diff options
| -rw-r--r-- | fs/autofs/root.c | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/fs/autofs/root.c b/fs/autofs/root.c index a3d414150578..782e57b911ab 100644 --- a/fs/autofs/root.c +++ b/fs/autofs/root.c @@ -559,6 +559,13 @@ static int autofs_dir_symlink(struct inode *dir, if (!autofs_oz_mode(sbi)) return -EACCES; + /* autofs_oz_mode() needs to allow path walks when the + * autofs mount is catatonic but the state of an autofs + * file system needs to be preserved over restarts. + */ + if (sbi->catatonic) + return -EACCES; + BUG_ON(!ino); autofs_clean_ino(ino); @@ -612,9 +619,15 @@ static int autofs_dir_unlink(struct inode *dir, struct dentry *dentry) struct autofs_info *ino = autofs_dentry_ino(dentry); struct autofs_info *p_ino; - /* This allows root to remove symlinks */ - if (!autofs_oz_mode(sbi) && !capable(CAP_SYS_ADMIN)) - return -EPERM; + if (!autofs_oz_mode(sbi)) + return -EACCES; + + /* autofs_oz_mode() needs to allow path walks when the + * autofs mount is catatonic but the state of an autofs + * file system needs to be preserved over restarts. + */ + if (sbi->catatonic) + return -EACCES; if (atomic_dec_and_test(&ino->count)) { p_ino = autofs_dentry_ino(dentry->d_parent); @@ -697,6 +710,13 @@ static int autofs_dir_rmdir(struct inode *dir, struct dentry *dentry) if (!autofs_oz_mode(sbi)) return -EACCES; + /* autofs_oz_mode() needs to allow path walks when the + * autofs mount is catatonic but the state of an autofs + * file system needs to be preserved over restarts. + */ + if (sbi->catatonic) + return -EACCES; + spin_lock(&sbi->lookup_lock); if (!simple_empty(dentry)) { spin_unlock(&sbi->lookup_lock); @@ -735,6 +755,13 @@ static int autofs_dir_mkdir(struct inode *dir, if (!autofs_oz_mode(sbi)) return -EACCES; + /* autofs_oz_mode() needs to allow path walks when the + * autofs mount is catatonic but the state of an autofs + * file system needs to be preserved over restarts. + */ + if (sbi->catatonic) + return -EACCES; + pr_debug("dentry %p, creating %pd\n", dentry, dentry); BUG_ON(!ino); |