INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?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-upstream-next-kasan-gce-6,10.128.15.200' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 46.116169] kasan: CONFIG_KASAN_INLINE enabled [ 46.120887] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 46.128545] general protection fault: 0000 [#1] SMP KASAN [ 46.134075] Dumping ftrace buffer: [ 46.137582] (ftrace buffer empty) [ 46.141259] Modules linked in: [ 46.144425] CPU: 0 PID: 8085 Comm: syzkaller352453 Not tainted 4.13.0-next-20170905+ #15 [ 46.152623] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.161945] task: ffff8801c35125c0 task.stack: ffff8801c0340000 [ 46.167976] RIP: 0010:__list_add_valid+0x46/0xd0 [ 46.172698] RSP: 0018:ffff8801c03473d0 EFLAGS: 00010246 [ 46.178028] RAX: dffffc0000000000 RBX: ffff8801c4b8e768 RCX: 0000000000000000 [ 46.185268] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801c4b8e770 [ 46.192511] RBP: ffff8801c03473e8 R08: 0000000000000000 R09: 1ffff10038068ddc [ 46.199842] R10: 0000000011024d81 R11: 00000000a5f4a619 R12: ffff8801c39f1880 [ 46.207081] R13: ffff8801c5192000 R14: ffff8801c4b8e768 R15: 0000000000000000 [ 46.214320] FS: 00007f980ac79700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 46.222521] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.228371] CR2: 0000000020eb1000 CR3: 00000001c669b000 CR4: 00000000001406f0 [ 46.235613] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.242862] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.250103] Call Trace: [ 46.252666] sock_map_ctx_update_elem.isra.11+0x9e9/0x1a00 [ 46.258273] ? sock_map_free+0x870/0x870 [ 46.262306] ? lock_downgrade+0x990/0x990 [ 46.266437] ? __fget+0xbb/0x580 [ 46.269793] ? lock_release+0xd70/0xd70 [ 46.273746] ? __fget+0x362/0x580 [ 46.277174] ? iterate_fd+0x3f0/0x3f0 [ 46.280953] ? retint_kernel+0x10/0x10 [ 46.284814] ? fget+0x18/0x20 [ 46.287908] sock_map_update_elem+0x145/0x2d0 [ 46.292382] ? bpf_sock_map_update+0x50/0x50 [ 46.296765] ? rcutorture_record_progress+0x10/0x10 [ 46.301754] ? copy_user_generic_unrolled+0x9e/0xc0 [ 46.306744] ? bpf_sock_map_update+0x50/0x50 [ 46.311139] SyS_bpf+0x20cb/0x4c50 [ 46.314653] ? bpf_prog_get+0x20/0x20 [ 46.318442] ? lock_downgrade+0x990/0x990 [ 46.322561] ? lru_cache_add_active_or_unevictable+0x20e/0x540 [ 46.328501] ? add_page_to_unevictable_list+0x730/0x730 [ 46.333849] ? __handle_mm_fault+0x2780/0x39c0 [ 46.338404] ? do_raw_spin_trylock+0x190/0x190 [ 46.342972] ? check_noncircular+0x20/0x20 [ 46.347185] ? _raw_spin_unlock+0x22/0x30 [ 46.351300] ? __handle_mm_fault+0x587/0x39c0 [ 46.355769] ? __pmd_alloc+0x4e0/0x4e0 [ 46.359649] ? find_held_lock+0x39/0x1d0 [ 46.363685] ? lock_downgrade+0x990/0x990 [ 46.367813] ? handle_mm_fault+0x4a2/0x860 [ 46.372017] ? down_read_trylock+0xdb/0x170 [ 46.376308] ? __handle_mm_fault+0x39c0/0x39c0 [ 46.380860] ? vmacache_find+0x61/0x270 [ 46.384817] ? up_read+0x1a/0x40 [ 46.388162] ? __do_page_fault+0x35b/0xb60 [ 46.392370] ? do_page_fault+0xee/0x720 [ 46.396320] ? __do_page_fault+0xb60/0xb60 [ 46.400541] ? lockdep_sys_exit+0x47/0xf0 [ 46.404675] ? syscall_return_slowpath+0x2b3/0x500 [ 46.409573] ? finish_task_switch+0x4c9/0x740 [ 46.414071] ? lockdep_sys_exit+0x47/0xf0 [ 46.418187] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 46.423001] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 46.427739] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 46.432465] RIP: 0033:0x445cb9 [ 46.435627] RSP: 002b:00007f980ac78dc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000141 [ 46.443302] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445cb9 [ 46.450542] RDX: 0000000000000020 RSI: 00000000204eefe0 RDI: 0000000000000002 [ 46.457781] RBP: 0000000000000082 R08: 00007f980ac79700 R09: 00007f980ac79700 [ 46.465021] R10: 00007f980ac79700 R11: 0000000000000202 R12: 0000000000000000 [ 46.472261] R13: 00007ffddb3c29ff R14: 00007f980ac799c0 R15: 0000000000000000 [ 46.479688] Code: 48 89 fa 48 83 ec 08 48 c1 ea 03 80 3c 02 00 75 7c 48 8b 53 08 48 39 f2 75 37 48 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 75 6e 48 8b 16 48 39 da 75 29 49 39 f4 74 38 49 39 [ 46.498793] RIP: __list_add_valid+0x46/0xd0 RSP: ffff8801c03473d0 [ 46.505034] ---[ end trace 174e6c5e63bab036 ]--- [ 46.509804] Kernel panic - not syncing: Fatal exception in interrupt [ 46.516739] Dumping ftrace buffer: [ 46.520273] (ftrace buffer empty) [ 46.523950] Kernel Offset: disabled [ 46.527544] Rebooting in 86400 seconds..