[....] Starting enhanced syslogd: rsyslogd[ 10.485075] audit: type=1400 audit(1514557221.399:4): avc: denied { syslog } for pid=3196 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 '10.128.0.9' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 18.099287] sg_write: data in/out 67097832/1 bytes for SCSI command 0x94-- guessing data in; [ 18.099287] program syzkaller994873 not setting count and/or reply_len properly [ 18.101381] sg_write: data in/out 67097832/1 bytes for SCSI command 0x94-- guessing data in; [ 18.101381] program syzkaller994873 not setting count and/or reply_len properly executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 18.562525] kasan: CONFIG_KASAN_INLINE enabled [ 18.567206] kasan: GPF could be caused by NULL-ptr deref or user memory access executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 18.605720] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 18.611995] Dumping ftrace buffer: [ 18.615518] (ftrace buffer empty) [ 18.619214] Modules linked in: [ 18.622526] CPU: 1 PID: 3362 Comm: syzkaller994873 Not tainted 4.9.72-gcb7518e #10 [ 18.630218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.639565] task: ffff8801cb739800 task.stack: ffff8801c61d8000 [ 18.645614] RIP: 0010:[] [] __free_pages+0x21/0x80 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 18.653906] RSP: 0018:ffff8801c61dfaa0 EFLAGS: 00010a07 [ 18.659338] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 18.666609] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 18.673878] RBP: ffff8801c61dfab0 R08: ffffed003abf4428 R09: 0000000000000000 [ 18.681137] R10: fffbaf8200000000 R11: ffffed003abf4428 R12: 0000000000000004 [ 18.688399] R13: 0000000000000020 R14: ffff8801c6388000 R15: dffffc0000000000 [ 18.695661] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7757b40 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 18.703874] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 18.709742] CR2: 0000000020012ff7 CR3: 00000001c9040000 CR4: 00000000001406e0 [ 18.717011] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.724273] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.731531] Stack: [ 18.733674] 0000000000000000 ffff8801c6388158 ffff8801c61dfb10 ffffffff82664fc1 [ 18.741712] ffff8801c6388170 ffffed0038c7102b ffffed0038c7102e ffff8801c6388168 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 18.749780] dead4ead00000000 ffff8801c6388140 0000000000000000 0000000000000000 [ 18.757799] Call Trace: [ 18.760377] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 18.766868] [] sg_finish_rem_req+0x2b5/0x340 [ 18.772920] [] sg_read+0xa1c/0x1440 [ 18.778190] [] ? save_stack_trace+0x16/0x20 [ 18.784181] [] ? save_stack+0x43/0xd0 [ 18.789626] [] ? kasan_slab_free+0x72/0xc0 [ 18.795504] [] ? kmem_cache_free+0xc7/0x300 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 18.801473] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.808135] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 18.815142] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 18.821805] [] __vfs_read+0x103/0x670 [ 18.827254] [] ? default_llseek+0x290/0x290 [ 18.833214] [] ? fsnotify+0x86/0xf30 [ 18.838549] [] ? fsnotify+0xf30/0xf30 [ 18.843969] [] ? avc_policy_seqno+0x9/0x20 [ 18.849826] [] ? selinux_file_permission+0x82/0x460 [ 18.856459] [] ? security_file_permission+0x89/0x1e0 [ 18.863181] [] ? rw_verify_area+0xe5/0x2b0 [ 18.869032] [] vfs_read+0x11e/0x380 [ 18.874276] [] SyS_read+0xd9/0x1b0 [ 18.879434] [] ? vfs_copy_file_range+0x740/0x740 [ 18.885809] [] ? do_fast_syscall_32+0xcf/0x890 [ 18.892008] [] ? vfs_copy_file_range+0x740/0x740 [ 18.898380] [] do_fast_syscall_32+0x2f7/0x890 executing program executing program executing program executing program [ 18.904493] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 18.911139] [] entry_SYSENTER_compat+0x51/0x60 [ 18.917336] 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 [ 18.943857] RIP [] __free_pages+0x21/0x80 [ 18.949736] RSP executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 18.956303] ---[ end trace 719894c771a34d26 ]--- [ 18.961170] Kernel panic - not syncing: Fatal exception [ 18.966979] Dumping ftrace buffer: [ 18.970489] (ftrace buffer empty) [ 18.974165] Kernel Offset: disabled [ 18.977759] Rebooting in 86400 seconds..