From: Joseph Huang Joseph.Huang@garmin.com

stable inclusion from stable-v6.6.48 commit f7d8c2fabd39250cf2333fbf8eef67e837f90a5d category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAOXZQ CVE: CVE-2024-44988

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

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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 Signed-off-by: Zhengchao Shao shaozhengchao@huawei.com Signed-off-by: Zhang Changzhong zhangchangzhong@huawei.com --- drivers/net/dsa/mv88e6xxx/global1_atu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/global1_atu.c b/drivers/net/dsa/mv88e6xxx/global1_atu.c index ce3b369..c47f068 100644 --- a/drivers/net/dsa/mv88e6xxx/global1_atu.c +++ b/drivers/net/dsa/mv88e6xxx/global1_atu.c @@ -457,7 +457,8 @@ 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++; }

return IRQ_HANDLED;