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-net-kasan-gce-5,10.128.0.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.122522] ------------[ cut here ]------------ [ 45.123328] kernel BUG at mm/slab.c:3256! [ 45.123929] invalid opcode: 0000 [#1] SMP KASAN [ 45.124660] Dumping ftrace buffer: [ 45.125132] (ftrace buffer empty) [ 45.125727] Modules linked in: [ 45.126235] CPU: 0 PID: 2946 Comm: syzkaller916108 Not tainted 4.13.0-rc7+ #35 [ 45.127241] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.128606] task: ffff8801d2bc60c0 task.stack: ffff8801c0c90000 [ 45.129573] RIP: 0010:____cache_alloc_node+0x1d4/0x1e0 [ 45.130453] RSP: 0018:ffff8801c0c97638 EFLAGS: 00010096 [ 45.131290] RAX: ffffffffffff8b7b RBX: 0000000001080220 RCX: 0000000000000000 [ 45.132346] RDX: 00000000ffff8b7b RSI: 0000000001080220 RDI: ffff8801dac00040 [ 45.133412] RBP: ffff8801c0c976c0 R08: 0000000000000000 R09: 0000000000000000 [ 45.134508] R10: ffff8801c0c97620 R11: 0000000000000001 R12: ffff8801dac00040 [ 45.135569] R13: ffff8801dac00040 R14: 0000000000000000 R15: 00000000ffff8b7b [ 45.136547] FS: 0000000002119940(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 45.137643] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.138417] CR2: 0000000020001fec CR3: 00000001d2980000 CR4: 00000000001406f0 [ 45.139370] Call Trace: [ 45.139726] ? kmem_cache_alloc_node_trace+0xe2/0x750 [ 45.140417] ? lookup_elem_raw+0x181/0x210 [ 45.141048] __kmalloc_node+0x33/0x70 [ 45.141557] alloc_htab_elem+0x2a8/0x480 [ 45.142139] htab_map_update_elem+0x740/0xb80 [ 45.142763] ? htab_percpu_map_update_elem+0x40/0x40 [ 45.148968] ? __might_sleep+0x95/0x190 [ 45.152914] ? rcutorture_record_progress+0x10/0x10 [ 45.157898] ? htab_percpu_map_update_elem+0x40/0x40 [ 45.162967] SyS_bpf+0x20c5/0x4c40 [ 45.166475] ? bpf_prog_get+0x20/0x20 [ 45.170247] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 45.175402] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 45.180561] ? perf_event_fork+0x30/0x30 [ 45.184593] ? __lock_is_held+0xb6/0x140 [ 45.188675] ? vma_wants_writenotify+0x51/0x3b0 [ 45.193316] ? check_noncircular+0x20/0x20 [ 45.197521] ? vma_wants_writenotify+0x3b0/0x3b0 [ 45.202263] ? vma_link+0xe9/0x170 [ 45.205775] ? mmap_region+0x52e/0x15a0 [ 45.209742] ? find_held_lock+0x35/0x1d0 [ 45.213791] ? check_noncircular+0x20/0x20 [ 45.218013] ? vm_mmap_pgoff+0x1ed/0x280 [ 45.222044] ? __handle_mm_fault+0x577/0x3860 [ 45.226511] ? check_noncircular+0x20/0x20 [ 45.230725] ? check_noncircular+0x20/0x20 [ 45.234926] ? __pmd_alloc+0x4e0/0x4e0 [ 45.238794] ? userfaultfd_unmap_prep+0x540/0x540 [ 45.243611] ? find_held_lock+0x35/0x1d0 [ 45.247645] ? handle_mm_fault+0x23e/0x860 [ 45.251855] ? find_held_lock+0x35/0x1d0 [ 45.255892] ? __do_page_fault+0x51b/0xb60 [ 45.260099] ? lock_downgrade+0x990/0x990 [ 45.264229] ? handle_mm_fault+0x4a2/0x860 [ 45.268437] ? down_read_trylock+0xdb/0x170 [ 45.272733] ? __handle_mm_fault+0x3860/0x3860 [ 45.277284] ? vmacache_find+0x61/0x270 [ 45.281227] ? vmacache_update+0xfe/0x130 [ 45.285349] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 45.290438] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.295163] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 45.299882] RIP: 0033:0x440409 [ 45.303041] RSP: 002b:00007ffd1f1792b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 45.310749] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440409 [ 45.318008] RDX: 0000000000000020 RSI: 0000000020006000 RDI: 0000000000000002 [ 45.325259] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 45.332507] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401d70 [ 45.339749] R13: 0000000000401e00 R14: 0000000000000000 R15: 0000000000000000 [ 45.346996] Code: 83 c2 01 89 50 18 4c 03 70 08 e8 38 f4 ff ff 4d 85 f6 0f 85 3e ff ff ff 44 89 fe 4c 89 ef e8 94 fb ff ff 49 89 c6 e9 2b ff ff ff <0f> 0b 0f 0b 0f 0b 66 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 [ 45.366085] RIP: ____cache_alloc_node+0x1d4/0x1e0 RSP: ffff8801c0c97638 [ 45.372807] ---[ end trace d745f355da2e33ce ]--- [ 45.377527] Kernel panic - not syncing: Fatal exception [ 45.383125] Dumping ftrace buffer: [ 45.386648] (ftrace buffer empty) [ 45.390325] Kernel Offset: disabled [ 45.393920] Rebooting in 86400 seconds..