[....] Starting enhanced syslogd: rsyslogd[ 15.616787] audit: type=1400 audit(1519391958.860:4): avc: denied { syslog } for pid=3649 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 '10.128.0.5' (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 executing program executing program executing program executing program 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: [ 27.948646] kasan: CONFIG_KASAN_INLINE enabled [ 27.953248] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.960636] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.966845] Dumping ftrace buffer: [ 27.970355] (ftrace buffer empty) [ 27.974039] Modules linked in: [ 27.977324] CPU: 0 PID: 3807 Comm: syzkaller134716 Not tainted 4.9.83-g74659dc #41 [ 27.984999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program [ 27.994327] task: ffff8801d93c8000 task.stack: ffff8801d82c8000 [ 28.000351] RIP: 0010:[] [] sg_read+0xd06/0x1440 [ 28.008408] RSP: 0018:ffff8801d82cfa60 EFLAGS: 00010246 [ 28.013825] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8266ad2d [ 28.021066] RDX: 0000000000000000 RSI: 000000000000006c RDI: ffff8801d8864370 [ 28.028307] RBP: ffff8801d82cfb68 R08: 0000000000000000 R09: ffffed003ad9fe11 [ 28.035546] R10: 0000000000000005 R11: ffffed003ad9fe10 R12: 0000000000001000 executing program [ 28.042788] R13: 0000000000000000 R14: ffff8801d6cff060 R15: ffff8801d8864340 [ 28.050035] FS: 00007fab537f7700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 28.058229] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.064077] CR2: 00007fab537f6e78 CR3: 00000001da3a6000 CR4: 0000000000160670 [ 28.071315] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.078555] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.085793] Stack: [ 28.087913] ffff8801cfef40c0 ffff8801d82cfa90 ffff8801d8864358 ffff88010000006c executing program [ 28.095876] 0000000000000000 ffff8801d8864368 0000000000000090 0000000000000246 [ 28.103837] ffff8801cfe30a00 1ffff1003b059f58 00000000200001c0 00000000200001e4 [ 28.111801] Call Trace: [ 28.114359] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 28.121000] [] ? iov_iter_advance+0x216/0xd70 [ 28.127119] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 28.134104] [] ? security_file_permission+0x89/0x1e0 [ 28.140829] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 28.147468] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 28.154110] [] do_readv_writev+0x520/0x750 [ 28.159961] [] ? vfs_write+0x530/0x530 [ 28.165466] [] ? exit_robust_list+0x230/0x230 [ 28.171583] [] ? check_preemption_disabled+0x3b/0x200 [ 28.178390] [] ? __fget+0x20a/0x3b0 [ 28.183635] [] ? __fget+0x231/0x3b0 [ 28.188882] [] ? __fget+0x47/0x3b0 [ 28.194038] [] vfs_readv+0x84/0xc0 executing program [ 28.199197] [] do_readv+0xe6/0x250 [ 28.204356] [] ? vfs_readv+0xc0/0xc0 [ 28.209689] [] ? SyS_read+0x1b0/0x1b0 [ 28.215112] [] SyS_readv+0x27/0x30 [ 28.220272] [] ? rw_copy_check_uvector+0x2c0/0x2c0 [ 28.226819] [] do_syscall_64+0x1a4/0x490 [ 28.232502] [] entry_SYSCALL_64_after_swapgs+0x47/0xc5 executing program [ 28.239393] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 df 05 00 00 48 8b 1b 48 85 db 0f 84 51 03 00 [ 28.265893] RIP [] sg_read+0xd06/0x1440 [ 28.271600] RSP [ 28.275549] ---[ end trace 2ba7460fe94cc380 ]--- [ 28.278717] kasan: CONFIG_KASAN_INLINE enabled [ 28.278719] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.278727] general protection fault: 0000 [#2] PREEMPT SMP KASAN [ 28.278730] Dumping ftrace buffer: [ 28.278734] (ftrace buffer empty) [ 28.278737] Modules linked in: [ 28.278744] CPU: 1 PID: 3806 Comm: syzkaller134716 Tainted: G D 4.9.83-g74659dc #41 [ 28.278748] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.278751] task: ffff8801d91db000 task.stack: ffff8801b08a8000 [ 28.278764] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 28.278768] RSP: 0018:ffff8801b08af950 EFLAGS: 00010a07 [ 28.278772] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff826687fb [ 28.278776] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 28.278779] RBP: ffff8801b08af960 R08: 0000000000000001 R09: 0000000000000000 [ 28.278782] R10: 0000000000000000 R11: ffff8801d91db000 R12: 0000000000000004 [ 28.278786] R13: 0000000000000020 R14: ffff8801baa00000 R15: dffffc0000000000 [ 28.278791] FS: 00007fab53818700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 28.278795] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.278798] CR2: 00007fab5366ae78 CR3: 00000001da3a6000 CR4: 0000000000160670 [ 28.278805] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.278808] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.278809] Stack: [ 28.278819] ffff8801d91db000 ffff8801baa00158 ffff8801b08af9c0 ffffffff82668821 [ 28.278827] ffff8801baa00170 ffffed003754002b ffffed003754002e ffff8801baa00168 [ 28.278836] dead4ead00000000 ffff8801baa00140 0000000000000000 0000000000000000 [ 28.278837] Call Trace: [ 28.278846] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 28.278852] [] sg_finish_rem_req+0x2b5/0x340 [ 28.278859] [] sg_new_read.isra.20+0x39/0x3e0 [ 28.278865] [] ? sg_get_rq_mark+0x142/0x190 [ 28.278871] [] sg_read+0x8b7/0x1440 [ 28.278879] [] ? __check_object_size+0x174/0x3a9 [ 28.278885] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 28.278892] [] ? fsnotify+0xf30/0xf30 [ 28.278900] [] ? avc_policy_seqno+0x9/0x20 [ 28.278907] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 28.278914] [] ? security_file_permission+0x89/0x1e0 [ 28.278921] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 28.278927] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 28.278934] [] do_readv_writev+0x520/0x750 [ 28.278940] [] ? vfs_write+0x530/0x530 [ 28.278948] [] ? exit_robust_list+0x230/0x230 [ 28.278955] [] ? __fd_install+0x223/0x5f0 [ 28.278961] [] ? __fget+0x47/0x3b0 [ 28.278967] [] ? __fget+0x20a/0x3b0 [ 28.278973] [] ? __fget+0x231/0x3b0 [ 28.278978] [] ? __fget+0x47/0x3b0 [ 28.278985] [] vfs_readv+0x84/0xc0 [ 28.278991] [] do_readv+0xe6/0x250 [ 28.278998] [] ? vfs_readv+0xc0/0xc0 [ 28.279004] [] ? SyS_read+0x1b0/0x1b0 [ 28.279011] [] SyS_readv+0x27/0x30 [ 28.279018] [] ? rw_copy_check_uvector+0x2c0/0x2c0 [ 28.279025] [] do_syscall_64+0x1a4/0x490 [ 28.279033] [] entry_SYSCALL_64_after_swapgs+0x47/0xc5 [ 28.279130] 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 [ 28.279137] RIP [] __free_pages+0x21/0x80 [ 28.279139] RSP [ 28.279145] ---[ end trace 2ba7460fe94cc381 ]--- [ 28.279148] Kernel panic - not syncing: Fatal exception [ 28.280681] Dumping ftrace buffer: [ 28.280683] (ftrace buffer empty) [ 28.280686] Kernel Offset: disabled [ 28.665266] Rebooting in 86400 seconds..