general protection fault in ieee802154_llsec_parse_key

general protection fault in ieee802154_llsec_parse_key_id
Status: upstream: reported C repro on 2021/02/22 09:24
Reported-by: syzbot+d4c07de0144f6f63be3a@syzkaller.appspotmail.com
First crash: 9d06h, last: 18h28m

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: general protection fault in ieee802154_llsec_parse_key_id (log)
Repro: C syz .config

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	general protection fault in ieee802154_llsec_parse_key_id				9	18h33m	6d22h	0/1	upstream: reported on 2021/02/22 00:37
linux-4.14	general protection fault in ieee802154_llsec_parse_key_id	C			27	3h08m	9d06h	0/1	upstream: reported C repro on 2021/02/19 16:28

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: 0 PID: 8431 Comm: syz-executor292 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_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 a7 16 e8 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:ffffc900017ff4f0 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: ffffc900017ff5a8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff888ad1e9 RDI: 0000000000000004
RBP: ffffc900017ff680 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff888ad1a6 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff920002ffe9e R14: ffff888025b7c400 R15: ffffffff8da591f8
FS:  00000000008e1300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000030c CR3: 000000001cb7a000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 llsec_remove_key net/ieee802154/nl-mac.c:896 [inline]
 ieee802154_nl_llsec_change net/ieee802154/nl-mac.c:824 [inline]
 ieee802154_llsec_del_key+0x109/0x240 net/ieee802154/nl-mac.c:904
 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:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2348
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2402
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2435
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x43fa99
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:00007ffce4fc0e98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 000000000043fa99
RDX: 0000000000004054 RSI: 0000000020000440 RDI: 0000000000000004
RBP: 0000000000403500 R08: 00000000ffffffff R09: 00000000004004a0
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000403590
R13: 0000000000000000 R14: 00000000004ad018 R15: 00000000004004a0
Modules linked in:
---[ end trace 32b0ca68504d0ad5 ]---
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 a7 16 e8 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:ffffc900017ff4f0 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: ffffc900017ff5a8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff888ad1e9 RDI: 0000000000000004
RBP: ffffc900017ff680 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff888ad1a6 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff920002ffe9e R14: ffff888025b7c400 R15: ffffffff8da591f8
FS:  00000000008e1300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055bf74e6f0b8 CR3: 000000001cb7a000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (13):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-net-kasan-gce	2021/02/19 17:25	net-next	38b5133a	f689d40a	.config	log	report	syz	C		general protection fault in ieee802154_llsec_parse_key_id
ci-upstream-kasan-gce-smack-root	2021/02/20 15:41	upstream	f40ddce8	3e5ed8b4	.config	log	report			info	general protection fault in ieee802154_llsec_parse_key_id
ci-upstream-net-this-kasan-gce	2021/02/25 19:15	net	8f1c0fd2	76f7fc95	.config	log	report			info	general protection fault in ieee802154_llsec_parse_key_id
ci-upstream-net-kasan-gce	2021/02/26 23:42	net-next	d310ec03	4c37c133	.config	log	report			info	general protection fault in ieee802154_llsec_parse_key_id
ci-upstream-net-kasan-gce	2021/02/26 12:01	net-next	d310ec03	76f7fc95	.config	log	report			info	general protection fault in ieee802154_llsec_parse_key_id
ci-upstream-net-kasan-gce	2021/02/25 17:07	net-next	d310ec03	76f7fc95	.config	log	report			info	general protection fault in ieee802154_llsec_parse_key_id
ci-upstream-net-kasan-gce	2021/02/24 20:59	net-next	d310ec03	fcc6d71b	.config	log	report			info	general protection fault in ieee802154_llsec_parse_key_id
ci-upstream-net-kasan-gce	2021/02/21 07:08	net-next	38b5133a	3e5ed8b4	.config	log	report			info	general protection fault in ieee802154_llsec_parse_key_id
ci-upstream-linux-next-kasan-gce-root	2021/02/27 12:51	linux-next	d01f2f7e	4c37c133	.config	log	report			info	general protection fault in ieee802154_llsec_parse_key_id
ci-upstream-kasan-gce-selinux-root	2021/02/28 04:58	upstream	5695e516	4c37c133	.config	log	report			info	KASAN: null-ptr-deref Read in ieee802154_llsec_parse_key_id
ci-upstream-kasan-gce-root	2021/02/25 13:59	upstream	062c84fc	fcc6d71b	.config	log	report			info	KASAN: null-ptr-deref Read in ieee802154_llsec_parse_key_id
ci-upstream-net-kasan-gce	2021/02/20 03:44	net-next	38b5133a	f689d40a	.config	log	report			info	KASAN: null-ptr-deref Read in ieee802154_llsec_parse_key_id
ci-upstream-linux-next-kasan-gce-root	2021/02/24 13:24	linux-next	577c2835	fcc6d71b	.config	log	report			info	KASAN: null-ptr-deref Read in ieee802154_llsec_parse_key_id