diff options
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/sysctl_net_core.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c index 637a42e5d589..78c746e016ae 100644 --- a/net/core/sysctl_net_core.c +++ b/net/core/sysctl_net_core.c @@ -132,6 +132,8 @@ static int flow_limit_cpu_sysctl(struct ctl_table *table, int write, write_unlock: mutex_unlock(&flow_limit_update_mutex); } else { + char kbuf[128]; + if (*ppos || !*lenp) { *lenp = 0; goto done; @@ -146,9 +148,20 @@ write_unlock: } rcu_read_unlock(); - len = cpumask_scnprintf(buffer, *lenp, mask); - *lenp = len + 1; - *ppos += len + 1; + len = min(sizeof(kbuf) - 1, *lenp); + len = cpumask_scnprintf(kbuf, len, mask); + if (!len) { + *lenp = 0; + goto done; + } + if (len < *lenp) + kbuf[len++] = '\n'; + if (copy_to_user(buffer, kbuf, len)) { + ret = -EFAULT; + goto done; + } + *lenp = len; + *ppos += len; } done: |