[....] Starting enhanced syslogd: rsyslogd[ 10.306145] audit: type=1400 audit(1514389092.229:4): avc: denied { syslog } for pid=3170 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 '10.128.15.202' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 18.806994] sg_write: data in/out 262108/32 bytes for SCSI command 0x0-- guessing data in; [ 18.806994] program syzkaller924026 not setting count and/or reply_len properly [ 18.810378] kasan: CONFIG_KASAN_INLINE enabled [ 18.811028] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.812004] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 18.812893] Dumping ftrace buffer: [ 18.813367] (ftrace buffer empty) [ 18.813861] Modules linked in: [ 18.814333] CPU: 1 PID: 3319 Comm: syzkaller924026 Not tainted 4.9.72-gcb7518e #10 [ 18.815339] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.816723] task: ffff8801ca16e000 task.stack: ffff8801c8800000 [ 18.817529] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 18.818634] RSP: 0018:ffff8801c8807a50 EFLAGS: 00010a07 [ 18.819373] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 18.820323] RDX: 1bd5a9d5a0000003 RSI: 0000000000000008 RDI: dead4ead0000001c [ 18.821277] RBP: ffff8801c8807a60 R08: 0000000000000001 R09: 0000000000000001 [ 18.822246] R10: 0000000000000000 R11: ffff8801ca16e000 R12: 0000000000000004 [ 18.823286] R13: 0000000000000020 R14: ffff8801c9248000 R15: dffffc0000000000 [ 18.824250] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009dc2840 [ 18.825341] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 18.826169] CR2: 0000000020db9000 CR3: 00000001c8b34000 CR4: 00000000001406e0 [ 18.827122] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.834369] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.841602] Stack: [ 18.843718] ffffffff838affb9 ffff8801c9248158 ffff8801c8807ac0 ffffffff82664fc1 [ 18.851685] ffff8801c9248170 ffffed003924902b ffffed003924902e ffff8801c9248168 [ 18.859647] dead4ead00000000 ffff8801c9248140 0000000000000000 0000000000000000 [ 18.867594] Call Trace: [ 18.870152] [] ? retint_kernel+0x2d/0x2d [ 18.875839] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 18.882301] [] sg_finish_rem_req+0x2b5/0x340 [ 18.888324] [] sg_new_read.isra.20+0x356/0x3e0 [ 18.894520] [] ? sg_get_rq_mark+0x15b/0x190 [ 18.900454] [] sg_read+0x8bd/0x1440 [ 18.905694] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.912327] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 18.919391] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.926024] [] __vfs_read+0x103/0x670 [ 18.931453] [] ? default_llseek+0x290/0x290 [ 18.937390] [] ? fsnotify+0x86/0xf30 [ 18.942720] [] ? fsnotify+0xf30/0xf30 [ 18.948137] [] ? avc_policy_seqno+0x9/0x20 [ 18.954380] [] ? selinux_file_permission+0x82/0x460 [ 18.961012] [] ? security_file_permission+0x89/0x1e0 [ 18.967738] [] ? rw_verify_area+0xe5/0x2b0 [ 18.973594] [] vfs_read+0x11e/0x380 [ 18.978835] [] SyS_read+0xd9/0x1b0 [ 18.983990] [] ? vfs_copy_file_range+0x740/0x740 [ 18.990359] [] ? do_fast_syscall_32+0xcf/0x890 [ 18.996555] [] ? vfs_copy_file_range+0x740/0x740 [ 19.002931] [] do_fast_syscall_32+0x2f7/0x890 [ 19.009041] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.015673] [] entry_SYSENTER_compat+0x51/0x60 [ 19.021867] 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 [ 19.048251] RIP [] __free_pages+0x21/0x80 [ 19.054130] RSP [ 19.058009] ---[ end trace cd4d0d82b5866635 ]--- [ 19.062899] Kernel panic - not syncing: Fatal exception [ 19.068276] Dumping ftrace buffer: [ 19.071788] (ftrace buffer empty) [ 19.075463] Kernel Offset: disabled [ 19.079056] Rebooting in 86400 seconds..