From: Bjorn Andersson Date: Fri, 10 Jun 2016 00:22:56 +0000 (-0700) Subject: soc: qcom: smp2p: Correct addressing of outgoing value X-Git-Tag: v4.8-rc1~67^2~20^2~4 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=63af8e44eaa56ffe613628742a2642c4c2f1a029;p=linux.git soc: qcom: smp2p: Correct addressing of outgoing value The valid_entries index should not be incremented until after we have acquired the pointer to the value, or we will read and write data one item off. Fixes: 50e99641413e ("soc: qcom: smp2p: Qualcomm Shared Memory Point to Point") Cc: stable@vger.kernel.org Signed-off-by: Bjorn Andersson Signed-off-by: Andy Gross --- diff --git a/drivers/soc/qcom/smp2p.c b/drivers/soc/qcom/smp2p.c index f1eed7f9dd67..9c2788b8f2c3 100644 --- a/drivers/soc/qcom/smp2p.c +++ b/drivers/soc/qcom/smp2p.c @@ -344,11 +344,12 @@ static int qcom_smp2p_outbound_entry(struct qcom_smp2p *smp2p, /* Allocate an entry from the smem item */ strlcpy(buf, entry->name, SMP2P_MAX_ENTRY_NAME); memcpy_toio(out->entries[out->valid_entries].name, buf, SMP2P_MAX_ENTRY_NAME); - out->valid_entries++; /* Make the logical entry reference the physical value */ entry->value = &out->entries[out->valid_entries].value; + out->valid_entries++; + entry->state = qcom_smem_state_register(node, &smp2p_state_ops, entry); if (IS_ERR(entry->state)) { dev_err(smp2p->dev, "failed to register qcom_smem_state\n");