BUG: unable to handle kernel paging request in nl802154_del_llsec

BUG: unable to handle kernel paging request in nl802154_del_llsec_key
Status: upstream: reported C repro on 2021/02/18 19:24
Reported-by: syzbot+ac5c11d2959a8b3c4806@syzkaller.appspotmail.com
First crash: 12d, last: 2h49m

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: general protection fault in nl802154_del_llsec_key (log)
Repro: C syz .config

Sample crash report:

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: 8430 Comm: syz-executor205 Not tainted 5.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:nla_len include/net/netlink.h:1148 [inline]
RIP: 0010:nla_parse_nested_deprecated include/net/netlink.h:1231 [inline]
RIP: 0010:nl802154_del_llsec_key+0x16d/0x320 net/ieee802154/nl802154.c:1595
Code: 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ab 01 00 00 48 8b 93 28 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 d1 48 c1 e9 03 <0f> b6 0c 01 48 89 d0 83 e0 07 83 c0 01 38 c8 7c 08 84 c9 0f 85 16
RSP: 0018:ffffc9000127f528 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8880205a8400 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff88892647 RDI: ffff8880205a8528
RBP: 1ffff9200024fea6 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8731625a R11: 0000000000000000 R12: ffff888143f16000
R13: ffff88801c450bd0 R14: ffffc9000127f8b0 R15: 0000000000000000
FS:  0000000000d0f300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000148 CR3: 00000000137b5000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 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:2494
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2345
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2399
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2432
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
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:00007ffe0109cee8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 000000000043fa69
RDX: 0000000000000810 RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 00000000004034d0 R08: 0000000000000008 R09: 00000000004004a0
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000403560
R13: 0000000000000000 R14: 00000000004ad018 R15: 00000000004004a0
Modules linked in:
---[ end trace b5b6e54712a1b280 ]---
RIP: 0010:nla_len include/net/netlink.h:1148 [inline]
RIP: 0010:nla_parse_nested_deprecated include/net/netlink.h:1231 [inline]
RIP: 0010:nl802154_del_llsec_key+0x16d/0x320 net/ieee802154/nl802154.c:1595
Code: 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ab 01 00 00 48 8b 93 28 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 d1 48 c1 e9 03 <0f> b6 0c 01 48 89 d0 83 e0 07 83 c0 01 38 c8 7c 08 84 c9 0f 85 16
RSP: 0018:ffffc9000127f528 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8880205a8400 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff88892647 RDI: ffff8880205a8528
RBP: 1ffff9200024fea6 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8731625a R11: 0000000000000000 R12: ffff888143f16000
R13: ffff88801c450bd0 R14: ffffc9000127f8b0 R15: 0000000000000000
FS:  0000000000d0f300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000148 CR3: 00000000137b5000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (78):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-net-this-kasan-gce	2021/02/20 10:08	net	3af409ca	f689d40a	.config	log	report	syz	C		general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/18 20:03	net	3af409ca	14052202	.config	log	report	syz	C		general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/20 15:43	net-next	38b5133a	3e5ed8b4	.config	log	report	syz	C		general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/18 20:28	net-next	38b5133a	14052202	.config	log	report	syz	C		general protection fault in nl802154_del_llsec_key
ci-qemu2-arm64	2021/02/24 01:11	upstream	3b9cdafb	fcc6d71b	.config	log	report			info	BUG: unable to handle kernel paging request in nl802154_del_llsec_key
ci-qemu2-arm64	2021/02/16 21:37	upstream	f40ddce8	98682e5e	.config	log	report			info	BUG: unable to handle kernel paging request in nl802154_del_llsec_key
ci-upstream-kasan-gce-smack-root	2021/02/26 06:08	upstream	29c395c7	76f7fc95	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-selinux-root	2021/02/25 23:04	upstream	29c395c7	76f7fc95	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-smack-root	2021/02/25 10:00	upstream	719bbd4a	fcc6d71b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-smack-root	2021/02/24 10:30	upstream	c03c21ba	fcc6d71b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-root	2021/02/22 03:48	upstream	55f62bc8	a659b3f1	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-smack-root	2021/02/22 03:27	upstream	55f62bc8	a659b3f1	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-selinux-root	2021/02/22 03:23	upstream	55f62bc8	a659b3f1	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-smack-root	2021/02/21 13:53	upstream	e767b353	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-smack-root	2021/02/21 13:20	upstream	e767b353	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-selinux-root	2021/02/21 13:17	upstream	e767b353	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-root	2021/02/21 03:16	upstream	f40ddce8	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-selinux-root	2021/02/20 15:51	upstream	f40ddce8	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-smack-root	2021/02/20 14:31	upstream	f40ddce8	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-smack-root	2021/02/20 02:16	upstream	f40ddce8	f689d40a	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-root	2021/02/20 02:14	upstream	f40ddce8	f689d40a	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-kasan-gce-selinux-root	2021/02/20 02:10	upstream	f40ddce8	f689d40a	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/28 08:59	net	eee7ede6	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/28 04:34	net	eee7ede6	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/27 08:12	net	eee7ede6	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/25 19:40	net	8f1c0fd2	76f7fc95	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/25 18:24	net	8f1c0fd2	76f7fc95	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/24 14:23	net	fcb30073	fcc6d71b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/22 03:15	net	d310ec03	a659b3f1	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/22 01:56	net	d310ec03	a659b3f1	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/21 13:12	net	3af409ca	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/21 00:46	net	3af409ca	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/20 14:35	net	3af409ca	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/20 07:16	net	3af409ca	f689d40a	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/20 02:21	net	3af409ca	f689d40a	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/20 02:16	net	3af409ca	f689d40a	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-this-kasan-gce	2021/02/18 19:34	net	3af409ca	14052202	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/28 20:19	net-next	d310ec03	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/28 18:13	net-next	d310ec03	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/28 16:11	net-next	d310ec03	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/28 05:42	net-next	d310ec03	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/27 13:35	net-next	d310ec03	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/27 02:07	net-next	d310ec03	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/26 23:28	net-next	d310ec03	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/26 16:15	net-next	d310ec03	4c37c133	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/26 09:55	net-next	d310ec03	76f7fc95	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/26 09:54	net-next	d310ec03	76f7fc95	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/25 12:18	net-next	d310ec03	fcc6d71b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/25 03:06	net-next	d310ec03	fcc6d71b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/25 02:00	net-next	d310ec03	fcc6d71b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/24 20:25	net-next	d310ec03	fcc6d71b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/24 18:29	net-next	d310ec03	fcc6d71b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/23 21:13	net-next	d310ec03	fcc6d71b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/23 18:12	net-next	d310ec03	fcc6d71b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/23 05:29	net-next	d310ec03	c26fb06b	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/21 06:35	net-next	38b5133a	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/21 02:11	net-next	38b5133a	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/21 00:32	net-next	38b5133a	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/20 18:10	net-next	38b5133a	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/20 14:15	net-next	38b5133a	3e5ed8b4	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/20 09:38	net-next	38b5133a	f689d40a	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/20 05:30	net-next	38b5133a	f689d40a	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/20 01:55	net-next	38b5133a	f689d40a	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/20 01:09	net-next	38b5133a	f689d40a	.config	log	report			info	general protection fault in nl802154_del_llsec_key
ci-upstream-net-kasan-gce	2021/02/17 03:56	net-next	966df6de	98682e5e	.config	log	report			info	general protection fault in nl802154_del_llsec_key