korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-14 22:44:27 +08:00
Code Issues Packages Projects Releases Wiki Activity

drm/gma500: fix potential NULL pointer dereference dereference

Browse Source 
NULL check at line 528: if (!sender || !data_out || !len_out) {, implies
that pointer _sender_ might be NULL.

Move pointer _sender_ dereference after NULL check in order to avoid a
potential NULL pointer dereference.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20170812015515.GA8360@embeddedgus
This commit is contained in:
Gustavo A. R. Silva 2017-08-11 20:55:15 -05:00 committed by Daniel Vetter
parent f3bbc908e8
commit 3c2c42eb47
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c
View File

@ -520,7 +520,7 @@ static int __read_panel_data(struct mdfld_dsi_pkg_sender *sender, u8 data_type,
u8 *data, u16 len, u32 *data_out, u16 len_out, bool hs)
{
unsigned long flags;
struct drm_device *dev = sender->dev;
struct drm_device *dev;
int i;
u32 gen_data_reg;
int retry = MDFLD_DSI_READ_MAX_COUNT;
@ -530,6 +530,8 @@ static int __read_panel_data(struct mdfld_dsi_pkg_sender *sender, u8 data_type,
return -EINVAL;
}
dev = sender->dev;
/**
* do reading.
* 0) send out generic read request