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authorDan Carpenter <dan.carpenter@oracle.com>2018-03-29 12:14:40 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-04-23 13:14:37 +0300
commit361f2ddbb0c9f9b4f336025a7bd0212cea4a34f0 (patch)
tree148d33131fd6ce99220d633e5d0a7a6941d0ac6f /drivers/android
parent6d08b06e67cd117f6992c46611dfb4ce267cd71e (diff)
downloadlinux-361f2ddbb0c9f9b4f336025a7bd0212cea4a34f0.tar.xz
ANDROID: binder: re-order some conditions
It doesn't make any difference to runtime but I've switched these two checks to make my static checker happy. The problem is that "buffer->data_size" is user controlled and if it's less than "sizeo(*hdr)" then that means "offset" can be more than "buffer->data_size". It's just cleaner to check it in the other order. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Martijn Coenen <maco@android.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/android')
-rw-r--r--drivers/android/binder.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 764b63a5aade..00322b146469 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -2058,8 +2058,8 @@ static size_t binder_validate_object(struct binder_buffer *buffer, u64 offset)
struct binder_object_header *hdr;
size_t object_size = 0;
- if (offset > buffer->data_size - sizeof(*hdr) ||
- buffer->data_size < sizeof(*hdr) ||
+ if (buffer->data_size < sizeof(*hdr) ||
+ offset > buffer->data_size - sizeof(*hdr) ||
!IS_ALIGNED(offset, sizeof(u32)))
return 0;