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Apparmor: mediated_filesystem() should use dentry->d_sb not inode->i_sb

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mediated_filesystem() should use dentry->d_sb not dentry->d_inode->i_sb and
should avoid file_inode() also since it is really dealing with the path.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells 2015-01-29 12:02:31 +00:00 committed by Al Viro
parent 44bdb5e5f6
commit 7ac2856d99
2 changed files with 12 additions and 12 deletions
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4
security/apparmor/include/apparmor.h
View File

@ -112,9 +112,9 @@ static inline unsigned int aa_dfa_null_transition(struct aa_dfa *dfa,
return aa_dfa_next(dfa, start, 0);
}
static inline bool mediated_filesystem(struct inode *inode)
static inline bool mediated_filesystem(struct dentry *dentry)
{
return !(inode->i_sb->s_flags & MS_NOUSER);
return !(dentry->d_sb->s_flags & MS_NOUSER);
}
#endif /* __APPARMOR_H */

20
security/apparmor/lsm.c
View File

@ -226,7 +226,7 @@ static int common_perm_rm(int op, struct path *dir,
struct inode *inode = dentry->d_inode;
struct path_cond cond = { };
if (!inode || !dir->mnt || !mediated_filesystem(inode))
if (!inode || !dir->mnt || !mediated_filesystem(dentry))
return 0;
cond.uid = inode->i_uid;
@ -250,7 +250,7 @@ static int common_perm_create(int op, struct path *dir, struct dentry *dentry,
{
struct path_cond cond = { current_fsuid(), mode };
if (!dir->mnt || !mediated_filesystem(dir->dentry->d_inode))
if (!dir->mnt || !mediated_filesystem(dir->dentry))
return 0;
return common_perm_dir_dentry(op, dir, dentry, mask, &cond);
@ -285,7 +285,7 @@ static int apparmor_path_truncate(struct path *path)
path->dentry->d_inode->i_mode
};
if (!path->mnt || !mediated_filesystem(path->dentry->d_inode))
if (!path->mnt || !mediated_filesystem(path->dentry))
return 0;
return common_perm(OP_TRUNC, path, MAY_WRITE | AA_MAY_META_WRITE,
@ -305,7 +305,7 @@ static int apparmor_path_link(struct dentry *old_dentry, struct path *new_dir,
struct aa_profile *profile;
int error = 0;
if (!mediated_filesystem(old_dentry->d_inode))
if (!mediated_filesystem(old_dentry))
return 0;
profile = aa_current_profile();
@ -320,7 +320,7 @@ static int apparmor_path_rename(struct path *old_dir, struct dentry *old_dentry,
struct aa_profile *profile;
int error = 0;
if (!mediated_filesystem(old_dentry->d_inode))
if (!mediated_filesystem(old_dentry))
return 0;
profile = aa_current_profile();
@ -346,7 +346,7 @@ static int apparmor_path_rename(struct path *old_dir, struct dentry *old_dentry,
static int apparmor_path_chmod(struct path *path, umode_t mode)
{
if (!mediated_filesystem(path->dentry->d_inode))
if (!mediated_filesystem(path->dentry))
return 0;
return common_perm_mnt_dentry(OP_CHMOD, path->mnt, path->dentry, AA_MAY_CHMOD);
@ -358,7 +358,7 @@ static int apparmor_path_chown(struct path *path, kuid_t uid, kgid_t gid)
path->dentry->d_inode->i_mode
};
if (!mediated_filesystem(path->dentry->d_inode))
if (!mediated_filesystem(path->dentry))
return 0;
return common_perm(OP_CHOWN, path, AA_MAY_CHOWN, &cond);
@ -366,7 +366,7 @@ static int apparmor_path_chown(struct path *path, kuid_t uid, kgid_t gid)
static int apparmor_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
{
if (!mediated_filesystem(dentry->d_inode))
if (!mediated_filesystem(dentry))
return 0;
return common_perm_mnt_dentry(OP_GETATTR, mnt, dentry,
@ -379,7 +379,7 @@ static int apparmor_file_open(struct file *file, const struct cred *cred)
struct aa_profile *profile;
int error = 0;
if (!mediated_filesystem(file_inode(file)))
if (!mediated_filesystem(file->f_path.dentry))
return 0;
/* If in exec, permission is handled by bprm hooks.
@ -432,7 +432,7 @@ static int common_file_perm(int op, struct file *file, u32 mask)
BUG_ON(!fprofile);
if (!file->f_path.mnt ||
!mediated_filesystem(file_inode(file)))
!mediated_filesystem(file->f_path.dentry))
return 0;
profile = __aa_current_profile();