Skip to content

Fix potential vulnerability in a cloned function #211

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
npt-1707 wants to merge 1 commit into
base: oculus-go-kernel-master
Choose a base branch
from
Open

Fix potential vulnerability in a cloned function #211

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
32 changes: 15 additions & 17 deletions net/irda/irqueue.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -385,9 +385,6 @@ EXPORT_SYMBOL(hashbin_new);
* for deallocating this structure if it's complex. If not the user can
* just supply kfree, which should take care of the job.
*/
#ifdef CONFIG_LOCKDEP
static int hashbin_lock_depth = 0;
#endif
int hashbin_delete( hashbin_t* hashbin, FREE_FUNC free_func)
{
irda_queue_t* queue;
Expand All @@ -398,22 +395,26 @@ int hashbin_delete( hashbin_t* hashbin, FREE_FUNC free_func)
IRDA_ASSERT(hashbin->magic == HB_MAGIC, return -1;);

/* Synchronize */
if ( hashbin->hb_type & HB_LOCK ) {
spin_lock_irqsave_nested(&hashbin->hb_spinlock, flags,
hashbin_lock_depth++);
}
if (hashbin->hb_type & HB_LOCK)
spin_lock_irqsave(&hashbin->hb_spinlock, flags);

/*
* Free the entries in the hashbin, TODO: use hashbin_clear when
* it has been shown to work
*/
for (i = 0; i < HASHBIN_SIZE; i ++ ) {
queue = dequeue_first((irda_queue_t**) &hashbin->hb_queue[i]);
while (queue ) {
if (free_func)
(*free_func)(queue);
queue = dequeue_first(
(irda_queue_t**) &hashbin->hb_queue[i]);
while (1) {
queue = dequeue_first((irda_queue_t**) &hashbin->hb_queue[i]);

if (!queue)
break;

if (free_func) {
if (hashbin->hb_type & HB_LOCK)
spin_unlock_irqrestore(&hashbin->hb_spinlock, flags);
free_func(queue);
if (hashbin->hb_type & HB_LOCK)
spin_lock_irqsave(&hashbin->hb_spinlock, flags);
}
}

Expand All @@ -422,11 +423,8 @@ int hashbin_delete( hashbin_t* hashbin, FREE_FUNC free_func)
hashbin->magic = ~HB_MAGIC;

/* Release lock */
if ( hashbin->hb_type & HB_LOCK) {
if (hashbin->hb_type & HB_LOCK)
spin_unlock_irqrestore(&hashbin->hb_spinlock, flags);
#ifdef CONFIG_LOCKDEP
hashbin_lock_depth--;
#endif
}

/*
Expand Down