netlink: 20 bytes leftover after parsing attributes in process `syz-executor.2'. INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 0 PID: 25940 Comm: syz-executor.5 Not tainted 4.14.267-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 register_lock_class+0x389/0x1180 kernel/locking/lockdep.c:768 __lock_acquire+0x167/0x3f20 kernel/locking/lockdep.c:3378 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 ieee802154_add_llsec_key+0x44/0x80 net/mac802154/cfg.c:343 rdev_add_llsec_key net/ieee802154/rdev-ops.h:260 [inline] nl802154_add_llsec_key+0x396/0x4f0 net/ieee802154/nl802154.c:1619 genl_family_rcv_msg+0x572/0xb20 net/netlink/genetlink.c:600 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2446 genl_rcv+0x24/0x40 net/netlink/genetlink.c:636 netlink_unicast_kernel net/netlink/af_netlink.c:1294 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1320 netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fa04d1eb059 RSP: 002b:00007fa04bb60168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa04d2fdf60 RCX: 00007fa04d1eb059 RDX: 0000000000000000 RSI: 0000000020000680 RDI: 0000000000000004 RBP: 00007fa04d24508d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd055eee9f R14: 00007fa04bb60300 R15: 0000000000022000 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 25940 Comm: syz-executor.5 Not tainted 4.14.267-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808da58600 task.stack: ffff888095588000 RIP: 0010:llsec_key_id_equal+0x22/0x390 net/mac802154/llsec.c:199 RSP: 0018:ffff88809558f510 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffc90007408000 RDX: 0000000000000002 RSI: ffffffff86df53c1 RDI: 0000000000000010 RBP: ffff88809558f650 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: ffff88808da58600 R12: ffff88809558f650 R13: ffff88809558f690 R14: ffff88808bc19fa0 R15: dffffc0000000000 FS: 00007fa04bb60700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f35e8751718 CR3: 00000000a8b11000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mac802154_llsec_key_add+0x114/0xa40 net/mac802154/llsec.c:232 ieee802154_add_llsec_key+0x56/0x80 net/mac802154/cfg.c:344 rdev_add_llsec_key net/ieee802154/rdev-ops.h:260 [inline] nl802154_add_llsec_key+0x396/0x4f0 net/ieee802154/nl802154.c:1619 genl_family_rcv_msg+0x572/0xb20 net/netlink/genetlink.c:600 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2446 genl_rcv+0x24/0x40 net/netlink/genetlink.c:636 netlink_unicast_kernel net/netlink/af_netlink.c:1294 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1320 netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fa04d1eb059 RSP: 002b:00007fa04bb60168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa04d2fdf60 RCX: 00007fa04d1eb059 RDX: 0000000000000000 RSI: 0000000020000680 RDI: 0000000000000004 RBP: 00007fa04d24508d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd055eee9f R14: 00007fa04bb60300 R15: 0000000000022000 Code: 89 e0 41 5c c3 0f 1f 40 00 41 55 41 54 55 48 89 f5 53 48 89 fb e8 3f ef 75 fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 31 02 00 00 48 89 ea 44 0f b6 23 RIP: llsec_key_id_equal+0x22/0x390 net/mac802154/llsec.c:199 RSP: ffff88809558f510 ---[ end trace de1dffc3a10206e1 ]--- ---------------- Code disassembly (best guess): 0: 89 e0 mov %esp,%eax 2: 41 5c pop %r12 4: c3 retq 5: 0f 1f 40 00 nopl 0x0(%rax) 9: 41 55 push %r13 b: 41 54 push %r12 d: 55 push %rbp e: 48 89 f5 mov %rsi,%rbp 11: 53 push %rbx 12: 48 89 fb mov %rdi,%rbx 15: e8 3f ef 75 fa callq 0xfa75ef59 1a: 48 89 da mov %rbx,%rdx 1d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 24: fc ff df 27: 48 c1 ea 03 shr $0x3,%rdx * 2b: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 74 06 je 0x39 33: 0f 8e 31 02 00 00 jle 0x26a 39: 48 89 ea mov %rbp,%rdx 3c: 44 0f b6 23 movzbl (%rbx),%r12d