general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 PID: 5307 Comm: syz-executor.3 Not tainted 5.6.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ethnl_parse_header+0x522/0x840 include/linux/string.h:381
Code: ea 03 80 3c 02 00 0f 85 1d 03 00 00 4d 89 7d 08 e8 d3 70 2d fb 49 8d 7d 10 48 ba 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <0f> b6 0c 10 49 8d 45 13 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 fe
RSP: 0018:ffffc900016f74d8 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffff8880a8dfe848 RCX: ffffc90010438000
RDX: dffffc0000000000 RSI: ffffffff8644a4ed RDI: 0000000000000010
RBP: ffff8880a3b79000 R08: ffff888096824200 R09: ffffc900016f7510
R10: fffff520002deea5 R11: ffffc900016f752f R12: 1ffff920002dee9e
R13: 0000000000000000 R14: ffff888065978100 R15: ffff8880a8dfe84c
FS:  00007ff77b5d3700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000076c000 CR3: 0000000061232000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ethnl_default_parse+0x1c1/0x300 net/ethtool/netlink.c:264
 ethnl_default_start+0x1ed/0x4d0 net/ethtool/netlink.c:492
 __netlink_dump_start+0x58a/0x910 net/netlink/af_netlink.c:2343
 genl_family_rcv_msg_dumpit net/netlink/genetlink.c:630 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:715 [inline]
 genl_rcv_msg+0xa32/0xdf0 net/netlink/genetlink.c:735
 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:746
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6b9/0x7d0 net/socket.c:2343
 ___sys_sendmsg+0x100/0x170 net/socket.c:2397
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2430
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff77b5d2c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff77b5d36d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000020006440 RDI: 0000000000000003
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000900 R14: 00000000004d55f8 R15: 000000000076bfac
Modules linked in:
---[ end trace cd197b5dc8a9ca62 ]---
RIP: 0010:ethnl_parse_header+0x522/0x840 include/linux/string.h:381
Code: ea 03 80 3c 02 00 0f 85 1d 03 00 00 4d 89 7d 08 e8 d3 70 2d fb 49 8d 7d 10 48 ba 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <0f> b6 0c 10 49 8d 45 13 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 fe
RSP: 0018:ffffc900016f74d8 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffff8880a8dfe848 RCX: ffffc90010438000
RDX: dffffc0000000000 RSI: ffffffff8644a4ed RDI: 0000000000000010
RBP: ffff8880a3b79000 R08: ffff888096824200 R09: ffffc900016f7510
R10: fffff520002deea5 R11: ffffc900016f752f R12: 1ffff920002dee9e
R13: 0000000000000000 R14: ffff888065978100 R15: ffff8880a8dfe84c
FS:  00007ff77b5d3700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbdd3601000 CR3: 0000000061232000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400