Oops: general protection fault, probably for non-canonical address 0xdffffc000000004c: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000260-0x0000000000000267] CPU: 0 UID: 0 PID: 6567 Comm: syz.1.169 Not tainted 6.12.0-rc7-syzkaller-01557-gdfc14664794a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:dev_prep_valid_name+0x3e3/0xa40 net/core/dev.c:1165 Code: 20 08 00 00 e8 be 45 27 fb 48 85 c0 0f 84 8f 04 00 00 48 89 44 24 38 48 8b 5c 24 30 48 81 c3 68 02 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 4e 8b 6b f8 48 8b 03 48 89 5c 24 RSP: 0018:ffffc9001810e940 EFLAGS: 00010203 RAX: 000000000000004c RBX: 0000000000000265 RCX: 0000000000002000 RDX: 0000000000001000 RSI: ffffffff8c610dc0 RDI: ffffffff8c610d80 RBP: ffffc9001810ea50 R08: 0000000000000920 R09: 00000000ffffffff R10: dffffc0000000000 R11: fffffbfff203ad36 R12: dffffc0000000000 R13: 1ffff92003021d38 R14: ffff888034b00126 R15: 1ffff92003021d34 FS: 00007f612ad096c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffff CR3: 000000007c9d4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dev_get_valid_name net/core/dev.c:1199 [inline] register_netdevice+0x542/0x1b00 net/core/dev.c:10509 veth_newlink+0x455/0xc10 drivers/net/veth.c:1819 rtnl_newlink_create+0x2df/0xa30 net/core/rtnetlink.c:3774 __rtnl_newlink net/core/rtnetlink.c:3891 [inline] rtnl_newlink+0x17dd/0x24f0 net/core/rtnetlink.c:4001 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6903 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2536 netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1342 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1886 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2609 ___sys_sendmsg net/socket.c:2663 [inline] __sys_sendmsg+0x292/0x380 net/socket.c:2692 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: 0033:0x7f6129f7e719 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:00007f612ad09038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f612a136130 RCX: 00007f6129f7e719 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000009 RBP: 00007f6129ff175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f612a136130 R15: 00007fff17670218 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dev_prep_valid_name+0x3e3/0xa40 net/core/dev.c:1165 Code: 20 08 00 00 e8 be 45 27 fb 48 85 c0 0f 84 8f 04 00 00 48 89 44 24 38 48 8b 5c 24 30 48 81 c3 68 02 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 4e 8b 6b f8 48 8b 03 48 89 5c 24 RSP: 0018:ffffc9001810e940 EFLAGS: 00010203 RAX: 000000000000004c RBX: 0000000000000265 RCX: 0000000000002000 RDX: 0000000000001000 RSI: ffffffff8c610dc0 RDI: ffffffff8c610d80 RBP: ffffc9001810ea50 R08: 0000000000000920 R09: 00000000ffffffff R10: dffffc0000000000 R11: fffffbfff203ad36 R12: dffffc0000000000 R13: 1ffff92003021d38 R14: ffff888034b00126 R15: 1ffff92003021d34 FS: 00007f612ad096c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffff CR3: 000000007c9d4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 20 08 and %cl,(%rax) 2: 00 00 add %al,(%rax) 4: e8 be 45 27 fb call 0xfb2745c7 9: 48 85 c0 test %rax,%rax c: 0f 84 8f 04 00 00 je 0x4a1 12: 48 89 44 24 38 mov %rax,0x38(%rsp) 17: 48 8b 5c 24 30 mov 0x30(%rsp),%rbx 1c: 48 81 c3 68 02 00 00 add $0x268,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 4e 8b 6b f8 call 0xf86b8b87 39: 48 8b 03 mov (%rbx),%rax 3c: 48 rex.W 3d: 89 .byte 0x89 3e: 5c pop %rsp 3f: 24 .byte 0x24