Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 0 UID: 0 PID: 11576 Comm: syz.0.1125 Tainted: G U syzkaller #0 PREEMPT(full) Tainted: [U]=USER Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:generic_hwtstamp_ioctl_lower+0x185/0x380 net/core/dev_ioctl.c:447 Code: 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 e1 01 00 00 48 be 00 00 00 00 00 fc ff df 49 8b 45 10 48 8d 78 10 48 89 fa 48 c1 ea 03 <0f> b6 0c 32 48 8d 50 27 49 89 d0 83 e2 07 49 c1 e8 03 41 0f b6 34 RSP: 0018:ffffc9000b306fe0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 1ffff92001660dfe RCX: ffffc9000d11e000 RDX: 0000000000000002 RSI: dffffc0000000000 RDI: 0000000000000010 RBP: ffffc9000b3070c0 R08: 0000000000000001 R09: 0000000000000003 R10: ffffc9000b30702b R11: 0000000000000001 R12: ffffc9000b3071b0 R13: ffffc9000b3071a0 R14: ffff888033f12000 R15: ffffc9000b307020 FS: 00007f2211b5d6c0(0000) GS:ffff8881249e1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f04583156c0 CR3: 000000007830e000 CR4: 00000000003526f0 Call Trace: generic_hwtstamp_get_lower net/core/dev_ioctl.c:478 [inline] generic_hwtstamp_get_lower+0x269/0x360 net/core/dev_ioctl.c:459 dev_get_hwtstamp_phylib+0x184/0x610 net/core/dev_ioctl.c:278 tsconfig_prepare_data+0x15e/0x620 net/ethtool/tsconfig.c:51 ethnl_default_dump_one+0x29b/0xa20 net/ethtool/netlink.c:591 ethnl_default_dumpit+0x28d/0x6c0 net/ethtool/netlink.c:628 genl_dumpit+0x125/0x230 net/netlink/genetlink.c:1027 netlink_dump+0x539/0xd30 net/netlink/af_netlink.c:2327 __netlink_dump_start+0x6d6/0x990 net/netlink/af_netlink.c:2442 genl_family_rcv_msg_dumpit+0x1e2/0x2e0 net/netlink/genetlink.c:1076 genl_family_rcv_msg net/netlink/genetlink.c:1192 [inline] genl_rcv_msg+0x46e/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xa98/0xc70 net/socket.c:2630 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2684 __sys_sendmsg+0x16d/0x220 net/socket.c:2716 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2210d8eec9 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:00007f2211b5d038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f2210fe6090 RCX: 00007f2210d8eec9 RDX: 000000002004c894 RSI: 0000200000000140 RDI: 0000000000000009 RBP: 00007f2210e11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2210fe6128 R14: 00007f2210fe6090 R15: 00007fff5f774598 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:generic_hwtstamp_ioctl_lower+0x185/0x380 net/core/dev_ioctl.c:447 Code: 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 e1 01 00 00 48 be 00 00 00 00 00 fc ff df 49 8b 45 10 48 8d 78 10 48 89 fa 48 c1 ea 03 <0f> b6 0c 32 48 8d 50 27 49 89 d0 83 e2 07 49 c1 e8 03 41 0f b6 34 RSP: 0018:ffffc9000b306fe0 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 1ffff92001660dfe RCX: ffffc9000d11e000 RDX: 0000000000000002 RSI: dffffc0000000000 RDI: 0000000000000010 RBP: ffffc9000b3070c0 R08: 0000000000000001 R09: 0000000000000003 R10: ffffc9000b30702b R11: 0000000000000001 R12: ffffc9000b3071b0 R13: ffffc9000b3071a0 R14: ffff888033f12000 R15: ffffc9000b307020 FS: 00007f2211b5d6c0(0000) GS:ffff8881249e1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f045835ff98 CR3: 000000007830e000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 4c 89 e2 mov %r12,%rdx 3: 48 c1 ea 03 shr $0x3,%rdx 7: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) b: 0f 85 e1 01 00 00 jne 0x1f2 11: 48 be 00 00 00 00 00 movabs $0xdffffc0000000000,%rsi 18: fc ff df 1b: 49 8b 45 10 mov 0x10(%r13),%rax 1f: 48 8d 78 10 lea 0x10(%rax),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 0c 32 movzbl (%rdx,%rsi,1),%ecx <-- trapping instruction 2e: 48 8d 50 27 lea 0x27(%rax),%rdx 32: 49 89 d0 mov %rdx,%r8 35: 83 e2 07 and $0x7,%edx 38: 49 c1 e8 03 shr $0x3,%r8 3c: 41 rex.B 3d: 0f .byte 0xf 3e: b6 34 mov $0x34,%dh