general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 1 PID: 14291 Comm: syz-executor.3 Not tainted 6.2.0-rc4-syzkaller-00839-gc554520f2cbe #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:pause_prepare_data+0x60/0x400 net/ethtool/pause.c:59
Code: 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 02 03 00 00 48 8d 7d 40 45 8b 6c 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 14 03 00 00 48 8b 45 40 48 89 da 48 c1 ea 03 48
RSP: 0018:ffffc900151a7880 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88801f245980 RCX: ffffc9000ccf2000
RDX: 0000000000000008 RSI: ffffffff88074170 RDI: 0000000000000040
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88801f245980
R10: ffffed1003e48b35 R11: 0000000000000000 R12: ffff8880295ab280
R13: 0000000000000000 R14: ffff8880491f4000 R15: ffffffff8b612d08
FS:  00007f74dd622700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000100 CR3: 000000007cdba000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ethnl_default_notify+0x1c2/0x610 net/ethtool/netlink.c:643
 ethtool_notify+0xc1/0x1f0 net/ethtool/netlink.c:716
 ethtool_set_pauseparam net/ethtool/ioctl.c:1882 [inline]
 __dev_ethtool net/ethtool/ioctl.c:2895 [inline]
 dev_ethtool+0xa59/0x5110 net/ethtool/ioctl.c:3078
 dev_ioctl+0x2cb/0x1060 net/core/dev_ioctl.c:524
 sock_do_ioctl+0x15a/0x230 net/socket.c:1208
 sock_ioctl+0x1f8/0x680 net/socket.c:1311
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f74dc88c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f74dd622168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f74dc9abf80 RCX: 00007f74dc88c0c9
RDX: 0000000020005e40 RSI: 0000000000008946 RDI: 0000000000000003
RBP: 00007f74dc8e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff0cec5f1f R14: 00007f74dd622300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pause_prepare_data+0x60/0x400 net/ethtool/pause.c:59
Code: 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 02 03 00 00 48 8d 7d 40 45 8b 6c 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 14 03 00 00 48 8b 45 40 48 89 da 48 c1 ea 03 48
RSP: 0018:ffffc900151a7880 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88801f245980 RCX: ffffc9000ccf2000
RDX: 0000000000000008 RSI: ffffffff88074170 RDI: 0000000000000040
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88801f245980
R10: ffffed1003e48b35 R11: 0000000000000000 R12: ffff8880295ab280
R13: 0000000000000000 R14: ffff8880491f4000 R15: ffffffff8b612d08
FS:  00007f74dd622700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa3fd86b58 CR3: 000000007cdba000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
   4:	84 c0                	test   %al,%al
   6:	74 08                	je     0x10
   8:	3c 03                	cmp    $0x3,%al
   a:	0f 8e 02 03 00 00    	jle    0x312
  10:	48 8d 7d 40          	lea    0x40(%rbp),%rdi
  14:	45 8b 6c 24 18       	mov    0x18(%r12),%r13d
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 14 03 00 00    	jne    0x348
  34:	48 8b 45 40          	mov    0x40(%rbp),%rax
  38:	48 89 da             	mov    %rbx,%rdx
  3b:	48 c1 ea 03          	shr    $0x3,%rdx
  3f:	48                   	rex.W