[....] Starting enhanced syslogd: rsyslogd[ 10.748321] audit: type=1400 audit(1514754745.194:4): avc: denied { syslog } for pid=3161 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.403266] sg_write: data in/out 29964/54 bytes for SCSI command 0x10-- guessing data in; [ 19.403266] program syzkaller742391 not setting count and/or reply_len properly [ 19.405648] kasan: CONFIG_KASAN_INLINE enabled [ 19.406325] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.407390] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.408212] Dumping ftrace buffer: [ 19.408690] (ftrace buffer empty) [ 19.409196] Modules linked in: [ 19.409699] CPU: 1 PID: 3313 Comm: syzkaller742391 Not tainted 4.9.73-gf3f3457 #11 [ 19.410760] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.412018] task: ffff8801c9eb8000 task.stack: ffff8801c9538000 [ 19.412815] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 19.414112] RSP: 0018:ffff8801c953fa50 EFLAGS: 00010a07 [ 19.414891] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 19.415870] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 19.416822] RBP: ffff8801c953fa60 R08: 0000000000000001 R09: 0000000000000000 [ 19.417790] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 19.418761] R13: 0000000000000020 R14: ffff8801c9478000 R15: dffffc0000000000 [ 19.419774] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009e52840 [ 19.420886] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.421662] CR2: 0000000020001000 CR3: 00000001cbcc4000 CR4: 00000000001406e0 [ 19.422617] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.423592] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.430846] Stack: [ 19.432966] ffff8801c9eb8000 ffff8801c9478158 ffff8801c953fac0 ffffffff82664fc1 [ 19.440926] ffff8801c9478170 ffffed003928f02b ffffed003928f02e ffff8801c9478168 [ 19.448878] dead4ead00000000 ffff8801c9478140 0000000000000000 0000000000000000 [ 19.456829] Call Trace: [ 19.459389] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 19.465849] [] sg_finish_rem_req+0x2b5/0x340 [ 19.471875] [] sg_new_read.isra.20+0x39/0x3e0 [ 19.477991] [] ? sg_get_rq_mark+0x142/0x190 [ 19.483936] [] sg_read+0x8bd/0x1440 [ 19.489188] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.495835] [] ? lru_cache_add+0xd9/0x1e0 [ 19.501612] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 19.508680] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.515343] [] __vfs_read+0x103/0x670 [ 19.520762] [] ? default_llseek+0x290/0x290 [ 19.526700] [] ? fsnotify+0x86/0xf30 [ 19.532033] [] ? fsnotify+0xf30/0xf30 [ 19.537449] [] ? avc_policy_seqno+0x9/0x20 [ 19.543300] [] ? selinux_file_permission+0x82/0x460 [ 19.549932] [] ? security_file_permission+0x89/0x1e0 [ 19.556651] [] ? rw_verify_area+0xe5/0x2b0 [ 19.562512] [] vfs_read+0x11e/0x380 [ 19.567759] [] SyS_read+0xd9/0x1b0 [ 19.572918] [] ? vfs_copy_file_range+0x740/0x740 [ 19.579291] [] ? do_fast_syscall_32+0xcf/0x890 [ 19.585489] [] ? vfs_copy_file_range+0x740/0x740 [ 19.591859] [] do_fast_syscall_32+0x2f7/0x890 [ 19.597972] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.604609] [] entry_SYSENTER_compat+0x51/0x60 [ 19.610816] 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 [ 19.637238] RIP [] __free_pages+0x21/0x80 [ 19.643121] RSP [ 19.647025] ---[ end trace fac58dbce0e1b94c ]--- [ 19.651901] Kernel panic - not syncing: Fatal exception [ 19.657710] Dumping ftrace buffer: [ 19.661233] (ftrace buffer empty) [ 19.664923] Kernel Offset: disabled [ 19.668515] Rebooting in 86400 seconds..