diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2011-06-20 19:38:15 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-07-20 01:43:26 -0400 |
| commit | e74f71eb78a4a8b9eaf1bc65f20f761648e85f76 (patch) | |
| tree | 7bc7fc1344f5ed6e3ce8132b36125ef5cec6407c /security | |
| parent | 10556cb21a0d0b24d95f00ea6df16f599a3345b2 (diff) | |
| download | lwn-e74f71eb78a4a8b9eaf1bc65f20f761648e85f76.tar.gz lwn-e74f71eb78a4a8b9eaf1bc65f20f761648e85f76.zip | |
->permission() sanitizing: don't pass flags to ->inode_permission()
pass that via mask instead.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'security')
| -rw-r--r-- | security/capability.c | 2 | ||||
| -rw-r--r-- | security/security.c | 7 | ||||
| -rw-r--r-- | security/selinux/hooks.c | 5 | ||||
| -rw-r--r-- | security/smack/smack_lsm.c | 5 |
4 files changed, 12 insertions, 7 deletions
diff --git a/security/capability.c b/security/capability.c index bbb51156261b..2984ea4f776f 100644 --- a/security/capability.c +++ b/security/capability.c @@ -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; } diff --git a/security/security.c b/security/security.c index 4ba6d4cc061f..db3b750da353 100644 --- a/security/security.c +++ b/security/security.c @@ -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) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 20219ef5439a..47a059fff344 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -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) diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 9831a39c11f6..f375eb2e1957 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -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); |