netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'.
BUG: unable to handle kernel paging request at ffffffffffffffb0
PGD 9e6e067 P4D 9e6e067 PUD 9e70067 PMD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10180 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vsscanf+0x1c9/0x25a0 lib/vsprintf.c:2958
Code: 89 e9 48 c1 ea 03 4c 89 b4 24 80 00 00 00 83 e1 07 41 0f b6 45 00 42 0f b6 14 3a 4d 89 f4 38 ca 7f 08 84 d2 0f 85 f7 17 00 00 <0f> b6 5d 00 89 c7 88 44 24 08 89 de e8 66 1a 72 f9 0f b6 44 24 08
RSP: 0018:ffff88809fbcea68 EFLAGS: 00010246
RAX: 0000000000000076 RBX: 0000000000000076 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff87f06b87 RDI: 0000000000000001
RBP: ffffffffffffffb0 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801450cd81
R13: ffff88801450cd80 R14: ffff88801450cd81 R15: dffffc0000000000
FS: 00007fea61f1d700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffb0 CR3: 000000009f173000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
sscanf+0xbb/0xf0 lib/vsprintf.c:3212
__dev_alloc_name net/core/dev.c:1081 [inline]
dev_alloc_name_ns+0x1c4/0x440 net/core/dev.c:1115
dev_get_valid_name+0x67/0xe0 net/core/dev.c:1150
register_netdevice+0x267/0x10f0 net/core/dev.c:8654
veth_newlink+0x3eb/0x930 drivers/net/veth.c:1142
rtnl_newlink+0x1030/0x15c0 net/core/rtnetlink.c:3141
rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463
netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline]
netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351
netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg+0xc3/0x120 net/socket.c:661
___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227
__sys_sendmsg net/socket.c:2265 [inline]
__do_sys_sendmsg net/socket.c:2274 [inline]
__se_sys_sendmsg net/socket.c:2272 [inline]
__x64_sys_sendmsg+0x132/0x220 net/socket.c:2272
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fea635a80e9
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fea61f1d168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fea636baf60 RCX: 00007fea635a80e9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000005
RBP: 00007fea6360208d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdff8b236f R14: 00007fea61f1d300 R15: 0000000000022000
Modules linked in:
CR2: ffffffffffffffb0
---[ end trace a81d2869f8f1bf63 ]---
RIP: 0010:vsscanf+0x1c9/0x25a0 lib/vsprintf.c:2958
Code: 89 e9 48 c1 ea 03 4c 89 b4 24 80 00 00 00 83 e1 07 41 0f b6 45 00 42 0f b6 14 3a 4d 89 f4 38 ca 7f 08 84 d2 0f 85 f7 17 00 00 <0f> b6 5d 00 89 c7 88 44 24 08 89 de e8 66 1a 72 f9 0f b6 44 24 08
RSP: 0018:ffff88809fbcea68 EFLAGS: 00010246
RAX: 0000000000000076 RBX: 0000000000000076 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff87f06b87 RDI: 0000000000000001
RBP: ffffffffffffffb0 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801450cd81
R13: ffff88801450cd80 R14: ffff88801450cd81 R15: dffffc0000000000
FS: 00007fea61f1d700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffb0 CR3: 000000009f173000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 89 e9 mov %ebp,%ecx
2: 48 c1 ea 03 shr $0x3,%rdx
6: 4c 89 b4 24 80 00 00 mov %r14,0x80(%rsp)
d: 00
e: 83 e1 07 and $0x7,%ecx
11: 41 0f b6 45 00 movzbl 0x0(%r13),%eax
16: 42 0f b6 14 3a movzbl (%rdx,%r15,1),%edx
1b: 4d 89 f4 mov %r14,%r12
1e: 38 ca cmp %cl,%dl
20: 7f 08 jg 0x2a
22: 84 d2 test %dl,%dl
24: 0f 85 f7 17 00 00 jne 0x1821
* 2a: 0f b6 5d 00 movzbl 0x0(%rbp),%ebx <-- trapping instruction
2e: 89 c7 mov %eax,%edi
30: 88 44 24 08 mov %al,0x8(%rsp)
34: 89 de mov %ebx,%esi
36: e8 66 1a 72 f9 callq 0xf9721aa1
3b: 0f b6 44 24 08 movzbl 0x8(%rsp),%eax