[PATCH 1/1] platform/x86/intel: Fix uninitialized entry in pmt_crashlog_probe

From: Xiaohui Zhang
Date: Wed Jun 08 2022 - 00:56:06 EST


Similar to the handling of pmt_telem_probe in commit 2cdfa0c20d58
("platform/x86/intel: Fix 'rmmod pmt_telemetry' panic"), we thought
a patch might be needed here as well.

The probe function, pmt_crashlog_probe(), adds an entry for devices even if
they have not been initialized. This results in the array of initialized
devices containing both initialized and uninitialized entries. This
causes a panic in the remove function, pmt_crashlog_remove() which expects
the array to only contain initialized entries.

Only use an entry when a device is initialized.

Signed-off-by: Xiaohui Zhang <xiaohuizhang@xxxxxxxxxx>
---
drivers/platform/x86/intel/pmt/crashlog.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel/pmt/crashlog.c b/drivers/platform/x86/intel/pmt/crashlog.c
index 34daf9df168b..ace1239bc0a0 100644
--- a/drivers/platform/x86/intel/pmt/crashlog.c
+++ b/drivers/platform/x86/intel/pmt/crashlog.c
@@ -282,7 +282,7 @@ static int pmt_crashlog_probe(struct auxiliary_device *auxdev,
auxiliary_set_drvdata(auxdev, priv);

for (i = 0; i < intel_vsec_dev->num_resources; i++) {
- struct intel_pmt_entry *entry = &priv->entry[i].entry;
+ struct intel_pmt_entry *entry = &priv->entry[priv->num_entries].entry;

ret = intel_pmt_dev_create(entry, &pmt_crashlog_ns, intel_vsec_dev, i);
if (ret < 0)
--
2.17.1