general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] CPU: 0 PID: 29530 Comm: syz-executor.1 Not tainted 6.2.0-rc4-syzkaller-00845-gd0671115869d #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:ffffc90015a2f270 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888076e62e80 RCX: ffffc9000d403000 RDX: 0000000000000008 RSI: ffffffff880742a0 RDI: 0000000000000040 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8e732817 R10: fffffbfff1ce6502 R11: 0000000000000000 R12: ffff8880762ec180 R13: 0000000000000000 R14: ffff888068f3d598 R15: ffffffff88074280 FS: 00007f2c9dffc700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb30730e263 CR3: 0000000020886000 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:446 [inline] ethnl_default_dumpit+0x4a8/0xe80 net/ethtool/netlink.c:498 netlink_dump+0x570/0xc50 net/netlink/af_netlink.c:2286 __netlink_dump_start+0x64b/0x910 net/netlink/af_netlink.c:2391 genl_family_rcv_msg_dumpit+0x2be/0x310 net/netlink/genetlink.c:929 genl_family_rcv_msg net/netlink/genetlink.c:1045 [inline] genl_rcv_msg+0x419/0x7e0 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+0x91b/0xe10 net/netlink/af_netlink.c:1932 sock_sendmsg_nosec net/socket.c:722 [inline] sock_sendmsg+0xde/0x190 net/socket.c:745 ____sys_sendmsg+0x71c/0x900 net/socket.c:2501 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2555 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2584 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: 0033:0x7f2c9d28c0c9 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:00007f2c9dffc168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f2c9d3abf80 RCX: 00007f2c9d28c0c9 RDX: 0000000000000000 RSI: 0000000020000540 RDI: 0000000000000003 RBP: 00007f2c9d2e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3d21cacf R14: 00007f2c9dffc300 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:ffffc90015a2f270 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888076e62e80 RCX: ffffc9000d403000 RDX: 0000000000000008 RSI: ffffffff880742a0 RDI: 0000000000000040 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8e732817 R10: fffffbfff1ce6502 R11: 0000000000000000 R12: ffff8880762ec180 R13: 0000000000000000 R14: ffff888068f3d598 R15: ffffffff88074280 FS: 00007f2c9dffc700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3283c000 CR3: 0000000020886000 CR4: 00000000003506f0 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