IPVS: set_ctl: invalid protocol: 108 0.0.0.0:20000 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 24557 Comm: syz.4.5275 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:strcmp+0x24/0xc0 lib/string.c:283 Code: 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 54 53 48 bb 00 00 00 00 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 <0f> b6 0c 19 84 c9 75 2c 42 0f b6 2c 37 4a 8d 04 36 48 89 c1 48 c1 RSP: 0018:ffffc90003fffbf0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffc90003fffd00 RDI: 0000000000000000 RBP: 000000008bd7f493 R08: 0000000000000000 R09: ffffffff89725581 R10: 00000000000089b1 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffc90003fffd50 R14: 0000000000000000 R15: ffff888028747228 FS: 00007f2612f426c0(0000) GS:ffff888125d1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2e1f3d CR3: 000000003bc72000 CR4: 00000000003526f0 Call Trace: netdev_name_node_lookup_rcu net/core/dev.c:327 [inline] dev_get_by_name_rcu+0xcc/0x140 net/core/dev.c:885 dev_load+0xc7/0x1f0 net/core/dev_ioctl.c:677 dev_ioctl+0x680/0x1150 net/core/dev_ioctl.c:749 sock_do_ioctl+0x22c/0x300 net/socket.c:1252 sock_ioctl+0x576/0x790 net/socket.c:1359 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f261218ebe9 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:00007f2612f42038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f26123b5fa0 RCX: 00007f261218ebe9 RDX: 0000200000000840 RSI: 0000000000008933 RDI: 0000000000000005 RBP: 00007f2612211e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f26123b6038 R14: 00007f26123b5fa0 R15: 00007fff1a90fb28 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:strcmp+0x24/0xc0 lib/string.c:283 Code: 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 54 53 48 bb 00 00 00 00 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 <0f> b6 0c 19 84 c9 75 2c 42 0f b6 2c 37 4a 8d 04 36 48 89 c1 48 c1 RSP: 0018:ffffc90003fffbf0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffc90003fffd00 RDI: 0000000000000000 RBP: 000000008bd7f493 R08: 0000000000000000 R09: ffffffff89725581 R10: 00000000000089b1 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffc90003fffd50 R14: 0000000000000000 R15: ffff888028747228 FS: 00007f2612f426c0(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7c86d0fe9c CR3: 000000003bc72000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: f3 0f 1e fa endbr64 a: 55 push %rbp b: 41 57 push %r15 d: 41 56 push %r14 f: 41 54 push %r12 11: 53 push %rbx 12: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx 19: fc ff df 1c: 45 31 f6 xor %r14d,%r14d 1f: 4a 8d 04 37 lea (%rdi,%r14,1),%rax 23: 48 89 c1 mov %rax,%rcx 26: 48 c1 e9 03 shr $0x3,%rcx * 2a: 0f b6 0c 19 movzbl (%rcx,%rbx,1),%ecx <-- trapping instruction 2e: 84 c9 test %cl,%cl 30: 75 2c jne 0x5e 32: 42 0f b6 2c 37 movzbl (%rdi,%r14,1),%ebp 37: 4a 8d 04 36 lea (%rsi,%r14,1),%rax 3b: 48 89 c1 mov %rax,%rcx 3e: 48 rex.W 3f: c1 .byte 0xc1