[ 10.625430] audit: type=1400 audit(1514540627.214:4): avc: denied { syslog } for pid=3189 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts. executing program executing program executing program executing program syzkaller login: [ 35.378289] kasan: CONFIG_KASAN_INLINE enabled [ 35.378978] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.380064] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.380886] Dumping ftrace buffer: [ 35.381359] (ftrace buffer empty) [ 35.381884] Modules linked in: [ 35.382352] CPU: 1 PID: 3358 Comm: syzkaller718182 Not tainted 4.9.72-gcb7518e #10 [ 35.383358] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.384576] task: ffff8801c9446000 task.stack: ffff8801c6828000 [ 35.385374] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 35.386523] RSP: 0018:ffff8801c682f990 EFLAGS: 00010a07 [ 35.387261] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 35.388238] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 35.389200] RBP: ffff8801c682f9a0 R08: ffffed003911aac4 R09: ffff8801c88d5600 [ 35.390150] R10: 0000000000000005 R11: ffffed003911aac4 R12: 0000000000000004 [ 35.391125] R13: 0000000000000020 R14: ffff8801c8d34200 R15: dffffc0000000000 [ 35.392095] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f77d7b40 [ 35.393213] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 35.393997] CR2: 0000000020ff4fe0 CR3: 00000001cd0d1000 CR4: 00000000001406e0 [ 35.394952] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.395915] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.396875] Stack: [ 35.397187] 0000000000000000 ffff8801c8d34358 ffff8801c682fa00 ffffffff82664fc1 [ 35.398343] ffff8801c8d34370 ffffed00391a686b ffffed00391a686e ffff8801c8d34368 [ 35.403787] dead4ead00000000 ffff8801c8d34340 0000000000000000 0000000000000000 [ 35.411733] Call Trace: [ 35.414287] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 35.420743] [] sg_finish_rem_req+0x2b5/0x340 [ 35.426765] [] sg_read+0xa1c/0x1440 [ 35.432010] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.438641] [] ? fsnotify+0xf30/0xf30 [ 35.444055] [] ? avc_policy_seqno+0x9/0x20 [ 35.449907] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 35.456885] [] ? security_file_permission+0x89/0x1e0 [ 35.463603] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.470230] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.476859] [] compat_do_readv_writev+0x522/0x760 [ 35.483314] [] ? do_pwritev+0x1a0/0x1a0 [ 35.488905] [] ? __lru_cache_add+0x187/0x250 [ 35.494932] [] ? __fget+0x201/0x3a0 [ 35.500170] [] ? __fget+0x228/0x3a0 [ 35.505411] [] ? __fget+0x47/0x3a0 [ 35.510566] [] compat_readv+0xe3/0x150 [ 35.516067] [] do_compat_readv+0xf4/0x1d0 [ 35.521828] [] ? compat_readv+0x150/0x150 [ 35.527589] [] compat_SyS_readv+0x26/0x30 [ 35.533355] [] ? SyS_pwritev2+0x80/0x80 [ 35.538944] [] do_fast_syscall_32+0x2f7/0x890 [ 35.545060] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.551690] [] entry_SYSENTER_compat+0x51/0x60 executing program [ 35.557883] 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 [ 35.584183] RIP [] __free_pages+0x21/0x80 [ 35.590070] RSP [ 35.593772] ---[ end trace 35e12980b8e04d55 ]--- [ 35.598542] Kernel panic - not syncing: Fatal exception [ 35.604239] Dumping ftrace buffer: [ 35.607745] (ftrace buffer empty) [ 35.611434] Kernel Offset: disabled [ 35.615032] Rebooting in 86400 seconds..