From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit 4894edacfa93d7046bec4fc61fc402ac6a2ac9e8 ]
Smatch complains that there is a double free in probe:
drivers/net/wireless/microchip/wilc1000/spi.c:186 wilc_bus_probe() error: double free of 'spi_priv' drivers/net/wireless/microchip/wilc1000/sdio.c:163 wilc_sdio_probe() error: double free of 'sdio_priv'
The problem is that wilc_netdev_cleanup() function frees "wilc->bus_data". That's confusing and a layering violation. Leave the frees in probe(), delete the free in wilc_netdev_cleanup(), and add some new frees to the remove() functions.
Fixes: dc8b338f3bcd ("wilc1000: use goto labels on error path") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Reviewed-by: Claudiu Beznea claudiu.beznea@microchip.com Signed-off-by: Kalle Valo kvalo@kernel.org Link: https://lore.kernel.org/r/20211217150311.GC16611@kili Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/microchip/wilc1000/netdev.c | 1 - drivers/net/wireless/microchip/wilc1000/sdio.c | 2 ++ drivers/net/wireless/microchip/wilc1000/spi.c | 2 ++ 3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/microchip/wilc1000/netdev.c b/drivers/net/wireless/microchip/wilc1000/netdev.c index 690572e01a2a7..b5fe2a7cd8dcc 100644 --- a/drivers/net/wireless/microchip/wilc1000/netdev.c +++ b/drivers/net/wireless/microchip/wilc1000/netdev.c @@ -905,7 +905,6 @@ void wilc_netdev_cleanup(struct wilc *wilc)
wilc_wlan_cfg_deinit(wilc); wlan_deinit_locks(wilc); - kfree(wilc->bus_data); wiphy_unregister(wilc->wiphy); wiphy_free(wilc->wiphy); } diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c index 26ebf66643425..ec595dbd89592 100644 --- a/drivers/net/wireless/microchip/wilc1000/sdio.c +++ b/drivers/net/wireless/microchip/wilc1000/sdio.c @@ -167,9 +167,11 @@ free: static void wilc_sdio_remove(struct sdio_func *func) { struct wilc *wilc = sdio_get_drvdata(func); + struct wilc_sdio *sdio_priv = wilc->bus_data;
clk_disable_unprepare(wilc->rtc_clk); wilc_netdev_cleanup(wilc); + kfree(sdio_priv); }
static int wilc_sdio_reset(struct wilc *wilc) diff --git a/drivers/net/wireless/microchip/wilc1000/spi.c b/drivers/net/wireless/microchip/wilc1000/spi.c index 640850f989dd9..d8e893f4dab4f 100644 --- a/drivers/net/wireless/microchip/wilc1000/spi.c +++ b/drivers/net/wireless/microchip/wilc1000/spi.c @@ -190,9 +190,11 @@ free: static int wilc_bus_remove(struct spi_device *spi) { struct wilc *wilc = spi_get_drvdata(spi); + struct wilc_spi *spi_priv = wilc->bus_data;
clk_disable_unprepare(wilc->rtc_clk); wilc_netdev_cleanup(wilc); + kfree(spi_priv);
return 0; }