diff options
Diffstat (limited to 'fs/overlayfs/dir.c')
| -rw-r--r-- | fs/overlayfs/dir.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c index 1560fdc..306b6c1 100644 --- a/fs/overlayfs/dir.c +++ b/fs/overlayfs/dir.c @@ -14,6 +14,7 @@ #include <linux/cred.h> #include <linux/posix_acl.h> #include <linux/posix_acl_xattr.h> +#include <linux/atomic.h> #include "overlayfs.h" void ovl_cleanup(struct inode *wdir, struct dentry *wdentry) @@ -37,8 +38,10 @@ struct dentry *ovl_lookup_temp(struct dentry *workdir, struct dentry *dentry) { struct dentry *temp; char name[20]; + static atomic_t temp_id = ATOMIC_INIT(0); - snprintf(name, sizeof(name), "#%lx", (unsigned long) dentry); + /* counter is allowed to wrap, since temp dentries are ephemeral */ + snprintf(name, sizeof(name), "#%x", atomic_inc_return(&temp_id)); temp = lookup_one_len(name, workdir, strlen(name)); if (!IS_ERR(temp) && temp->d_inode) { @@ -489,6 +492,15 @@ static int ovl_create_or_link(struct dentry *dentry, struct inode *inode, if (override_cred) { override_cred->fsuid = inode->i_uid; override_cred->fsgid = inode->i_gid; + if (!hardlink) { + err = security_dentry_create_files_as(dentry, + stat->mode, &dentry->d_name, old_cred, + override_cred); + if (err) { + put_cred(override_cred); + goto out_revert_creds; + } + } put_cred(override_creds(override_cred)); put_cred(override_cred); @@ -499,6 +511,7 @@ static int ovl_create_or_link(struct dentry *dentry, struct inode *inode, err = ovl_create_over_whiteout(dentry, inode, stat, link, hardlink); } +out_revert_creds: revert_creds(old_cred); if (!err) { struct inode *realinode = d_inode(ovl_dentry_upper(dentry)); @@ -996,17 +1009,14 @@ const struct inode_operations ovl_dir_inode_operations = { .symlink = ovl_symlink, .unlink = ovl_unlink, .rmdir = ovl_rmdir, - .rename2 = ovl_rename2, + .rename = ovl_rename2, .link = ovl_link, .setattr = ovl_setattr, .create = ovl_create, .mknod = ovl_mknod, .permission = ovl_permission, .getattr = ovl_dir_getattr, - .setxattr = generic_setxattr, - .getxattr = generic_getxattr, .listxattr = ovl_listxattr, - .removexattr = generic_removexattr, .get_acl = ovl_get_acl, .update_time = ovl_update_time, }; |