[....] Starting enhanced syslogd: rsyslogd[ 10.594740] audit: type=1400 audit(1514768678.483:4): avc: denied { syslog } for pid=3174 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 19.769635] kasan: CONFIG_KASAN_INLINE enabled [ 19.770455] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.771423] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.772254] Dumping ftrace buffer: [ 19.772725] (ftrace buffer empty) [ 19.773217] Modules linked in: [ 19.773694] CPU: 0 PID: 3322 Comm: syzkaller875437 Not tainted 4.9.73-gf3f3457 #11 [ 19.774704] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.775945] task: ffff8801cb384800 task.stack: ffff8801c8980000 [ 19.776744] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 19.777853] RSP: 0018:ffff8801c8987940 EFLAGS: 00010a07 [ 19.778583] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 19.779580] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 19.780556] RBP: ffff8801c8987950 R08: 0000000000000001 R09: 0000000000000000 [ 19.781521] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 19.782472] R13: 0000000000000020 R14: ffff8801bf102100 R15: dffffc0000000000 [ 19.783426] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008b0b840 [ 19.784542] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.785315] CR2: 0000000020430000 CR3: 00000001c9b7d000 CR4: 00000000001406f0 [ 19.786268] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.787242] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.788192] Stack: [ 19.788490] ffff8801cb384800 ffff8801bf102258 ffff8801c89879b0 ffffffff82664fc1 [ 19.789622] ffff8801bf102270 ffffed0037e2044b ffffed0037e2044e ffff8801bf102268 [ 19.796783] dead4ead00000000 ffff8801bf102240 0000000000000000 0000000000000000 [ 19.804736] Call Trace: [ 19.807295] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 19.813760] [] sg_finish_rem_req+0x2b5/0x340 [ 19.819787] [] sg_new_read.isra.20+0x39/0x3e0 [ 19.825898] [] ? sg_get_rq_mark+0x142/0x190 [ 19.831863] [] sg_read+0x8bd/0x1440 [ 19.837111] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.843748] [] ? fsnotify+0xf30/0xf30 [ 19.849190] [] ? avc_policy_seqno+0x9/0x20 [ 19.855055] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 19.862040] [] ? security_file_permission+0x89/0x1e0 [ 19.870158] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.876788] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.883420] [] compat_do_readv_writev+0x522/0x760 [ 19.889879] [] ? do_pwritev+0x1a0/0x1a0 [ 19.895476] [] ? _raw_spin_unlock+0x2c/0x50 [ 19.901422] [] ? handle_mm_fault+0x6ee/0x2530 [ 19.907531] [] ? __pmd_alloc+0x410/0x410 [ 19.913211] [] compat_readv+0xe3/0x150 [ 19.918713] [] do_compat_readv+0xf4/0x1d0 [ 19.924474] [] ? compat_readv+0x150/0x150 [ 19.930240] [] compat_SyS_readv+0x26/0x30 [ 19.936710] [] ? SyS_pwritev2+0x80/0x80 [ 19.942304] [] do_fast_syscall_32+0x2f7/0x890 [ 19.948423] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.955054] [] entry_SYSENTER_compat+0x51/0x60 [ 19.961253] 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 [ 19.987546] RIP [] __free_pages+0x21/0x80 [ 19.993420] RSP [ 19.997278] ---[ end trace ec81859dabd95920 ]--- [ 20.002015] Kernel panic - not syncing: Fatal exception [ 20.007757] Dumping ftrace buffer: [ 20.011266] (ftrace buffer empty) [ 20.014941] Kernel Offset: disabled [ 20.018532] Rebooting in 86400 seconds..