general protection fault, probably for non-canonical address 0xdffffc0000000173: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000b98-0x0000000000000b9f] CPU: 0 PID: 13403 Comm: syz-executor.4 Not tainted 6.2.0-rc3-next-20230112-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:ethnl_set_plca_cfg+0x1c5/0x810 net/ethtool/plca.c:162 Code: ec 79 f9 4c 8b 7c 24 58 e8 68 20 c6 ff 49 8d 87 98 0b 00 00 48 89 c2 48 89 44 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 7d 05 00 00 49 83 bf 98 0b 00 00 00 0f 84 b8 04 RSP: 0018:ffffc9000a1b7470 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffc9000a1b75d8 RCX: 0000000000000000 RDX: 0000000000000173 RSI: 0000000000000002 RDI: 0000000000000001 RBP: 1ffff92001436e95 R08: 0000000000000000 R09: ffffffff8e73c6d7 R10: fffffbfff1ce78da R11: 0000000000000000 R12: 00000000ffffffea R13: ffff8880773bbf00 R14: ffffc9000a1b7618 R15: 0000000000000000 FS: 00007f4954000700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f206970e262 CR3: 000000002b22d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: genl_family_rcv_msg_doit.isra.0+0x1e6/0x2d0 net/netlink/genetlink.c:968 genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline] genl_rcv_msg+0x4ff/0x7e0 net/netlink/genetlink.c:1065 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2564 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1356 netlink_sendmsg+0x925/0xe20 net/netlink/af_netlink.c:1932 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2476 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2530 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2559 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: 0033:0x7f495328c0c9 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:00007f4954000168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f49533abf80 RCX: 00007f495328c0c9 RDX: 0000000000000000 RSI: 0000000020001300 RDI: 0000000000000003 RBP: 00007f49532e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2d141a1f R14: 00007f4954000300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ethnl_set_plca_cfg+0x1c5/0x810 net/ethtool/plca.c:162 Code: ec 79 f9 4c 8b 7c 24 58 e8 68 20 c6 ff 49 8d 87 98 0b 00 00 48 89 c2 48 89 44 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 7d 05 00 00 49 83 bf 98 0b 00 00 00 0f 84 b8 04 RSP: 0018:ffffc9000a1b7470 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffc9000a1b75d8 RCX: 0000000000000000 RDX: 0000000000000173 RSI: 0000000000000002 RDI: 0000000000000001 RBP: 1ffff92001436e95 R08: 0000000000000000 R09: ffffffff8e73c6d7 R10: fffffbfff1ce78da R11: 0000000000000000 R12: 00000000ffffffea R13: ffff8880773bbf00 R14: ffffc9000a1b7618 R15: 0000000000000000 FS: 00007f4954000700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3342c000 CR3: 000000002b22d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ec in (%dx),%al 1: 79 f9 jns 0xfffffffc 3: 4c 8b 7c 24 58 mov 0x58(%rsp),%r15 8: e8 68 20 c6 ff callq 0xffc62075 d: 49 8d 87 98 0b 00 00 lea 0xb98(%r15),%rax 14: 48 89 c2 mov %rax,%rdx 17: 48 89 44 24 08 mov %rax,0x8(%rsp) 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 7d 05 00 00 jne 0x5b1 34: 49 83 bf 98 0b 00 00 cmpq $0x0,0xb98(%r15) 3b: 00 3c: 0f .byte 0xf 3d: 84 .byte 0x84 3e: b8 .byte 0xb8 3f: 04 .byte 0x4