ish_dev_init() allocates 512*176 bytes memory for tx_buf and stores it at
&dev->wr_free_list_head.link list on ish_probe().
But there is no deallocation of this memory in ish_remove() and in
ish_probe() error path.
So current intel-ish-ipc provides 88 KB memory leak for each
probe/release.
The patch replaces kzalloc allocation by devm_kzalloc and removes
ishtp_device *dev deallocation by kfree.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Anton Vasilyev <vasilyev@xxxxxxxxx>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
---
v2: Fix align for multi line statements
---
drivers/hid/intel-ish-hid/ipc/ipc.c | 9 ++++++---
drivers/hid/intel-ish-hid/ipc/pci-ish.c | 2 --
2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/hid/intel-ish-hid/ipc/ipc.c b/drivers/hid/intel-ish-hid/ipc/ipc.c
index 9a60ec13cb10..bfbca7ec54ce 100644
--- a/drivers/hid/intel-ish-hid/ipc/ipc.c
+++ b/drivers/hid/intel-ish-hid/ipc/ipc.c
@@ -907,8 +907,9 @@ struct ishtp_device *ish_dev_init(struct pci_dev *pdev)
struct ishtp_device *dev;
int i;
- dev = kzalloc(sizeof(struct ishtp_device) + sizeof(struct ish_hw),
- GFP_KERNEL);
+ dev = devm_kzalloc(&pdev->dev,
+ sizeof(struct ishtp_device) + sizeof(struct ish_hw),
+ GFP_KERNEL);
if (!dev)
return NULL;
@@ -925,7 +926,9 @@ struct ishtp_device *ish_dev_init(struct pci_dev *pdev)
for (i = 0; i < IPC_TX_FIFO_SIZE; ++i) {
struct wr_msg_ctl_info *tx_buf;
- tx_buf = kzalloc(sizeof(struct wr_msg_ctl_info), GFP_KERNEL);
+ tx_buf = devm_kzalloc(&pdev->dev,
+ sizeof(struct wr_msg_ctl_info),
+ GFP_KERNEL);
if (!tx_buf) {
/*
* IPC buffers may be limited or not available
diff --git a/drivers/hid/intel-ish-hid/ipc/pci-ish.c b/drivers/hid/intel-ish-hid/ipc/pci-ish.c
index a2c53ea3b5ed..81d035a480bc 100644
--- a/drivers/hid/intel-ish-hid/ipc/pci-ish.c
+++ b/drivers/hid/intel-ish-hid/ipc/pci-ish.c
@@ -172,7 +172,6 @@ static int ish_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
free_irq(pdev->irq, dev);
free_device:
pci_iounmap(pdev, hw->mem_addr);
- kfree(dev);
release_regions:
pci_release_regions(pdev);
disable_device:
@@ -202,7 +201,6 @@ static void ish_remove(struct pci_dev *pdev)
pci_release_regions(pdev);
pci_clear_master(pdev);
pci_disable_device(pdev);
- kfree(ishtp_dev);
}
static struct device __maybe_unused *ish_resume_device;
--
2.18.0
--
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