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| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2024-06-22 01:03:40 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-08-03 08:59:22 +0200 |
| commit | 8543269567e2fb3d976a8255c5e348aed14f98bc (patch) | |
| tree | 301407bdcb5a6fbd148aa7b93c3c78d677c531c3 | |
| parent | 4100d4d019f8e140be1d4d3a9d8d93c1285f5d1c (diff) | |
| download | linux-stable-8543269567e2fb3d976a8255c5e348aed14f98bc.tar.gz linux-stable-8543269567e2fb3d976a8255c5e348aed14f98bc.tar.bz2 linux-stable-8543269567e2fb3d976a8255c5e348aed14f98bc.zip | |
soc: qcom: pdr: protect locator_addr with the main mutex
[ Upstream commit 107924c14e3ddd85119ca43c26a4ee1056fa9b84 ]
If the service locator server is restarted fast enough, the PDR can
rewrite locator_addr fields concurrently. Protect them by placing
modification of those fields under the main pdr->lock.
Fixes: fbe639b44a82 ("soc: qcom: Introduce Protection Domain Restart helpers")
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Tested-by: Steev Klimaszewski <steev@kali.org>
Tested-by: Alexey Minnekhanov <alexeymin@postmarketos.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240622-qcom-pd-mapper-v9-1-a84ee3591c8e@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/soc/qcom/pdr_interface.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/soc/qcom/pdr_interface.c b/drivers/soc/qcom/pdr_interface.c index a1b6a4081dea..76a62c2ecc58 100644 --- a/drivers/soc/qcom/pdr_interface.c +++ b/drivers/soc/qcom/pdr_interface.c @@ -76,12 +76,12 @@ static int pdr_locator_new_server(struct qmi_handle *qmi, locator_hdl); struct pdr_service *pds; + mutex_lock(&pdr->lock); /* Create a local client port for QMI communication */ pdr->locator_addr.sq_family = AF_QIPCRTR; pdr->locator_addr.sq_node = svc->node; pdr->locator_addr.sq_port = svc->port; - mutex_lock(&pdr->lock); pdr->locator_init_complete = true; mutex_unlock(&pdr->lock); @@ -104,10 +104,10 @@ static void pdr_locator_del_server(struct qmi_handle *qmi, mutex_lock(&pdr->lock); pdr->locator_init_complete = false; - mutex_unlock(&pdr->lock); pdr->locator_addr.sq_node = 0; pdr->locator_addr.sq_port = 0; + mutex_unlock(&pdr->lock); } static const struct qmi_ops pdr_locator_ops = { @@ -365,12 +365,14 @@ static int pdr_get_domain_list(struct servreg_get_domain_list_req *req, if (ret < 0) return ret; + mutex_lock(&pdr->lock); ret = qmi_send_request(&pdr->locator_hdl, &pdr->locator_addr, &txn, SERVREG_GET_DOMAIN_LIST_REQ, SERVREG_GET_DOMAIN_LIST_REQ_MAX_LEN, servreg_get_domain_list_req_ei, req); + mutex_unlock(&pdr->lock); if (ret < 0) { qmi_txn_cancel(&txn); return ret; |