------------[ cut here ]------------ kernel BUG at mm/slab.c:4427! dlm: non-version read from control device 8 invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 11058 Comm: syz-executor.0 Not tainted 4.14.139 #35 kobject: 'kvm' (ffff8880a6e72250): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809311a540 task.stack: ffff88805c988000 RIP: 0010:__check_heap_object+0x58/0x5a mm/slab.c:4427 RSP: 0018:ffff88805c98fbc0 EFLAGS: 00010293 RAX: 00000000000f0f0f RBX: 0000000000000711 RCX: 000000000000000c RDX: 00000000e1e1e1df RSI: 0000000000000711 RDI: ffff88809eaec0bd RBP: ffff88805c98fc00 R08: ffff8880aa800dc0 R09: ffff88809eaec0c0 R10: ffff88821fff8010 R11: 0000000000000001 R12: ffff88809eaec0bd R13: ffffea00027abb00 R14: 0000000000000001 R15: ffffea00027abb00 FS: 00007fa6ff879700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f122000 CR3: 000000008faa4000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_object_size include/linux/thread_info.h:108 [inline] check_copy_size include/linux/thread_info.h:139 [inline] copy_to_user include/linux/uaccess.h:154 [inline] bpf_test_finish.isra.0+0x9a/0x150 net/bpf/test_run.c:59 kobject: 'kvm' (ffff8880a6e72250): fill_kobj_path: path = '/devices/virtual/misc/kvm' bpf_prog_test_run_skb+0x5af/0x9a0 net/bpf/test_run.c:144 bpf_prog_test_run kernel/bpf/syscall.c:1258 [inline] SYSC_bpf kernel/bpf/syscall.c:1520 [inline] SyS_bpf+0x749/0x38f3 kernel/bpf/syscall.c:1469 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459829 RSP: 002b:00007fa6ff878c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000000000028 RSI: 00000000200002c0 RDI: 000000000000000a RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa6ff8796d4 R13: 00000000004bfb92 R14: 00000000004d1818 R15: 00000000ffffffff Code: e8 41 39 40 24 76 24 41 0f af 40 14 4c 01 c8 48 29 c7 49 63 40 74 48 39 f8 72 08 48 29 f8 48 39 f0 73 05 49 8b 40 58 c3 31 c0 c3 <0f> 0b 44 89 e9 48 c7 c7 30 d6 41 87 89 75 d4 4c 8d 45 cc 81 e1 RIP: __check_heap_object+0x58/0x5a mm/slab.c:4427 RSP: ffff88805c98fbc0 kobject: 'loop5' (ffff8880a4aa5260): kobject_uevent_env ---[ end trace 79ed0fca13df9dc8 ]--- kobject: 'loop5' (ffff8880a4aa5260): fill_kobj_path: path = '/devices/virtual/block/loop5'