x160 [ 34.467133] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 34.473753] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 34.480779] Kernel Offset: disabled [ 34.484444] Rebooting in 86400 seconds..