[....] Starting enhanced syslogd: rsyslogd[ 10.644002] audit: type=1400 audit(1514613885.681:4): avc: denied { syslog } for pid=3180 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 '10.128.0.58' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.559407] kasan: CONFIG_KASAN_INLINE enabled [ 19.560130] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.561097] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.561953] Dumping ftrace buffer: [ 19.562424] (ftrace buffer empty) [ 19.562917] Modules linked in: [ 19.563385] CPU: 1 PID: 3328 Comm: syzkaller126105 Not tainted 4.9.73-gf3f3457 #11 [ 19.564390] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.565623] task: ffff8801ca941800 task.stack: ffff8801c9250000 [ 19.566504] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 19.567732] RSP: 0018:ffff8801c9257940 EFLAGS: 00010a07 [ 19.568489] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 19.569489] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 19.570495] RBP: ffff8801c9257950 R08: 0000000000000001 R09: 0000000000000000 [ 19.571446] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 19.572479] R13: 0000000000000020 R14: ffff8801c91e2100 R15: dffffc0000000000 [ 19.573430] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000896c840 [ 19.574501] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.575301] CR2: 0000000020002f90 CR3: 00000001caa7c000 CR4: 00000000001406e0 [ 19.576252] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.577227] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.578280] Stack: [ 19.578587] ffff8801ca941800 ffff8801c91e2258 ffff8801c92579b0 ffffffff82664fc1 [ 19.581303] ffff8801c91e2270 ffffed003923c44b ffffed003923c44e ffff8801c91e2268 [ 19.589265] dead4ead00000000 ffff8801c91e2240 0000000000000000 0000000000000000 [ 19.597222] Call Trace: [ 19.599776] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 19.606234] [] sg_finish_rem_req+0x2b5/0x340 [ 19.612259] [] sg_new_read.isra.20+0x39/0x3e0 [ 19.618375] [] ? sg_get_rq_mark+0x142/0x190 [ 19.624309] [] sg_read+0x8bd/0x1440 [ 19.629558] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.636203] [] ? fsnotify+0xf30/0xf30 [ 19.641629] [] ? avc_policy_seqno+0x9/0x20 [ 19.647500] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 19.654482] [] ? security_file_permission+0x89/0x1e0 [ 19.661200] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.667832] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.674462] [] compat_do_readv_writev+0x522/0x760 [ 19.680919] [] ? do_pwritev+0x1a0/0x1a0 [ 19.686516] [] ? handle_mm_fault+0xa96/0x2530 [ 19.692627] [] compat_readv+0xe3/0x150 [ 19.698128] [] do_compat_readv+0xf4/0x1d0 [ 19.703897] [] ? compat_readv+0x150/0x150 [ 19.709665] [] compat_SyS_readv+0x26/0x30 [ 19.715427] [] ? SyS_pwritev2+0x80/0x80 [ 19.721016] [] do_fast_syscall_32+0x2f7/0x890 [ 19.727127] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.733769] [] entry_SYSENTER_compat+0x51/0x60 [ 19.739961] 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 [ 19.766370] RIP [] __free_pages+0x21/0x80 [ 19.772248] RSP [ 19.776507] ---[ end trace e0c82cf51f8b5ff4 ]--- [ 19.781253] Kernel panic - not syncing: Fatal exception [ 19.787038] Dumping ftrace buffer: [ 19.790567] (ftrace buffer empty) [ 19.794244] Kernel Offset: disabled [ 19.797835] Rebooting in 86400 seconds..