[....] Starting enhanced syslogd: rsyslogd[ 11.952714] audit: type=1400 audit(1514497049.623:4): avc: denied { syslog } for pid=3178 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[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.233' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.471648] kasan: CONFIG_KASAN_INLINE enabled [ 19.476239] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.484424] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.490653] Dumping ftrace buffer: [ 19.494157] (ftrace buffer empty) [ 19.497834] Modules linked in: [ 19.501112] CPU: 0 PID: 3326 Comm: syzkaller608563 Not tainted 4.9.72-gcb7518e #10 [ 19.508779] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.518097] task: ffff8801cb174800 task.stack: ffff8801c9e48000 [ 19.524117] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 19.532349] RSP: 0018:ffff8801c9e4fa50 EFLAGS: 00010a07 [ 19.537778] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 19.545016] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 19.552250] RBP: ffff8801c9e4fa60 R08: 0000000000000001 R09: 0000000000000000 [ 19.559493] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 19.566725] R13: 0000000000000020 R14: ffff8801cb38c200 R15: dffffc0000000000 [ 19.573969] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008f5f840 [ 19.582175] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.588021] CR2: 00007f1f77fa4000 CR3: 00000001cd9ed000 CR4: 00000000001406f0 [ 19.595265] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.602503] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.609738] Stack: [ 19.611853] ffff8801cb174800 ffff8801cb38c358 ffff8801c9e4fac0 ffffffff82664fc1 [ 19.619808] ffff8801cb38c370 ffffed003967186b ffffed003967186e ffff8801cb38c368 [ 19.627757] dead4ead00000000 ffff8801cb38c340 0000000000000000 0000000000000000 [ 19.635703] Call Trace: [ 19.638260] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 19.644716] [] sg_finish_rem_req+0x2b5/0x340 [ 19.650742] [] sg_new_read.isra.20+0x39/0x3e0 [ 19.656848] [] ? sg_get_rq_mark+0x142/0x190 [ 19.662782] [] sg_read+0x8bd/0x1440 [ 19.668020] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.674652] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 19.681714] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.688344] [] __vfs_read+0x103/0x670 [ 19.693759] [] ? default_llseek+0x290/0x290 [ 19.699694] [] ? fsnotify+0x86/0xf30 [ 19.705021] [] ? fsnotify+0xf30/0xf30 [ 19.710434] [] ? avc_policy_seqno+0x9/0x20 [ 19.716282] [] ? selinux_file_permission+0x82/0x460 [ 19.722910] [] ? security_file_permission+0x89/0x1e0 [ 19.729625] [] ? rw_verify_area+0xe5/0x2b0 [ 19.735473] [] vfs_read+0x11e/0x380 [ 19.740712] [] SyS_read+0xd9/0x1b0 [ 19.745865] [] ? vfs_copy_file_range+0x740/0x740 [ 19.752238] [] ? do_fast_syscall_32+0xcf/0x890 [ 19.758432] [] ? vfs_copy_file_range+0x740/0x740 [ 19.764806] [] do_fast_syscall_32+0x2f7/0x890 [ 19.770913] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.777542] [] entry_SYSENTER_compat+0x51/0x60 [ 19.783732] 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 [ 19.809979] RIP [] __free_pages+0x21/0x80 [ 19.815855] RSP [ 19.819661] ---[ end trace 50e113bc24e1a043 ]--- [ 19.824388] Kernel panic - not syncing: Fatal exception [ 19.830206] Dumping ftrace buffer: [ 19.833711] (ftrace buffer empty) [ 19.837385] Kernel Offset: disabled [ 19.840975] Rebooting in 86400 seconds..