general protection fault in tipc_crypto_key

general protection fault in tipc_crypto_key_distr
Status: upstream: reported on 2020/12/23 11:13
Reported-by: syzbot+fff41d21ca02315bd004@syzkaller.appspotmail.com
First crash: 315d, last: 15h35m

Sample crash report:

RBP: 00007ff38eedb1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ff391f9cb2f R14: 00007ff38eedb300 R15: 0000000000022000
general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 0 PID: 18916 Comm: syz-executor.1 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tipc_aead_key_size include/uapi/linux/tipc.h:254 [inline]
RIP: 0010:tipc_crypto_key_xmit net/tipc/crypto.c:2242 [inline]
RIP: 0010:tipc_crypto_key_distr+0x218/0xa80 net/tipc/crypto.c:2208
Code: 02 00 0f 85 66 08 00 00 48 8b 45 00 49 8d 4d 20 48 89 ca 48 89 4c 24 10 48 c1 ea 03 48 89 04 24 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b0
RSP: 0018:ffffc900058973f0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880809e6a00 RCX: 0000000000000020
RDX: 0000000000000004 RSI: ffffffff88b15a27 RDI: ffff8880809e6a40
RBP: ffff888071dc7400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000038
FS:  00007ff38eedb700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa5642b1558 CR3: 000000008370d000 CR4: 00000000003506f0
Call Trace:
 __tipc_nl_node_set_key net/tipc/node.c:3018 [inline]
 tipc_nl_node_set_key+0xa95/0xf70 net/tipc/node.c:3033
 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731
 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
 genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2510
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1935
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:724
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff391965a39
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff38eedb188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff391a68f60 RCX: 00007ff391965a39
RDX: 0000000000000000 RSI: 0000000020000640 RDI: 0000000000000003
RBP: 00007ff38eedb1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ff391f9cb2f R14: 00007ff38eedb300 R15: 0000000000022000
Modules linked in:
---[ end trace 04baf60ebd497a04 ]---
RIP: 0010:tipc_aead_key_size include/uapi/linux/tipc.h:254 [inline]
RIP: 0010:tipc_crypto_key_xmit net/tipc/crypto.c:2242 [inline]
RIP: 0010:tipc_crypto_key_distr+0x218/0xa80 net/tipc/crypto.c:2208
Code: 02 00 0f 85 66 08 00 00 48 8b 45 00 49 8d 4d 20 48 89 ca 48 89 4c 24 10 48 c1 ea 03 48 89 04 24 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b0
RSP: 0018:ffffc900058973f0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880809e6a00 RCX: 0000000000000020
RDX: 0000000000000004 RSI: ffffffff88b15a27 RDI: ffff8880809e6a40
RBP: ffff888071dc7400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000038
FS:  00007ff38eedb700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ed23000 CR3: 000000008370d000 CR4: 00000000003506f0
----------------
Code disassembly (best guess):
   0:	02 00                	add    (%rax),%al
   2:	0f 85 66 08 00 00    	jne    0x86e
   8:	48 8b 45 00          	mov    0x0(%rbp),%rax
   c:	49 8d 4d 20          	lea    0x20(%r13),%rcx
  10:	48 89 ca             	mov    %rcx,%rdx
  13:	48 89 4c 24 10       	mov    %rcx,0x10(%rsp)
  18:	48 c1 ea 03          	shr    $0x3,%rdx
  1c:	48 89 04 24          	mov    %rax,(%rsp)
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx <-- trapping instruction
  2e:	48 89 c8             	mov    %rcx,%rax
  31:	83 e0 07             	and    $0x7,%eax
  34:	83 c0 03             	add    $0x3,%eax
  37:	38 d0                	cmp    %dl,%al
  39:	7c 08                	jl     0x43
  3b:	84 d2                	test   %dl,%dl
  3d:	0f                   	.byte 0xf
  3e:	85                   	.byte 0x85
  3f:	b0                   	.byte 0xb0

Crashes (12):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce	2021/10/27 23:55	upstream	d25f27432f80	373bf66b	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-kasan-gce	2021/10/16 10:59	upstream	8fe31e0995f0	0c5d9412	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-kasan-gce	2021/09/29 13:19	upstream	a4e6f95a891a	d82cb927	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-kasan-gce	2021/09/02 04:03	upstream	835d31d319d9	7eb7e152	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-kasan-gce	2021/08/12 19:22	upstream	1746f4db5135	6972b106	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-kasan-gce-root	2021/07/25 16:17	upstream	6498f6151825	4d1b57d4	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-kasan-gce-root	2021/07/06 10:46	upstream	3dbdb38e2869	6c4484eb	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-net-this-kasan-gce	2021/10/17 02:41	net	fac3cb82a54a	0c5d9412	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-net-this-kasan-gce	2021/06/05 06:06	net	3822d0670c9d	500c2339	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-net-this-kasan-gce	2021/02/06 01:23	net	b3d2c7b876d4	23a562df	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-net-kasan-gce	2021/10/02 13:46	net-next	20ab39d13e2e	db0f5787	.config	log	report	info	general protection fault in tipc_crypto_key_distr
ci-upstream-net-kasan-gce	2020/12/17 04:39	net-next	3db1a3fa9880	04201c06	.config	log	report	info