4.19-stable review patch. If anyone has any objections, please let me know.
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From: Luca Ceresoli luca@lucaceresoli.net
commit cea8c0077d6cf3a0cea2f18a8e914af78d46b2ff upstream.
imx274_read_reg() takes a u8 pointer ("reg") and casts it to pass it to regmap_read(), which takes an unsigned int pointer. This results in a corrupted stack and random crashes.
Fixes: 0985dd306f72 ("media: imx274: V4l2 driver for Sony imx274 CMOS sensor")
Cc: stable@vger.kernel.org # for 4.15 and up Signed-off-by: Luca Ceresoli luca@lucaceresoli.net Signed-off-by: Sakari Ailus sakari.ailus@linux.intel.com Signed-off-by: Mauro Carvalho Chehab mchehab+samsung@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/media/i2c/imx274.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/media/i2c/imx274.c +++ b/drivers/media/i2c/imx274.c @@ -636,16 +636,19 @@ static int imx274_write_table(struct sti
static inline int imx274_read_reg(struct stimx274 *priv, u16 addr, u8 *val) { + unsigned int uint_val; int err;
- err = regmap_read(priv->regmap, addr, (unsigned int *)val); + err = regmap_read(priv->regmap, addr, &uint_val); if (err) dev_err(&priv->client->dev, "%s : i2c read failed, addr = %x\n", __func__, addr); else dev_dbg(&priv->client->dev, "%s : addr 0x%x, val=0x%x\n", __func__, - addr, *val); + addr, uint_val); + + *val = uint_val; return err; }