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net: dsa: mv88e6xxx: Fix out-of-bound access

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[ Upstream commit 528876d867a23b5198022baf2e388052ca67c952 ]

If an ATU violation was caused by a CPU Load operation, the SPID could
be larger than DSA_MAX_PORTS (the size of mv88e6xxx_chip.ports[] array).

Fixes: 75c05a74e745 ("net: dsa: mv88e6xxx: Fix counting of ATU violations")
Signed-off-by: Joseph Huang <Joseph.Huang@garmin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20240819235251.1331763-1-Joseph.Huang@garmin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Joseph Huang 2024-08-19 19:52:50 -04:00 • committed by Ksawlii
parent f634cf4b40
commit 2230f96d6c
1 changed files with 2 additions and 1 deletions
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3
drivers/net/dsa/mv88e6xxx/global1_atu.c
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@ -453,7 +453,8 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
trace_mv88e6xxx_atu_full_violation(chip->dev, spid,
entry.portvec, entry.mac,
fid);
chip->ports[spid].atu_full_violation++;
if (spid < ARRAY_SIZE(chip->ports))
chip->ports[spid].atu_full_violation++;
}
mv88e6xxx_reg_unlock(chip);