diff options
Diffstat (limited to 'security/selinux/selinuxfs.c')
| -rw-r--r-- | security/selinux/selinuxfs.c | 74 |
1 files changed, 70 insertions, 4 deletions
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c index a4efc966f065..00534c302ba2 100644 --- a/security/selinux/selinuxfs.c +++ b/security/selinux/selinuxfs.c @@ -9,7 +9,6 @@ * the Free Software Foundation, version 2. */ -#include <linux/config.h> #include <linux/kernel.h> #include <linux/pagemap.h> #include <linux/slab.h> @@ -38,6 +37,14 @@ unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; +#ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT +#define SELINUX_COMPAT_NET_VALUE 0 +#else +#define SELINUX_COMPAT_NET_VALUE 1 +#endif + +int selinux_compat_net = SELINUX_COMPAT_NET_VALUE; + static int __init checkreqprot_setup(char *str) { selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0; @@ -45,6 +52,13 @@ static int __init checkreqprot_setup(char *str) } __setup("checkreqprot=", checkreqprot_setup); +static int __init selinux_compat_net_setup(char *str) +{ + selinux_compat_net = simple_strtoul(str,NULL,0) ? 1 : 0; + return 1; +} +__setup("selinux_compat_net=", selinux_compat_net_setup); + static DEFINE_MUTEX(sel_mutex); @@ -85,6 +99,7 @@ enum sel_inos { SEL_AVC, /* AVC management directory */ SEL_MEMBER, /* compute polyinstantiation membership decision */ SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ + SEL_COMPAT_NET, /* whether to use old compat network packet controls */ }; #define TMPBUFLEN 12 @@ -364,6 +379,55 @@ static struct file_operations sel_checkreqprot_ops = { .write = sel_write_checkreqprot, }; +static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, + size_t count, loff_t *ppos) +{ + char tmpbuf[TMPBUFLEN]; + ssize_t length; + + length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); + return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); +} + +static ssize_t sel_write_compat_net(struct file * file, const char __user * buf, + size_t count, loff_t *ppos) +{ + char *page; + ssize_t length; + int new_value; + + length = task_has_security(current, SECURITY__LOAD_POLICY); + if (length) + return length; + + if (count >= PAGE_SIZE) + return -ENOMEM; + if (*ppos != 0) { + /* No partial writes. */ + return -EINVAL; + } + page = (char*)get_zeroed_page(GFP_KERNEL); + if (!page) + return -ENOMEM; + length = -EFAULT; + if (copy_from_user(page, buf, count)) + goto out; + + length = -EINVAL; + if (sscanf(page, "%d", &new_value) != 1) + goto out; + + selinux_compat_net = new_value ? 1 : 0; + length = count; +out: + free_page((unsigned long) page); + return length; +} +static struct file_operations sel_compat_net_ops = { + .read = sel_read_compat_net, + .write = sel_write_compat_net, +}; + /* * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c */ @@ -1219,6 +1283,7 @@ static int sel_fill_super(struct super_block * sb, void * data, int silent) [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, + [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, /* last one */ {""} }; ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); @@ -1279,10 +1344,11 @@ err: goto out; } -static struct super_block *sel_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data) +static int sel_get_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data, + struct vfsmount *mnt) { - return get_sb_single(fs_type, flags, data, sel_fill_super); + return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); } static struct file_system_type sel_fs_type = { |