[....] Starting enhanced syslogd: rsyslogd[ 10.286546] audit: type=1400 audit(1514429751.132:4): avc: denied { syslog } for pid=3170 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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 '10.128.15.200' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.450131] kasan: CONFIG_KASAN_INLINE enabled [ 19.450909] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.451902] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.452759] Dumping ftrace buffer: [ 19.453248] (ftrace buffer empty) [ 19.453743] Modules linked in: [ 19.454211] CPU: 0 PID: 3318 Comm: syzkaller646554 Not tainted 4.9.72-gcb7518e #10 [ 19.455262] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.456481] task: ffff8801c9ab0000 task.stack: ffff8801c9610000 [ 19.457276] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 19.458378] RSP: 0018:ffff8801c9617a50 EFLAGS: 00010a07 [ 19.459097] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 19.460075] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 19.461024] RBP: ffff8801c9617a60 R08: 0000000000000001 R09: 0000000000000000 [ 19.461988] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 19.462940] R13: 0000000000000020 R14: ffff8801c8828000 R15: dffffc0000000000 [ 19.463891] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000976f840 [ 19.465016] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.465832] CR2: 0000000020001000 CR3: 00000001cad73000 CR4: 00000000001406f0 [ 19.466801] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.467751] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.468715] Stack: [ 19.469010] ffff8801c9ab0000 ffff8801c8828158 ffff8801c9617ac0 ffffffff82664fc1 [ 19.470143] ffff8801c8828170 ffffed003910502b ffffed003910502e ffff8801c8828168 [ 19.475587] dead4ead00000000 ffff8801c8828140 0000000000000000 0000000000000000 [ 19.483530] Call Trace: [ 19.486082] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 19.492543] [] sg_finish_rem_req+0x2b5/0x340 [ 19.498566] [] sg_new_read.isra.20+0x39/0x3e0 [ 19.504696] [] ? sg_get_rq_mark+0x142/0x190 [ 19.510632] [] sg_read+0x8bd/0x1440 [ 19.515885] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.522547] [] ? lru_cache_add+0xd9/0x1e0 [ 19.528326] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 19.535401] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.542031] [] __vfs_read+0x103/0x670 [ 19.547445] [] ? default_llseek+0x290/0x290 [ 19.553382] [] ? fsnotify+0x86/0xf30 [ 19.558709] [] ? fsnotify+0xf30/0xf30 [ 19.564126] [] ? avc_policy_seqno+0x9/0x20 [ 19.569977] [] ? selinux_file_permission+0x82/0x460 [ 19.576607] [] ? security_file_permission+0x89/0x1e0 [ 19.583324] [] ? rw_verify_area+0xe5/0x2b0 [ 19.589174] [] vfs_read+0x11e/0x380 [ 19.594415] [] SyS_read+0xd9/0x1b0 [ 19.599576] [] ? vfs_copy_file_range+0x740/0x740 [ 19.605962] [] ? do_fast_syscall_32+0xcf/0x890 [ 19.612165] [] ? vfs_copy_file_range+0x740/0x740 [ 19.618535] [] do_fast_syscall_32+0x2f7/0x890 [ 19.624643] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.631274] [] entry_SYSENTER_compat+0x51/0x60 [ 19.637467] Code: e9 27 fc ff ff 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d [ 19.663759] RIP [] __free_pages+0x21/0x80 [ 19.669637] RSP [ 19.673682] ---[ end trace 86712afffdf2b318 ]--- [ 19.678878] Kernel panic - not syncing: Fatal exception [ 19.684636] Dumping ftrace buffer: [ 19.688147] (ftrace buffer empty) [ 19.691825] Kernel Offset: disabled [ 19.695416] Rebooting in 86400 seconds..