From 92ea915adb5565b522902a7b3f0a33ede16bb797 Mon Sep 17 00:00:00 2001 From: Rebecca Schultz Zavin Date: Thu, 28 Feb 2013 16:43:12 -0800 Subject: [PATCH] staging: sync: Fix error paths Check the return value of get_unused_fd to make sure a valid file descriptor is returned. Make sure to call put_unused_fd even if an error occurs before the fd can be used. Cc: Maarten Lankhorst Cc: Erik Gilling Cc: Daniel Vetter Cc: Rob Clark Cc: Sumit Semwal Cc: dri-devel@lists.freedesktop.org Cc: Android Kernel Team Signed-off-by: Rebecca Schultz Zavin Signed-off-by: John Stultz Signed-off-by: Greg Kroah-Hartman --- drivers/staging/android/sync.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c index 61c27bdc5d0b..c4a3c1d7946c 100644 --- a/drivers/staging/android/sync.c +++ b/drivers/staging/android/sync.c @@ -647,8 +647,13 @@ static long sync_fence_ioctl_merge(struct sync_fence *fence, unsigned long arg) struct sync_fence *fence2, *fence3; struct sync_merge_data data; - if (copy_from_user(&data, (void __user *)arg, sizeof(data))) - return -EFAULT; + if (fd < 0) + return fd; + + if (copy_from_user(&data, (void __user *)arg, sizeof(data))) { + err = -EFAULT; + goto err_put_fd; + } fence2 = sync_fence_fdget(data.fd2); if (fence2 == NULL) { -- 2.30.2