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authorChristophe JAILLET <christophe.jaillet@wanadoo.fr>2018-04-07 01:36:11 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2018-04-07 01:39:18 +0300
commit839c42273617787318da7baf6151d553108f5e17 (patch)
treecf916a04b3632b742374f3f19c6222d6856848d6 /drivers/input/rmi4
parent664b0bae0b87f69bc9deb098f5e0158b9cf18e04 (diff)
downloadlinux-839c42273617787318da7baf6151d553108f5e17.tar.xz
Input: synaptics-rmi4 - fix an unchecked out of memory error path
When extending the rmi_spi buffers, we must check that no out of memory error occurs, otherwise we may access data above the currently allocated memory. Propagate the error code returned by 'rmi_spi_manage_pools()' instead. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Andrew Duggan <aduggan@synaptics.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/rmi4')
-rw-r--r--drivers/input/rmi4/rmi_spi.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/input/rmi4/rmi_spi.c b/drivers/input/rmi4/rmi_spi.c
index 76edbf2c1bce..082defc329a8 100644
--- a/drivers/input/rmi4/rmi_spi.c
+++ b/drivers/input/rmi4/rmi_spi.c
@@ -147,8 +147,11 @@ static int rmi_spi_xfer(struct rmi_spi_xport *rmi_spi,
if (len > RMI_SPI_XFER_SIZE_LIMIT)
return -EINVAL;
- if (rmi_spi->xfer_buf_size < len)
- rmi_spi_manage_pools(rmi_spi, len);
+ if (rmi_spi->xfer_buf_size < len) {
+ ret = rmi_spi_manage_pools(rmi_spi, len);
+ if (ret < 0)
+ return ret;
+ }
if (addr == 0)
/*