Am 08.04.25 um 13:01 schrieb Dan Carpenter:

Call dma_fence_put(fence) before returning an error if dma_fence_to_sync_pt() fails. Use an unwind ladder at the end of the function to do the cleanup.

Fixes: 70e67aaec2f4 ("dma-buf/sw_sync: Add fence deadline support") Signed-off-by: Dan Carpenter dan.carpenter@linaro.org

Reviewed and pushed to drm-misc-fixes.

Sorry for the delay, I was fighting a bit with dim after the migration.

Thanks, Christian.

---

v2: style changes.

drivers/dma-buf/sw_sync.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/dma-buf/sw_sync.c b/drivers/dma-buf/sw_sync.c index f5905d67dedb..22a808995f10 100644 --- a/drivers/dma-buf/sw_sync.c +++ b/drivers/dma-buf/sw_sync.c @@ -438,15 +438,17 @@ static int sw_sync_ioctl_get_deadline(struct sync_timeline *obj, unsigned long a return -EINVAL; pt = dma_fence_to_sync_pt(fence);

• if (!pt)

• return -EINVAL;
  

• if (!pt) {

• ret = -EINVAL;
  

• goto put_fence;
  

• }

spin_lock_irqsave(fence->lock, flags);

• if (test_bit(SW_SYNC_HAS_DEADLINE_BIT, &fence->flags)) {

• data.deadline_ns = ktime_to_ns(pt->deadline);
  

• } else {

• if (!test_bit(SW_SYNC_HAS_DEADLINE_BIT, &fence->flags)) { ret = -ENOENT;

• goto unlock;
  

  }
• data.deadline_ns = ktime_to_ns(pt->deadline); spin_unlock_irqrestore(fence->lock, flags);

dma_fence_put(fence); @@ -458,6 +460,13 @@ static int sw_sync_ioctl_get_deadline(struct sync_timeline *obj, unsigned long a return -EFAULT; return 0;

+unlock:

• spin_unlock_irqrestore(fence->lock, flags);

+put_fence:

• dma_fence_put(fence);
• return ret;

} static long sw_sync_ioctl(struct file *file, unsigned int cmd,