[....] Starting enhanced syslogd: rsyslogd[ 10.693487] audit: type=1400 audit(1514365724.382:4): avc: denied { syslog } for pid=3172 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 '10.128.0.28' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 syzkaller login: [ 32.716567] IPVS: Creating netns size=2536 id=1 net.ipv6.conf.syz6.accept_dad = 0 executing program net.ipv6.conf.syz6.router_solicitations = 0 [ 32.743863] IPVS: Creating netns size=2536 id=2 executing program executing program executing program executing program executing program executing program executing program executing program net.ipv6.conf.syz4.accept_dad = 0 executing program executing program net.ipv6.conf.syz4.router_solicitations = 0 executing program executing program executing program [ 32.765932] sg_write: data in/out 65500/36 bytes for SCSI command 0x0-- guessing data in; [ 32.765932] program syzkaller258773 not setting count and/or reply_len properly [ 32.794127] IPVS: Creating netns size=2536 id=3 [ 32.811280] IPVS: Creating netns size=2536 id=4 executing program executing program net.ipv6.conf.syz7.accept_dad = 0 executing program executing program executing program net.ipv6.conf.syz7.router_solicitations = 0 executing program executing program [ 32.837131] IPVS: Creating netns size=2536 id=5 executing program executing program executing program executing program net.ipv6.conf.syz1.accept_dad = 0 executing program executing program executing program executing program executing program [ 32.866900] IPVS: Creating netns size=2536 id=6 net.ipv6.conf.syz1.router_solicitations = 0 executing program executing program executing program executing program net.ipv6.conf.syz3.accept_dad = 0 executing program executing program [ 32.907244] IPVS: Creating netns size=2536 id=7 executing program executing program executing program net.ipv6.conf.syz3.router_solicitations = 0 executing program executing program executing program executing program executing program executing program net.ipv6.conf.syz5.accept_dad = 0 executing program executing program executing program [ 32.936118] IPVS: Creating netns size=2536 id=8 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program net.ipv6.conf.syz2.accept_dad = 0 executing program executing program executing program executing program executing program executing program executing program executing program net.ipv6.conf.syz5.router_solicitations = 0 executing program executing program executing program executing program executing program executing program 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.668414] kasan: CONFIG_KASAN_INLINE enabled [ 33.673989] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.700347] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.706580] Dumping ftrace buffer: [ 33.710091] (ftrace buffer empty) [ 33.713769] Modules linked in: [ 33.717572] CPU: 1 PID: 3503 Comm: syzkaller258773 Not tainted 4.9.71-g2506378 #9 [ 33.725159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.734478] task: ffff8801c6078000 task.stack: ffff8801bfe28000 [ 33.740500] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 33.748737] RSP: 0018:ffff8801bfe2faa0 EFLAGS: 00010a07 [ 33.754150] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 33.761394] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 33.768633] RBP: ffff8801bfe2fab0 R08: ffffed0037c10cac R09: ffff8801be086540 [ 33.775870] R10: 0000000000000005 R11: ffffed0037c10cac R12: 0000000000000004 [ 33.783114] R13: 0000000000000020 R14: ffff8801c06d4200 R15: dffffc0000000000 [ 33.790371] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f776cb40 [ 33.798591] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 33.804440] CR2: 00000000205a5ff7 CR3: 00000001c1e66000 CR4: 00000000001406e0 [ 33.811679] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.818916] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.826168] Stack: [ 33.828293] 0000000000000000 ffff8801c06d4358 ffff8801bfe2fb10 ffffffff82664e11 [ 33.836246] ffff8801c06d4370 ffffed00380da86b ffffed00380da86e ffff8801c06d4368 [ 33.844194] dead4ead00000000 ffff8801c06d4340 0000000000000000 0000000000000000 [ 33.852141] Call Trace: [ 33.854697] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 33.861160] [] sg_finish_rem_req+0x2b5/0x340 [ 33.867183] [] sg_read+0xa1c/0x1440 [ 33.872425] [] ? save_stack_trace+0x16/0x20 [ 33.878361] [] ? save_stack+0x43/0xd0 [ 33.883788] [] ? kasan_slab_free+0x72/0xc0 [ 33.889638] [] ? kmem_cache_free+0xc7/0x300 [ 33.895576] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 33.902209] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 33.909188] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 33.915818] [] __vfs_read+0x103/0x670 [ 33.921234] [] ? default_llseek+0x290/0x290 [ 33.927174] [] ? fsnotify+0x86/0xf30 [ 33.932502] [] ? fsnotify+0xf30/0xf30 [ 33.937920] [] ? avc_policy_seqno+0x9/0x20 [ 33.943768] [] ? selinux_file_permission+0x82/0x460 [ 33.950402] [] ? security_file_permission+0x89/0x1e0 [ 33.957121] [] ? rw_verify_area+0xe5/0x2b0 [ 33.962970] [] vfs_read+0x11e/0x380 [ 33.968213] [] SyS_read+0xd9/0x1b0 [ 33.973367] [] ? vfs_copy_file_range+0x740/0x740 [ 33.979740] [] ? do_fast_syscall_32+0xcf/0x890 [ 33.985938] [] ? vfs_copy_file_range+0x740/0x740 [ 33.992308] [] do_fast_syscall_32+0x2f7/0x890 [ 33.998419] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.005051] [] entry_SYSENTER_compat+0x51/0x60 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.011251] 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 [ 34.037556] RIP [] __free_pages+0x21/0x80 [ 34.043434] RSP [ 34.055391] ---[ end trace b98563b8d973c13a ]--- [ 34.061208] Kernel panic - not syncing: Fatal exception [ 34.066934] Dumping ftrace buffer: [ 34.070443] (ftrace buffer empty) [ 34.074122] Kernel Offset: disabled [ 34.077717] Rebooting in 86400 seconds..