[....] Starting enhanced syslogd: rsyslogd[ 9.769982] audit: type=1400 audit(1514285118.749:4): avc: denied { syslog } for pid=3176 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 'ci-android-49-kasan-gce-7,10.128.0.83' (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 syzkaller login: [ 38.686623] kasan: CONFIG_KASAN_INLINE enabled [ 38.687348] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.688316] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.689136] Dumping ftrace buffer: [ 38.689610] (ftrace buffer empty) [ 38.690119] Modules linked in: [ 38.690586] CPU: 0 PID: 3343 Comm: syzkaller978511 Not tainted 4.9.71-g2506378 #113 [ 38.691604] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.692832] task: ffff8801ca9ec800 task.stack: ffff8801d0430000 [ 38.693629] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 38.696106] RSP: 0018:ffff8801d04379b0 EFLAGS: 00010a07 [ 38.697112] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 38.698330] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 38.699821] RBP: ffff8801d04379c0 R08: 0000000000000001 R09: 0000000000000000 [ 38.701060] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 38.702331] R13: 0000000000000020 R14: ffff8801c0a54200 R15: dffffc0000000000 [ 38.704028] FS: 00000000007b1880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 38.705819] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.706881] CR2: 0000000020bb7000 CR3: 00000001c9a9f000 CR4: 00000000001406f0 [ 38.714127] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.721360] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.728593] Stack: [ 38.730708] ffff8801ca9ec800 ffff8801c0a54358 ffff8801d0437a20 ffffffff82664e11 [ 38.738665] ffff8801c0a54370 ffffed003814a86b ffffed003814a86e ffff8801c0a54368 [ 38.746613] dead4ead00000000 ffff8801c0a54340 0000000000000000 0000000000000000 [ 38.754561] Call Trace: [ 38.757464] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 38.763923] [] sg_finish_rem_req+0x2b5/0x340 [ 38.769945] [] sg_new_read.isra.20+0x39/0x3e0 [ 38.776053] [] ? sg_get_rq_mark+0x142/0x190 [ 38.781988] [] sg_read+0x8bd/0x1440 [ 38.787230] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 38.793867] [] ? fsnotify+0xf30/0xf30 [ 38.799290] [] ? avc_policy_seqno+0x9/0x20 [ 38.805149] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 38.812124] [] ? security_file_permission+0x89/0x1e0 [ 38.818838] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 38.825468] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 38.832098] [] do_readv_writev+0x520/0x750 [ 38.837947] [] ? vfs_write+0x530/0x530 [ 38.843453] [] ? __pmd_alloc+0x410/0x410 [ 38.849127] [] ? __do_page_fault+0x5ec/0xd40 [ 38.855149] [] vfs_readv+0x84/0xc0 [ 38.860303] [] do_readv+0xe6/0x250 [ 38.865457] [] ? vfs_readv+0xc0/0xc0 [ 38.870784] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 38.877416] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 38.884221] [] SyS_readv+0x27/0x30 [ 38.889377] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 38.895917] 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 [ 38.922186] RIP [] __free_pages+0x21/0x80 [ 38.928703] RSP [ 38.934013] ---[ end trace 43c46b7f16bbb089 ]--- [ 38.940271] Kernel panic - not syncing: Fatal exception [ 38.948698] Dumping ftrace buffer: [ 38.953402] (ftrace buffer empty) [ 38.958395] Kernel Offset: disabled [ 38.963325] Rebooting in 86400 seconds..