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SELinux: do not clear f_op when removing entries

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Do not clear f_op when removing entries since it isn't safe to do.

Signed-off-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Stephen Smalley 2007-11-21 09:01:36 -05:00 committed by James Morris
parent e3c0ac04f9
commit 0955dc03ae
1 changed files with 1 additions and 27 deletions
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28
security/selinux/selinuxfs.c
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@ -838,10 +838,6 @@ static ssize_t sel_read_bool(struct file *filep, char __user *buf,
ret = -EFAULT;
/* check to see if this file has been deleted */
if (!filep->f_op)
goto out;
if (count > PAGE_SIZE) {
ret = -EINVAL;
goto out;
@ -882,10 +878,6 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
if (length)
goto out;
/* check to see if this file has been deleted */
if (!filep->f_op)
goto out;
if (count >= PAGE_SIZE) {
length = -ENOMEM;
goto out;
@ -940,10 +932,6 @@ static ssize_t sel_commit_bools_write(struct file *filep,
if (length)
goto out;
/* check to see if this file has been deleted */
if (!filep->f_op)
goto out;
if (count >= PAGE_SIZE) {
length = -ENOMEM;
goto out;
@ -982,11 +970,9 @@ static const struct file_operations sel_commit_bools_ops = {
.write = sel_commit_bools_write,
};
/* partial revoke() from fs/proc/generic.c proc_kill_inodes */
static void sel_remove_entries(struct dentry *de)
{
struct list_head *p, *node;
struct super_block *sb = de->d_sb;
struct list_head *node;
spin_lock(&dcache_lock);
node = de->d_subdirs.next;
@ -1006,18 +992,6 @@ static void sel_remove_entries(struct dentry *de)
}
spin_unlock(&dcache_lock);
file_list_lock();
list_for_each(p, &sb->s_files) {
struct file * filp = list_entry(p, struct file, f_u.fu_list);
struct dentry * dentry = filp->f_path.dentry;
if (dentry->d_parent != de) {
continue;
}
filp->f_op = NULL;
}
file_list_unlock();
}
#define BOOL_DIR_NAME "booleans"