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| author | Kévin L'hôpital <kevin.lhopital@savoirfairelinux.com> | 2024-03-07 14:19:06 +0300 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2024-03-27 01:19:39 +0300 |
| commit | 589ec16174dd9378953b8232ae76fad0a96e1563 (patch) | |
| tree | 5cdf445d12af6e429322157081366f2ac02c7539 | |
| parent | c4c857723b37c20651300b3de4ff25059848b4b0 (diff) | |
| download | linux-589ec16174dd9378953b8232ae76fad0a96e1563.tar.xz | |
net: phy: fix phy_get_internal_delay accessing an empty array
[ Upstream commit 4469c0c5b14a0919f5965c7ceac96b523eb57b79 ]
The phy_get_internal_delay function could try to access to an empty
array in the case that the driver is calling phy_get_internal_delay
without defining delay_values and rx-internal-delay-ps or
tx-internal-delay-ps is defined to 0 in the device-tree.
This will lead to "unable to handle kernel NULL pointer dereference at
virtual address 0". To avoid this kernel oops, the test should be delay
>= 0. As there is already delay < 0 test just before, the test could
only be size == 0.
Fixes: 92252eec913b ("net: phy: Add a helper to return the index for of the internal delay")
Co-developed-by: Enguerrand de Ribaucourt <enguerrand.de-ribaucourt@savoirfairelinux.com>
Signed-off-by: Enguerrand de Ribaucourt <enguerrand.de-ribaucourt@savoirfairelinux.com>
Signed-off-by: Kévin L'hôpital <kevin.lhopital@savoirfairelinux.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/phy/phy_device.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index a42df2c1bd04..bbc459f97b7b 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -2954,7 +2954,7 @@ s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev, if (delay < 0) return delay; - if (delay && size == 0) + if (size == 0) return delay; if (delay < delay_values[0] || delay > delay_values[size - 1]) { |