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->permission() sanitizing: don't pass flags to ->inode_permission() 

pass that via mask instead.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-06-20 19:38:15 -04:00
parent 10556cb21a
commit e74f71eb78
5 changed files with 13 additions and 8 deletions
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2
include/linux/security.h
View File

@ -1456,7 +1456,7 @@ struct security_operations {
struct inode *new_dir, struct dentry *new_dentry);
int (*inode_readlink) (struct dentry *dentry);
int (*inode_follow_link) (struct dentry *dentry, struct nameidata *nd);
int (*inode_permission) (struct inode *inode, int mask, unsigned flags);
int (*inode_permission) (struct inode *inode, int mask);
int (*inode_setattr) (struct dentry *dentry, struct iattr *attr);
int (*inode_getattr) (struct vfsmount *mnt, struct dentry *dentry);
int (*inode_setxattr) (struct dentry *dentry, const char *name,

2
security/capability.c
View File

@ -181,7 +181,7 @@ static int cap_inode_follow_link(struct dentry *dentry,
return 0;
}
static int cap_inode_permission(struct inode *inode, int mask, unsigned flags)
static int cap_inode_permission(struct inode *inode, int mask)
{
return 0;
}

7
security/security.c
View File

@ -518,14 +518,17 @@ int security_inode_permission(struct inode *inode, int mask)
{
if (unlikely(IS_PRIVATE(inode)))
return 0;
return security_ops->inode_permission(inode, mask, 0);
return security_ops->inode_permission(inode, mask);
}
int security_inode_exec_permission(struct inode *inode, unsigned int flags)
{
int mask = MAY_EXEC;
if (unlikely(IS_PRIVATE(inode)))
return 0;
return security_ops->inode_permission(inode, MAY_EXEC, flags);
if (flags)
mask |= MAY_NOT_BLOCK;
return security_ops->inode_permission(inode, mask);
}
int security_inode_setattr(struct dentry *dentry, struct iattr *attr)

5
security/selinux/hooks.c
View File

@ -2659,12 +2659,13 @@ static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *na
return dentry_has_perm(cred, dentry, FILE__READ);
}
static int selinux_inode_permission(struct inode *inode, int mask, unsigned flags)
static int selinux_inode_permission(struct inode *inode, int mask)
{
const struct cred *cred = current_cred();
struct common_audit_data ad;
u32 perms;
bool from_access;
unsigned __flags = mask & MAY_NOT_BLOCK ? IPERM_FLAG_RCU : 0;
from_access = mask & MAY_ACCESS;
mask &= (MAY_READ|MAY_WRITE|MAY_EXEC|MAY_APPEND);
@ -2681,7 +2682,7 @@ static int selinux_inode_permission(struct inode *inode, int mask, unsigned flag
perms = file_mask_to_av(inode->i_mode, mask);
return inode_has_perm(cred, inode, perms, &ad, flags);
return inode_has_perm(cred, inode, perms, &ad, __flags);
}
static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)

5
security/smack/smack_lsm.c
View File

@ -689,9 +689,10 @@ static int smack_inode_rename(struct inode *old_inode,
*
* Returns 0 if access is permitted, -EACCES otherwise
*/
static int smack_inode_permission(struct inode *inode, int mask, unsigned flags)
static int smack_inode_permission(struct inode *inode, int mask)
{
struct smk_audit_info ad;
int no_block = mask & MAY_NOT_BLOCK;
mask &= (MAY_READ|MAY_WRITE|MAY_EXEC|MAY_APPEND);
/*
@ -701,7 +702,7 @@ static int smack_inode_permission(struct inode *inode, int mask, unsigned flags)
return 0;
/* May be droppable after audit */
if (flags & IPERM_FLAG_RCU)
if (no_block)
return -ECHILD;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_INODE);
smk_ad_setfield_u_fs_inode(&ad, inode);