diff options
Diffstat (limited to 'fs/proc/proc_sysctl.c')
| -rw-r--r-- | fs/proc/proc_sysctl.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c index f9a8b892718..94fcfff6863 100644 --- a/fs/proc/proc_sysctl.c +++ b/fs/proc/proc_sysctl.c @@ -1,7 +1,7 @@ /* * /proc/sys support */ - +#include <linux/init.h> #include <linux/sysctl.h> #include <linux/proc_fs.h> #include <linux/security.h> @@ -66,7 +66,7 @@ static struct ctl_table *find_in_table(struct ctl_table *p, struct qstr *name) return NULL; } -struct ctl_table_header *grab_header(struct inode *inode) +static struct ctl_table_header *grab_header(struct inode *inode) { if (PROC_I(inode)->sysctl) return sysctl_head_grab(PROC_I(inode)->sysctl); @@ -298,13 +298,19 @@ static int proc_sys_permission(struct inode *inode, int mask) * sysctl entries that are not writeable, * are _NOT_ writeable, capabilities or not. */ - struct ctl_table_header *head = grab_header(inode); - struct ctl_table *table = PROC_I(inode)->sysctl_entry; + struct ctl_table_header *head; + struct ctl_table *table; int error; + /* Executable files are not allowed under /proc/sys/ */ + if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) + return -EACCES; + + head = grab_header(inode); if (IS_ERR(head)) return PTR_ERR(head); + table = PROC_I(inode)->sysctl_entry; if (!table) /* global root - r-xr-xr-x */ error = mask & MAY_WRITE ? -EACCES : 0; else /* Use the permissions on the sysctl table entry */ @@ -353,6 +359,7 @@ static const struct file_operations proc_sys_file_operations = { static const struct file_operations proc_sys_dir_file_operations = { .readdir = proc_sys_readdir, + .llseek = generic_file_llseek, }; static const struct inode_operations proc_sys_inode_operations = { @@ -395,10 +402,10 @@ static struct dentry_operations proc_sys_dentry_operations = { .d_compare = proc_sys_compare, }; -static struct proc_dir_entry *proc_sys_root; - -int proc_sys_init(void) +int __init proc_sys_init(void) { + struct proc_dir_entry *proc_sys_root; + proc_sys_root = proc_mkdir("sys", NULL); proc_sys_root->proc_iops = &proc_sys_dir_operations; proc_sys_root->proc_fops = &proc_sys_dir_file_operations; |