[....] Starting enhanced syslogd: rsyslogd[ 13.681710] audit: type=1400 audit(1521900926.648:4): avc: denied { syslog } for pid=3649 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. 2018/03/24 14:15:47 parsed 1 programs 2018/03/24 14:15:47 executed programs: 0 syzkaller login: [ 34.178667] IPVS: Creating netns size=2536 id=1 [ 36.928221] kasan: CONFIG_KASAN_INLINE enabled [ 36.932933] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.940302] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.946506] Dumping ftrace buffer: [ 36.950015] (ftrace buffer empty) [ 36.953698] Modules linked in: [ 36.956982] CPU: 0 PID: 4786 Comm: syz-executor0 Not tainted 4.9.89-ge34e318 #4 [ 36.964399] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.973736] task: ffff8801cf570000 task.stack: ffff8801c4a70000 [ 36.979761] RIP: 0010:[] [] sg_remove_scat.isra.19+0x17b/0x2d0 [ 36.989044] RSP: 0018:ffff8801c4a77ac0 EFLAGS: 00010202 [ 36.994464] RAX: 1ffff1003890c02d RBX: ffff8801c4860158 RCX: 0000000000000001 [ 37.001702] RDX: 0000000000000008 RSI: 0000000000000000 RDI: ffff8801cfe4c874 [ 37.008941] RBP: ffff8801c4a77b10 R08: 0000000000000000 R09: ffffed0039f203e5 [ 37.016182] R10: 0000000000000005 R11: ffffed0039f203e4 R12: 0000000000000001 [ 37.023421] R13: 0000000000000008 R14: 0000000000000000 R15: dffffc0000000000 [ 37.030662] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f77b8b40 [ 37.038859] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 37.044712] CR2: 000055da96f3e040 CR3: 00000001d0090000 CR4: 0000000000160670 [ 37.051955] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.059199] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.066439] Stack: [ 37.068558] ffff8801c4860170 ffffed003890c02b ffffed003890c02e ffff8801c4860168 [ 37.076531] ffff8801cfe4c858 ffff8801c4860140 0000000000000000 0000000000000000 [ 37.085181] 0000000000000000 ffff8801c4860238 ffff8801c4a77b50 ffffffff826678a6 [ 37.093150] Call Trace: [ 37.095714] [] sg_finish_rem_req+0x2a6/0x320 [ 37.101743] [] sg_read+0xa22/0x1470 [ 37.106994] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 37.113639] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 37.120626] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 37.127269] [] __vfs_read+0x103/0x670 [ 37.132690] [] ? default_llseek+0x290/0x290 [ 37.138632] [] ? fsnotify+0x86/0xf30 [ 37.143965] [] ? fsnotify+0xf30/0xf30 [ 37.149404] [] ? avc_policy_seqno+0x9/0x20 [ 37.155261] [] ? selinux_file_permission+0x82/0x460 [ 37.161900] [] ? security_file_permission+0x89/0x1e0 [ 37.168623] [] ? rw_verify_area+0xe5/0x2b0 [ 37.174478] [] vfs_read+0x11e/0x380 [ 37.179723] [] SyS_read+0xd9/0x1b0 [ 37.184891] [] ? vfs_copy_file_range+0x740/0x740 [ 37.191284] [] ? do_fast_syscall_32+0xcf/0x870 [ 37.197489] [] ? vfs_copy_file_range+0x740/0x740 [ 37.203884] [] do_fast_syscall_32+0x2f5/0x870 [ 37.210002] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.216642] [] entry_SYSENTER_compat+0x90/0xa2 [ 37.222841] Code: 45 b8 eb 3e e8 97 1b d0 fe 48 8b 45 c8 48 c1 e8 03 42 80 3c 38 00 0f 85 3a 01 00 00 4c 8b 73 10 4b 8d 14 2e 48 89 d1 48 c1 e9 03 <42> 80 3c 39 00 0f 85 0b 01 00 00 48 8b 12 49 83 c5 08 48 85 d2 [ 37.249416] RIP [] sg_remove_scat.isra.19+0x17b/0x2d0 [ 37.256345] RSP [ 37.260161] ---[ end trace cff0d79d078285f8 ]--- [ 37.265097] Kernel panic - not syncing: Fatal exception [ 37.270854] Dumping ftrace buffer: [ 37.274370] (ftrace buffer empty) [ 37.278053] Kernel Offset: disabled [ 37.281651] Rebooting in 86400 seconds..