diff options
| author | Andrzej Pietrasiewicz <andrzej.p@samsung.com> | 2015-01-16 17:14:27 +0300 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-01-19 21:54:22 +0300 |
| commit | 06ab8b04d232c80cb4b23984290ce413058cc975 (patch) | |
| tree | f4bb0030c473818065a5b2ffc3754ec1e7f3b890 /drivers/usb/gadget/function/uvc_configfs.c | |
| parent | 16272ae77e0f167af70eabd476059137d64569a8 (diff) | |
| download | linux-06ab8b04d232c80cb4b23984290ce413058cc975.tar.xz | |
usb: gadget: uvc: preserve the address passed to kfree()
__uvcg_fill_strm() called from __uvcg_iter_stream_cls()
might have advanced the "data" even if __uvcg_iter_stream_cls()
returns an error, so use a backup copy as an argument to kfree().
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget/function/uvc_configfs.c')
| -rw-r--r-- | drivers/usb/gadget/function/uvc_configfs.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c index cc2a6139b2c8..49f25e806e38 100644 --- a/drivers/usb/gadget/function/uvc_configfs.c +++ b/drivers/usb/gadget/function/uvc_configfs.c @@ -2086,7 +2086,7 @@ static int uvcg_streaming_class_allow_link(struct config_item *src, struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex; struct uvc_descriptor_header ***class_array, **cl_arr; struct uvcg_streaming_header *target_hdr; - void *data; + void *data, *data_save; size_t size = 0, count = 0; int ret = -EINVAL; @@ -2119,7 +2119,7 @@ static int uvcg_streaming_class_allow_link(struct config_item *src, goto unlock; } - data = kzalloc(size, GFP_KERNEL); + data = data_save = kzalloc(size, GFP_KERNEL); if (!data) { kfree(*class_array); *class_array = NULL; @@ -2132,7 +2132,11 @@ static int uvcg_streaming_class_allow_link(struct config_item *src, if (ret) { kfree(*class_array); *class_array = NULL; - kfree(data); + /* + * __uvcg_fill_strm() called from __uvcg_iter_stream_cls() + * might have advanced the "data", so use a backup copy + */ + kfree(data_save); goto unlock; } *cl_arr = (struct uvc_descriptor_header *)&opts->uvc_color_matching; |