general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 8394 Comm: syz-executor571 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:nla_get_u16 include/net/netlink.h:1581 [inline] RIP: 0010:nla_get_shortaddr net/ieee802154/nl-mac.c:48 [inline] RIP: 0010:ieee802154_llsec_parse_key_id+0x17f/0x8a0 net/ieee802154/nl-mac.c:559 Code: 00 00 4d 8b 66 30 4d 85 e4 0f 84 1e 05 00 00 e8 37 1b e2 f8 49 8d 7c 24 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 4e RSP: 0018:ffffc9000163f4a0 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: ffffc9000163f5a8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8891db19 RDI: 0000000000000004 RBP: ffffc9000163f680 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff8891dad6 R11: 0000000000000000 R12: 0000000000000000 R13: 1ffff920002c7e94 R14: ffff88802166fc00 R15: ffffc9000163f6a0 FS: 0000000000636300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000024c CR3: 000000001ca6f000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: llsec_del_devkey net/ieee802154/nl-mac.c:1138 [inline] ieee802154_nl_llsec_change net/ieee802154/nl-mac.c:824 [inline] ieee802154_llsec_del_devkey+0x169/0x370 net/ieee802154/nl-mac.c:1148 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x43fa69 Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd92ddd218 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 000000000043fa69 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00000000004034d0 R08: 0000000000000004 R09: 00000000004004a0 R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000403560 R13: 0000000000000000 R14: 00000000004ad018 R15: 00000000004004a0 Modules linked in: ---[ end trace fe02222777fce37d ]--- RIP: 0010:nla_get_u16 include/net/netlink.h:1581 [inline] RIP: 0010:nla_get_shortaddr net/ieee802154/nl-mac.c:48 [inline] RIP: 0010:ieee802154_llsec_parse_key_id+0x17f/0x8a0 net/ieee802154/nl-mac.c:559 Code: 00 00 4d 8b 66 30 4d 85 e4 0f 84 1e 05 00 00 e8 37 1b e2 f8 49 8d 7c 24 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 4e RSP: 0018:ffffc9000163f4a0 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: ffffc9000163f5a8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8891db19 RDI: 0000000000000004 RBP: ffffc9000163f680 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff8891dad6 R11: 0000000000000000 R12: 0000000000000000 R13: 1ffff920002c7e94 R14: ffff88802166fc00 R15: ffffc9000163f6a0 FS: 0000000000636300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd68379a6c0 CR3: 000000001ca6f000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400