[....] Starting enhanced syslogd: rsyslogd[ 10.406068] audit: type=1400 audit(1515633234.482:4): 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[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 '10.128.0.15' (ECDSA) to the list of known hosts. executing program executing program executing program executing program 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: [ 39.908836] kasan: CONFIG_KASAN_INLINE enabled [ 39.909727] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.910748] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.911423] kasan: CONFIG_KASAN_INLINE enabled [ 39.911425] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.913231] Dumping ftrace buffer: [ 39.913722] (ftrace buffer empty) [ 39.914357] Modules linked in: [ 39.914852] CPU: 0 PID: 3350 Comm: syzkaller041181 Not tainted 4.9.76-g9154940 #20 [ 39.915861] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.917079] task: ffff8801cbf4b000 task.stack: ffff8801c81b0000 [ 39.917873] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 39.919016] RSP: 0018:ffff8801c81b7940 EFLAGS: 00010a07 [ 39.919748] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff8266640b [ 39.920724] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 39.921702] RBP: ffff8801c81b7950 R08: 0000000000000001 R09: 0000000000000000 [ 39.922817] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 39.923838] R13: 0000000000000020 R14: ffff8801c8d0a100 R15: dffffc0000000000 [ 39.924803] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009bd7900 [ 39.925894] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 39.926666] CR2: 0000000020bb7000 CR3: 00000001c8190000 CR4: 0000000000160670 [ 39.927619] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.928568] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.933567] Stack: [ 39.935686] ffff8801cbf4b000 ffff8801c8d0a258 ffff8801c81b79b0 ffffffff82666431 [ 39.943627] ffff8801c8d0a270 ffffed00391a144b ffffed00391a144e ffff8801c8d0a268 [ 39.951577] dead4ead00000000 ffff8801c8d0a240 0000000000000000 0000000000000000 [ 39.959524] Call Trace: [ 39.962079] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 39.968553] [] sg_finish_rem_req+0x2b5/0x340 [ 39.974574] [] sg_new_read.isra.20+0x39/0x3e0 [ 39.980687] [] ? sg_get_rq_mark+0x142/0x190 [ 39.986624] [] sg_read+0x8bd/0x1440 [ 39.992386] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 39.999024] [] ? fsnotify+0xf30/0xf30 [ 40.004439] [] ? avc_policy_seqno+0x9/0x20 [ 40.011156] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 40.018486] [] ? security_file_permission+0x89/0x1e0 [ 40.025203] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 40.031840] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 40.038477] [] compat_do_readv_writev+0x522/0x760 [ 40.044933] [] ? do_pwritev+0x1a0/0x1a0 [ 40.050522] [] ? _raw_spin_unlock+0x2c/0x50 [ 40.056459] [] ? handle_mm_fault+0x6ee/0x2530 [ 40.063881] [] ? __pmd_alloc+0x410/0x410 [ 40.070084] [] compat_readv+0xe3/0x150 [ 40.075585] [] do_compat_readv+0xf4/0x1d0 [ 40.081350] [] ? compat_readv+0x150/0x150 [ 40.087111] [] compat_SyS_readv+0x26/0x30 [ 40.092874] [] ? SyS_pwritev2+0x80/0x80 [ 40.098467] [] do_fast_syscall_32+0x2f7/0x890 executing program executing program executing program [ 40.104583] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.111216] [] entry_SYSENTER_compat+0x74/0x83 [ 40.117414] 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 [ 40.145765] RIP [] __free_pages+0x21/0x80 [ 40.151652] RSP executing program executing program executing program executing program executing program [ 40.155254] general protection fault: 0000 [#2] PREEMPT SMP KASAN [ 40.161491] Dumping ftrace buffer: [ 40.165002] (ftrace buffer empty) [ 40.166776] ---[ end trace 65b43d3fbf139b2e ]--- [ 40.166780] Kernel panic - not syncing: Fatal exception [ 40.179497] Modules linked in: [ 40.182774] CPU: 1 PID: 3347 Comm: syzkaller041181 Tainted: G D 4.9.76-g9154940 #20 [ 40.191677] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.201006] task: ffff8801ca9fe000 task.stack: ffff8801c8210000 [ 40.207038] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 40.215278] RSP: 0018:ffff8801c8217940 EFLAGS: 00010a07 [ 40.220705] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff8266640b [ 40.228123] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 40.235706] RBP: ffff8801c8217950 R08: 0000000000000001 R09: 0000000000000000 [ 40.242942] R10: 0000000000000000 R11: ffff8801ca9fe000 R12: 0000000000000004 [ 40.250184] R13: 0000000000000020 R14: ffff8801c8258000 R15: dffffc0000000000 [ 40.257423] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009bd7900 [ 40.265616] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 40.271482] CR2: 0000000020bb7000 CR3: 00000001c98da000 CR4: 0000000000160670 [ 40.281077] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.291020] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.299816] Stack: [ 40.301932] ffff8801ca9fe000 ffff8801c8258158 ffff8801c82179b0 ffffffff82666431 [ 40.309886] ffff8801c8258170 ffffed003904b02b ffffed003904b02e ffff8801c8258168 [ 40.317830] dead4ead00000000 ffff8801c8258140 0000000000000000 0000000000000000 [ 40.325784] Call Trace: [ 40.328338] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 40.334895] [] sg_finish_rem_req+0x2b5/0x340 [ 40.340917] [] sg_new_read.isra.20+0x39/0x3e0 [ 40.347040] [] ? sg_get_rq_mark+0x142/0x190 [ 40.353414] [] sg_read+0x8bd/0x1440 [ 40.358671] [] ? kasan_unpoison_shadow+0x35/0x50 [ 40.365055] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 40.371779] [] ? fsnotify+0xf30/0xf30 [ 40.377197] [] ? avc_policy_seqno+0x9/0x20 [ 40.383073] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 40.390093] [] ? security_file_permission+0x89/0x1e0 [ 40.396819] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 40.404335] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 40.410977] [] compat_do_readv_writev+0x522/0x760 [ 40.417526] [] ? do_pwritev+0x1a0/0x1a0 [ 40.423118] [] ? _raw_spin_unlock+0x2c/0x50 [ 40.429058] [] ? handle_mm_fault+0x6ee/0x2530 [ 40.435167] [] ? __pmd_alloc+0x410/0x410 [ 40.440841] [] ? fsnotify+0x86/0xf30 [ 40.446167] [] ? fsnotify+0xf30/0xf30 [ 40.451580] [] compat_readv+0xe3/0x150 [ 40.457174] [] do_compat_readv+0xf4/0x1d0 [ 40.464238] [] ? compat_readv+0x150/0x150 [ 40.469998] [] compat_SyS_readv+0x26/0x30 [ 40.475764] [] ? SyS_pwritev2+0x80/0x80 [ 40.481362] [] do_fast_syscall_32+0x2f7/0x890 [ 40.487902] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.494531] [] entry_SYSENTER_compat+0x74/0x83 [ 40.500723] 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 [ 40.527599] RIP [] __free_pages+0x21/0x80 [ 40.533475] RSP [ 40.537097] Dumping ftrace buffer: [ 40.540651] (ftrace buffer empty) [ 40.544333] Kernel Offset: disabled [ 40.547926] Rebooting in 86400 seconds..