[....] Starting enhanced syslogd: rsyslogd[ 10.875273] audit: type=1400 audit(1514742661.966:4): avc: denied { syslog } for pid=3188 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.0.61' (ECDSA) to the list of known hosts. net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz5.accept_dad = 0 net.ipv6.conf.syz4.accept_dad = 0 net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz3.accept_dad = 0 net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz2.accept_dad = 0 net.ipv6.conf.syz4.router_solicitations = 0 net.ipv6.conf.syz3.router_solicitations = 0 net.ipv6.conf.syz6.router_solicitations = 0 net.ipv6.conf.syz5.router_solicitations = 0 net.ipv6.conf.syz0.router_solicitations = 0 net.ipv6.conf.syz1.router_solicitations = 0 net.ipv6.conf.syz7.router_solicitations = 0 net.ipv6.conf.syz2.router_solicitations = 0 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: [ 19.942573] sg_write: data in/out 1870749719/174 bytes for SCSI command 0x46-- guessing data in; [ 19.942573] program syzkaller411292 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 [ 19.947165] sg_write: data in/out 1870749719/174 bytes for SCSI command 0x46-- guessing data in; [ 19.947165] program syzkaller411292 not setting count and/or reply_len properly [ 19.991845] kasan: CONFIG_KASAN_INLINE enabled [ 19.991847] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.991855] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.991860] Dumping ftrace buffer: [ 19.991864] (ftrace buffer empty) [ 19.991868] Modules linked in: [ 19.991875] CPU: 1 PID: 3528 Comm: syzkaller411292 Not tainted 4.9.73-gf3f3457 #11 [ 19.991884] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.991888] task: ffff8801c3324800 task.stack: ffff8801c0f40000 [ 19.991905] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 19.991908] RSP: 0018:ffff8801c0f47aa0 EFLAGS: 00010a07 [ 19.991912] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 19.991916] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 19.991920] RBP: ffff8801c0f47ab0 R08: ffffed00393853f0 R09: ffff8801c9c29f60 [ 19.991923] R10: 0000000000000005 R11: ffffed00393853f0 R12: 0000000000000004 [ 19.991927] R13: 0000000000000020 R14: ffff8801ca43a100 R15: dffffc0000000000 [ 19.991932] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f76eeb40 [ 19.991936] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.991940] CR2: 00000000205c7f24 CR3: 00000001cb743000 CR4: 00000000001406e0 [ 19.991946] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.991950] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.991951] Stack: [ 19.991961] 0000000000000000 ffff8801ca43a258 ffff8801c0f47b10 ffffffff82664fc1 [ 19.991970] ffff8801ca43a270 ffffed003948744b ffffed003948744e ffff8801ca43a268 [ 19.991979] dead4ead00000000 ffff8801ca43a240 0000000000000000 0000000000000000 [ 19.991980] Call Trace: [ 19.991989] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 19.991996] [] sg_finish_rem_req+0x2b5/0x340 [ 19.992003] [] sg_read+0xa1c/0x1440 [ 19.992010] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.992020] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 19.992026] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.992035] [] __vfs_read+0x103/0x670 [ 19.992042] [] ? default_llseek+0x290/0x290 [ 19.992050] [] ? fsnotify+0x86/0xf30 [ 19.992057] [] ? fsnotify+0xf30/0xf30 [ 19.992066] [] ? avc_policy_seqno+0x9/0x20 [ 19.992074] [] ? selinux_file_permission+0x82/0x460 [ 19.992080] [] ? security_file_permission+0x89/0x1e0 [ 19.992087] [] ? rw_verify_area+0xe5/0x2b0 [ 19.992094] [] vfs_read+0x11e/0x380 [ 19.992101] [] SyS_read+0xd9/0x1b0 [ 19.992108] [] ? vfs_copy_file_range+0x740/0x740 [ 19.992115] [] ? do_fast_syscall_32+0xcf/0x890 [ 19.992122] [] ? vfs_copy_file_range+0x740/0x740 [ 19.992129] [] do_fast_syscall_32+0x2f7/0x890 [ 19.992135] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.992143] [] entry_SYSENTER_compat+0x51/0x60 [ 19.992246] 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 [ 19.992253] RIP [] __free_pages+0x21/0x80 [ 19.992256] RSP [ 19.992263] ---[ end trace cff3b470d703e430 ]--- [ 19.992267] Kernel panic - not syncing: Fatal exception [ 19.992923] Dumping ftrace buffer: [ 19.992926] (ftrace buffer empty) [ 19.992928] Kernel Offset: disabled [ 20.342232] Rebooting in 86400 seconds..