Here are five possible patches for the CWE-190 (Integer Overflow or Wraparound) vulnerability in the given code:

Patch 1: Add bounds checking before incrementing the statistic
```c
void icmp_out_count(struct net *net, unsigned char type)
{
    if (type < 256) {  // Ensure type is within valid range
        ICMPMSGOUT_INC_STATS(net, type);
        ICMP_INC_STATS(net, ICMP_MIB_OUTMSGS);
    }
}
```

Patch 2: Use a safer macro that includes bounds checking
```c
#define SAFE_ICMPMSGOUT_INC_STATS(net, field) \
    do { \
        if ((field) < 256) \
            SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, (field)+256); \
    } while (0)

void icmp_out_count(struct net *net, unsigned char type)
{
    SAFE_ICMPMSGOUT_INC_STATS(net, type);
    ICMP_INC_STATS(net, ICMP_MIB_OUTMSGS);
}
```

Patch 3: Use a function with bounds checking instead of a macro
```c
static inline void safe_icmpmsgout_inc_stats(struct net *net, unsigned char type)
{
    if (type < 256)
        SNMP_INC_STATS_ATOMIC_LONG(net->mib.icmpmsg_statistics, type+256);
}

void icmp_out_count(struct net *net, unsigned char type)
{
    safe_icmpmsgout_inc_stats(net, type);
    ICMP_INC_STATS(net, ICMP_MIB_OUTMSGS);
}
```

Patch 4: Use a wider type for the 'type' parameter
```c
void icmp_out_count(struct net *net, uint16_t type)
{
    if (type < 256) {
        ICMPMSGOUT_INC_STATS(net, (unsigned char)type);
        ICMP_INC_STATS(net, ICMP_MIB_OUTMSGS);
    }
}
```

Patch 5: Use modulo arithmetic to ensure the type is always within range
```c
void icmp_out_count(struct net *net, unsigned char type)
{
    unsigned char safe_type = type % 256;
    ICMPMSGOUT_INC_STATS(net, safe_type);
    ICMP_INC_STATS(net, ICMP_MIB_OUTMSGS);
}
```

Each of these patches addresses the potential integer overflow by ensuring that the 'type' value used in ICMPMSGOUT_INC_STATS is always within the valid range (0-255). The choice of which patch to use would depend on the specific requirements and constraints of the project.