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| author |   Anton Vasilyev <vasilyev@ispras.ru> | 2018-08-01 14:26:51 +0300 |
|---|---|---|
| committer |   Jiri Kosina <jkosina@suse.cz> | 2018-08-02 13:27:54 +0200 |
| commit | 50fa92594a2bc76265f4bb357f9a25dd3bdb2c0a (patch) | |
| tree | c5a30ab184359bf83808e116c5ef975330e4c0f5 /drivers/hid | |
| parent | HID: intel-ish-hid: Prevent loading of driver on Mehlow (diff) | |
| download | linux-dev-50fa92594a2bc76265f4bb357f9a25dd3bdb2c0a.tar.xz linux-dev-50fa92594a2bc76265f4bb357f9a25dd3bdb2c0a.zip | |
HID: intel_ish-hid: tx_buf memory leak on probe/remove
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@ispras.ru>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/intel-ish-hid/ipc/ipc.c | 9 | ||||
| -rw-r--r-- | 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 4a55eab39b88..050f9872f5c0 100644 --- a/drivers/hid/intel-ish-hid/ipc/pci-ish.c +++ b/drivers/hid/intel-ish-hid/ipc/pci-ish.c @@ -183,7 +183,6 @@ free_irq: free_irq(pdev->irq, dev); free_device: pci_iounmap(pdev, hw->mem_addr); - kfree(dev); release_regions: pci_release_regions(pdev); disable_device: @@ -213,7 +212,6 @@ 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; |