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net: stmmac: Fix incorrect dereference in interrupt handlers 

[ Upstream commit 97dde84026339e4b4af9a6301f825d1828d7874b ]

If 'dev' or 'data' is NULL, the 'priv' variable has an incorrect address
when dereferencing calling netdev_err().

Since we get as 'dev_id' or 'data' what was passed as the 'dev' argument
to request_irq() during interrupt initialization (that is, the net_device
and rx/tx queue pointers initialized at the time of the call) and since
there are usually no checks for the 'dev_id' argument in such handlers
in other drivers, remove these checks from the handlers in stmmac driver.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 8532f613bc ("net: stmmac: introduce MSI Interrupt routines for mac, safety, RX & TX")
Signed-off-by: Pavel Sakharov <p.sakharov@ispras.ru>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pavel Sakharov 2024-02-14 12:27:17 +03:00 committed by Greg Kroah-Hartman
parent 3a0060d2ba
commit 37067e6bc2
1 changed files with 0 additions and 20 deletions
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20
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -5951,11 +5951,6 @@ static irqreturn_t stmmac_mac_interrupt(int irq, void *dev_id)
struct net_device *dev = (struct net_device *)dev_id;
struct stmmac_priv *priv = netdev_priv(dev);
if (unlikely(!dev)) {
netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__);
return IRQ_NONE;
}
/* Check if adapter is up */
if (test_bit(STMMAC_DOWN, &priv->state))
return IRQ_HANDLED;
@ -5971,11 +5966,6 @@ static irqreturn_t stmmac_safety_interrupt(int irq, void *dev_id)
struct net_device *dev = (struct net_device *)dev_id;
struct stmmac_priv *priv = netdev_priv(dev);
if (unlikely(!dev)) {
netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__);
return IRQ_NONE;
}
/* Check if adapter is up */
if (test_bit(STMMAC_DOWN, &priv->state))
return IRQ_HANDLED;
@ -5997,11 +5987,6 @@ static irqreturn_t stmmac_msi_intr_tx(int irq, void *data)
dma_conf = container_of(tx_q, struct stmmac_dma_conf, tx_queue[chan]);
priv = container_of(dma_conf, struct stmmac_priv, dma_conf);
if (unlikely(!data)) {
netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__);
return IRQ_NONE;
}
/* Check if adapter is up */
if (test_bit(STMMAC_DOWN, &priv->state))
return IRQ_HANDLED;
@ -6028,11 +6013,6 @@ static irqreturn_t stmmac_msi_intr_rx(int irq, void *data)
dma_conf = container_of(rx_q, struct stmmac_dma_conf, rx_queue[chan]);
priv = container_of(dma_conf, struct stmmac_priv, dma_conf);
if (unlikely(!data)) {
netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__);
return IRQ_NONE;
}
/* Check if adapter is up */
if (test_bit(STMMAC_DOWN, &priv->state))
return IRQ_HANDLED;