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net: atlantic: verify hw_head_ lies within TX buffer ring

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[ Upstream commit 2120b7f4d128433ad8c5f503a9584deba0684901 ]

Bounds check hw_head index provided by NIC to verify it lies
within the TX buffer ring.

Reported-by: Aashay Shringarpure <aashay@google.com>
Reported-by: Yi Chou <yich@google.com>
Reported-by: Shervin Oloumi <enlightened@google.com>
Signed-off-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Grant Grundler 2022-05-09 19:28:26 -07:00 committed by Greg Kroah-Hartman
parent cd66ab20a8
commit 696292b9b5
1 changed files with 7 additions and 0 deletions
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7
drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
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@ -889,6 +889,13 @@ int hw_atl_b0_hw_ring_tx_head_update(struct aq_hw_s *self,
err = -ENXIO; err = -ENXIO;
goto err_exit; goto err_exit;
} }
/* Validate that the new hw_head_ is reasonable. */
if (hw_head_ >= ring->size) {
err = -ENXIO;
goto err_exit;
}
ring->hw_head = hw_head_; ring->hw_head = hw_head_;
err = aq_hw_err_from_flags(self); err = aq_hw_err_from_flags(self);