[....] Starting enhanced syslogd: rsyslogd[ 12.723388] audit: type=1400 audit(1514419304.206:4): avc: denied { syslog } for pid=3163 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 '10.128.15.211' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.268509] kasan: CONFIG_KASAN_INLINE enabled [ 24.273110] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.280545] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 24.286755] Dumping ftrace buffer: [ 24.290263] (ftrace buffer empty) [ 24.293940] Modules linked in: [ 24.297215] CPU: 1 PID: 3323 Comm: syzkaller063345 Not tainted 4.9.72-gcb7518e #10 [ 24.304893] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.314223] task: ffff8801ca703000 task.stack: ffff8801c9090000 [ 24.320248] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 24.328489] RSP: 0018:ffff8801c9097a50 EFLAGS: 00010a07 [ 24.333902] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 24.341138] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 24.348386] RBP: ffff8801c9097a60 R08: 0000000000000001 R09: 0000000000000000 [ 24.355627] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 24.362871] R13: 0000000000000020 R14: ffff8801c9134200 R15: dffffc0000000000 [ 24.370115] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000008402840 [ 24.378310] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 24.384165] CR2: 0000000020001000 CR3: 00000001c9942000 CR4: 00000000001406e0 [ 24.391407] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.398652] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.405893] Stack: [ 24.408010] ffff8801ca703000 ffff8801c9134358 ffff8801c9097ac0 ffffffff82664fc1 [ 24.415958] ffff8801c9134370 ffffed003922686b ffffed003922686e ffff8801c9134368 [ 24.423916] dead4ead00000000 ffff8801c9134340 0000000000000000 0000000000000000 [ 24.431867] Call Trace: [ 24.434423] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 24.440889] [] sg_finish_rem_req+0x2b5/0x340 [ 24.446914] [] sg_new_read.isra.20+0x39/0x3e0 [ 24.453023] [] ? sg_get_rq_mark+0x142/0x190 [ 24.458968] [] sg_read+0x8bd/0x1440 [ 24.464216] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.470853] [] ? lru_cache_add+0xd9/0x1e0 [ 24.476627] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 24.483696] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.490331] [] __vfs_read+0x103/0x670 [ 24.495748] [] ? default_llseek+0x290/0x290 [ 24.501698] [] ? fsnotify+0x86/0xf30 [ 24.507029] [] ? fsnotify+0xf30/0xf30 [ 24.512462] [] ? avc_policy_seqno+0x9/0x20 [ 24.518316] [] ? selinux_file_permission+0x82/0x460 [ 24.524952] [] ? security_file_permission+0x89/0x1e0 [ 24.531672] [] ? rw_verify_area+0xe5/0x2b0 [ 24.537524] [] vfs_read+0x11e/0x380 [ 24.542766] [] SyS_read+0xd9/0x1b0 [ 24.547923] [] ? vfs_copy_file_range+0x740/0x740 [ 24.554294] [] ? do_fast_syscall_32+0xcf/0x890 [ 24.560492] [] ? vfs_copy_file_range+0x740/0x740 [ 24.566875] [] do_fast_syscall_32+0x2f7/0x890 [ 24.573531] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.580187] [] entry_SYSENTER_compat+0x51/0x60 [ 24.586383] 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 [ 24.612882] RIP [] __free_pages+0x21/0x80 [ 24.618770] RSP [ 24.622643] ---[ end trace 37662bf10c664978 ]--- [ 24.627491] Kernel panic - not syncing: Fatal exception [ 24.632874] Dumping ftrace buffer: [ 24.636384] (ftrace buffer empty) [ 24.640067] Kernel Offset: disabled [ 24.643659] Rebooting in 86400 seconds..