diff options
Diffstat (limited to 'kernel/sysctl.c')
| -rw-r--r-- | kernel/sysctl.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 8bff2c18fb5ae1..09e569f4792be6 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1315,7 +1315,9 @@ repeat: return -ENOTDIR; if (get_user(n, name)) return -EFAULT; - for ( ; table->ctl_name; table++) { + for ( ; table->ctl_name || table->procname; table++) { + if (!table->ctl_name) + continue; if (n == table->ctl_name || table->ctl_name == CTL_ANY) { int error; if (table->child) { @@ -1532,7 +1534,7 @@ static void register_proc_table(ctl_table * table, struct proc_dir_entry *root, int len; mode_t mode; - for (; table->ctl_name; table++) { + for (; table->ctl_name || table->procname; table++) { /* Can't do anything without a proc name. */ if (!table->procname) continue; @@ -1579,7 +1581,7 @@ static void register_proc_table(ctl_table * table, struct proc_dir_entry *root, static void unregister_proc_table(ctl_table * table, struct proc_dir_entry *root) { struct proc_dir_entry *de; - for (; table->ctl_name; table++) { + for (; table->ctl_name || table->procname; table++) { if (!(de = table->de)) continue; if (de->mode & S_IFDIR) { @@ -2680,13 +2682,33 @@ int sysctl_ms_jiffies(ctl_table *table, int __user *name, int nlen, asmlinkage long sys_sysctl(struct __sysctl_args __user *args) { static int msg_count; + struct __sysctl_args tmp; + int name[CTL_MAXNAME]; + int i; + + /* Read in the sysctl name for better debug message logging */ + if (copy_from_user(&tmp, args, sizeof(tmp))) + return -EFAULT; + if (tmp.nlen <= 0 || tmp.nlen >= CTL_MAXNAME) + return -ENOTDIR; + for (i = 0; i < tmp.nlen; i++) + if (get_user(name[i], tmp.name + i)) + return -EFAULT; + + /* Ignore accesses to kernel.version */ + if ((tmp.nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION)) + goto out; if (msg_count < 5) { msg_count++; printk(KERN_INFO "warning: process `%s' used the removed sysctl " - "system call\n", current->comm); + "system call with ", current->comm); + for (i = 0; i < tmp.nlen; i++) + printk("%d.", name[i]); + printk("\n"); } +out: return -ENOSYS; } |