wl12xx: fix use after free
When DEBUG_SPI is included in the debug log level wl1271_spi_reset()
will dump the already freed memory instead of the SPI buffer.
This bug was spotted by the semantic patch tool coccinelle using the
script found at scripts/coccinelle/free/kfree.cocci.
More information about semantic patching is available at
http://coccinelle.lip6.fr/
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/wl12xx/spi.c b/drivers/net/wireless/wl12xx/spi.c
index 4671491..7145ea5 100644
--- a/drivers/net/wireless/wl12xx/spi.c
+++ b/drivers/net/wireless/wl12xx/spi.c
@@ -110,9 +110,8 @@
spi_message_add_tail(&t, &m);
spi_sync(wl_to_spi(wl), &m);
- kfree(cmd);
-
wl1271_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
+ kfree(cmd);
}
static void wl1271_spi_init(struct wl1271 *wl)