From e74f71eb78a4a8b9eaf1bc65f20f761648e85f76 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 20 Jun 2011 19:38:15 -0400 Subject: ->permission() sanitizing: don't pass flags to ->inode_permission() pass that via mask instead. Signed-off-by: Al Viro --- security/capability.c | 2 +- security/security.c | 7 +++++-- security/selinux/hooks.c | 5 +++-- security/smack/smack_lsm.c | 5 +++-- 4 files changed, 12 insertions(+), 7 deletions(-) (limited to 'security') 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); -- cgit v1.2.3 From cf1dd1dae851ce5765cda5de16aa965eef7c2dbf Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 20 Jun 2011 19:44:08 -0400 Subject: selinux: don't transliterate MAY_NOT_BLOCK to IPERM_FLAG_RCU Signed-off-by: Al Viro --- security/selinux/avc.c | 2 +- security/selinux/hooks.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) (limited to 'security') diff --git a/security/selinux/avc.c b/security/selinux/avc.c index d515b2128a4e..dca1c22d9276 100644 --- a/security/selinux/avc.c +++ b/security/selinux/avc.c @@ -527,7 +527,7 @@ int avc_audit(u32 ssid, u32 tsid, * happened a little later. */ if ((a->type == LSM_AUDIT_DATA_INODE) && - (flags & IPERM_FLAG_RCU)) + (flags & MAY_NOT_BLOCK)) return -ECHILD; a->selinux_audit_data.tclass = tclass; diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 47a059fff344..eb5d5cdf3c51 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2665,7 +2665,7 @@ static int selinux_inode_permission(struct inode *inode, int mask) struct common_audit_data ad; u32 perms; bool from_access; - unsigned __flags = mask & MAY_NOT_BLOCK ? IPERM_FLAG_RCU : 0; + unsigned flags = mask & MAY_NOT_BLOCK; from_access = mask & MAY_ACCESS; mask &= (MAY_READ|MAY_WRITE|MAY_EXEC|MAY_APPEND); @@ -2682,7 +2682,7 @@ static int selinux_inode_permission(struct inode *inode, int mask) 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) -- cgit v1.2.3 From eecdd358b467405a084d400d5ec571bbdbfe97a3 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 20 Jun 2011 19:48:41 -0400 Subject: ->permission() sanitizing: don't pass flags to exec_permission() pass mask instead; kill security_inode_exec_permission() since we can use security_inode_permission() instead. Signed-off-by: Al Viro --- security/security.c | 10 ---------- 1 file changed, 10 deletions(-) (limited to 'security') diff --git a/security/security.c b/security/security.c index db3b750da353..0e4fccfef12c 100644 --- a/security/security.c +++ b/security/security.c @@ -521,16 +521,6 @@ int security_inode_permission(struct inode *inode, int mask) 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; - if (flags) - mask |= MAY_NOT_BLOCK; - return security_ops->inode_permission(inode, mask); -} - int security_inode_setattr(struct dentry *dentry, struct iattr *attr) { if (unlikely(IS_PRIVATE(dentry->d_inode))) -- cgit v1.2.3 From fb408e6ccc32404a05783911b6f3fed56bd17b06 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 7 Jul 2011 15:12:51 -0400 Subject: get rid of pointless checks for dentry->sb == NULL it never is... Signed-off-by: Al Viro --- security/tomoyo/realpath.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'security') diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c index d1e05b047715..8d95e91c9fc4 100644 --- a/security/tomoyo/realpath.c +++ b/security/tomoyo/realpath.c @@ -103,7 +103,7 @@ char *tomoyo_realpath_from_path(struct path *path) if (!buf) break; /* Get better name for socket. */ - if (dentry->d_sb && dentry->d_sb->s_magic == SOCKFS_MAGIC) { + if (dentry->d_sb->s_magic == SOCKFS_MAGIC) { struct inode *inode = dentry->d_inode; struct socket *sock = inode ? SOCKET_I(inode) : NULL; struct sock *sk = sock ? sock->sk : NULL; -- cgit v1.2.3