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authorAl Viro <viro@ftp.linux.org.uk>2007-03-12 16:17:58 +0000
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-14 15:27:48 -0700
commit04ff97086b1a3237bbd1fe6390fa80fe75207e23 (patch)
tree877e26055759d84a726c6bc68245bc6f9a4a5753 /fs/proc
parentc4823bce033be74c0fcfbcae2f1be0854fdc2e18 (diff)
[PATCH] sanitize security_getprocattr() API
have it return the buffer it had allocated Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/base.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 01f7769da8e..989af5e55d1 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1558,29 +1558,20 @@ static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
size_t count, loff_t *ppos)
{
struct inode * inode = file->f_path.dentry->d_inode;
- unsigned long page;
+ char *p = NULL;
ssize_t length;
struct task_struct *task = get_proc_task(inode);
- length = -ESRCH;
if (!task)
- goto out_no_task;
-
- if (count > PAGE_SIZE)
- count = PAGE_SIZE;
- length = -ENOMEM;
- if (!(page = __get_free_page(GFP_KERNEL)))
- goto out;
+ return -ESRCH;
length = security_getprocattr(task,
(char*)file->f_path.dentry->d_name.name,
- (void*)page, count);
- if (length >= 0)
- length = simple_read_from_buffer(buf, count, ppos, (char *)page, length);
- free_page(page);
-out:
+ &p);
put_task_struct(task);
-out_no_task:
+ if (length > 0)
+ length = simple_read_from_buffer(buf, count, ppos, p, length);
+ kfree(p);
return length;
}