From 03e7a503561f6d0ef09c7ec73772a7a6f78417d3 Mon Sep 17 00:00:00 2001 From: Rebecca Schultz Zavin Date: Thu, 28 Feb 2013 16:43:13 -0800 Subject: [PATCH] staging: sw_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/sw_sync.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/staging/android/sw_sync.c b/drivers/staging/android/sw_sync.c index d689760..d768893 100644 --- a/drivers/staging/android/sw_sync.c +++ b/drivers/staging/android/sw_sync.c @@ -170,8 +170,13 @@ long sw_sync_ioctl_create_fence(struct sw_sync_timeline *obj, unsigned long arg) struct sync_fence *fence; struct sw_sync_create_fence_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; + } pt = sw_sync_pt_create(obj, data.value); if (pt == NULL) { -- 2.7.4