Oops: general protection fault, probably for non-canonical address 0xdffffc0000000194: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000ca0-0x0000000000000ca7]
CPU: 0 PID: 6764 Comm: syz.3.509 Not tainted 6.10.0-rc5-syzkaller-01115-g30972a4ea092 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:coalesce_fill_reply+0xcc/0x1b70 net/ethtool/coalesce.c:214
Code: e8 59 cf f8 f7 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 63 9d 5e f8 bb a0 0c 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 45 9d 5e f8 48 8b 03 48 89 44 24
RSP: 0018:ffffc9000328eee0 EFLAGS: 00010202
RAX: 0000000000000194 RBX: 0000000000000ca0 RCX: 0000000000040000
RDX: ffffc90009519000 RSI: 000000000000116b RDI: 000000000000116c
RBP: ffffc9000328f118 R08: ffffffff899c0ee7 R09: 006e75745f7a7973
R10: dffffc0000000000 R11: ffffffff899d5700 R12: ffffffff899d5700
R13: dffffc0000000000 R14: ffff88802e003340 R15: ffff888023d3ec80
FS:  00007f62c368b6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555575be1808 CR3: 000000001f820000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ethnl_default_dump_one net/ethtool/netlink.c:502 [inline]
 ethnl_default_dumpit+0x5ac/0xb30 net/ethtool/netlink.c:529
 genl_dumpit+0x107/0x1a0 net/netlink/genetlink.c:1027
 netlink_dump+0x647/0xd80 net/netlink/af_netlink.c:2325
 __netlink_dump_start+0x59f/0x780 net/netlink/af_netlink.c:2440
 genl_family_rcv_msg_dumpit net/netlink/genetlink.c:1076 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1192 [inline]
 genl_rcv_msg+0x88c/0xec0 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2585
 ___sys_sendmsg net/socket.c:2639 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2668
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f62c2975b99
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f62c368b048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f62c2b03fa0 RCX: 00007f62c2975b99
RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000003
RBP: 00007f62c29f677e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f62c2b03fa0 R15: 00007ffc96242008
 </TASK>
Modules linke
----------------
Code disassembly (best guess):
   0:	e8 59 cf f8 f7       	call   0xf7f8cf5e
   5:	4c 89 f0             	mov    %r14,%rax
   8:	48 c1 e8 03          	shr    $0x3,%rax
   c:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  11:	74 08                	je     0x1b
  13:	4c 89 f7             	mov    %r14,%rdi
  16:	e8 63 9d 5e f8       	call   0xf85e9d7e
  1b:	bb a0 0c 00 00       	mov    $0xca0,%ebx
  20:	49 03 1e             	add    (%r14),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 45 9d 5e f8       	call   0xf85e9d7e
  39:	48 8b 03             	mov    (%rbx),%rax
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	44                   	rex.R
  3f:	24                   	.byte 0x24