[....] Starting enhanced syslogd: rsyslogd[ 12.998986] audit: type=1400 audit(1514367648.261:4): avc: denied { syslog } for pid=3166 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 '10.128.0.27' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.406292] kasan: CONFIG_KASAN_INLINE enabled [ 24.410885] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.418253] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 24.424453] Dumping ftrace buffer: [ 24.427959] (ftrace buffer empty) [ 24.431637] Modules linked in: [ 24.434912] CPU: 0 PID: 3328 Comm: syzkaller291146 Not tainted 4.9.71-g2506378 #9 [ 24.442499] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.451820] task: ffff8801cbefb000 task.stack: ffff8801c8628000 [ 24.457850] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 24.466073] RSP: 0018:ffff8801c862fa50 EFLAGS: 00010a07 [ 24.471486] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 24.478722] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 24.485962] RBP: ffff8801c862fa60 R08: 0000000000000001 R09: 0000000000000000 [ 24.493198] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 24.500438] R13: 0000000000000020 R14: ffff8801caa74200 R15: dffffc0000000000 [ 24.507674] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000085e6840 [ 24.515872] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 24.521719] CR2: 0000000020001000 CR3: 00000001c8807000 CR4: 00000000001406f0 [ 24.528955] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.536192] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.543427] Stack: [ 24.545538] ffff8801cbefb000 ffff8801caa74358 ffff8801c862fac0 ffffffff82664e11 [ 24.553483] ffff8801caa74370 ffffed003954e86b ffffed003954e86e ffff8801caa74368 [ 24.561429] dead4ead00000000 ffff8801caa74340 0000000000000000 0000000000000000 [ 24.569374] Call Trace: [ 24.571928] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 24.578384] [] sg_finish_rem_req+0x2b5/0x340 [ 24.584404] [] sg_new_read.isra.20+0x39/0x3e0 [ 24.590512] [] ? sg_get_rq_mark+0x142/0x190 [ 24.596447] [] sg_read+0x8bd/0x1440 [ 24.601689] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.608318] [] ? lru_cache_add+0xd9/0x1e0 [ 24.614079] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 24.621661] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.628293] [] __vfs_read+0x103/0x670 [ 24.633717] [] ? default_llseek+0x290/0x290 [ 24.639655] [] ? fsnotify+0x86/0xf30 [ 24.644984] [] ? fsnotify+0xf30/0xf30 [ 24.650406] [] ? avc_policy_seqno+0x9/0x20 [ 24.656262] [] ? selinux_file_permission+0x82/0x460 [ 24.662902] [] ? security_file_permission+0x89/0x1e0 [ 24.669626] [] ? rw_verify_area+0xe5/0x2b0 [ 24.675478] [] vfs_read+0x11e/0x380 [ 24.680729] [] SyS_read+0xd9/0x1b0 [ 24.685883] [] ? vfs_copy_file_range+0x740/0x740 [ 24.692256] [] ? do_fast_syscall_32+0xcf/0x890 [ 24.698461] [] ? vfs_copy_file_range+0x740/0x740 [ 24.704838] [] do_fast_syscall_32+0x2f7/0x890 [ 24.710947] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.717588] [] entry_SYSENTER_compat+0x51/0x60 [ 24.723782] 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 [ 24.750029] RIP [] __free_pages+0x21/0x80 [ 24.755903] RSP [ 24.759699] ---[ end trace a78549d44ee3d975 ]--- [ 24.764525] Kernel panic - not syncing: Fatal exception [ 24.770264] Dumping ftrace buffer: [ 24.773775] (ftrace buffer empty) [ 24.777452] Kernel Offset: disabled [ 24.781043] Rebooting in 86400 seconds..