From 0955dc03aedfb6a5565445b3f2176255b784cc6a Mon Sep 17 00:00:00 2001 From: Stephen Smalley Date: Wed, 21 Nov 2007 09:01:36 -0500 Subject: [PATCH] SELinux: do not clear f_op when removing entries Do not clear f_op when removing entries since it isn't safe to do. Signed-off-by: Stephen Smalley Signed-off-by: James Morris --- security/selinux/selinuxfs.c | 28 +--------------------------- 1 file changed, 1 insertion(+), 27 deletions(-) diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c index f5f3e6da5d..ac6fe99bd3 100644 --- a/security/selinux/selinuxfs.c +++ b/security/selinux/selinuxfs.c @@ -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" -- 2.39.5