diff options
| author | Baihan Li <libaihan@huawei.com> | 2025-08-13 17:42:30 +0800 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> | 2025-08-17 18:22:05 +0300 |
| commit | 8bed4ec42a4e0dc8113172696ff076d1eb6d8bcb (patch) | |
| tree | 0533c21b0038801931dea6052adb3c2a94c92738 | |
| parent | e5f48bfa2ae0806d5f51fb8061afc619a73599a7 (diff) | |
drm/hisilicon/hibmc: fix irq_request()'s irq name variable is local
The local variable is passed in request_irq (), and there will be use
after free problem, which will make request_irq failed. Using the global
irq name instead of it to fix.
Fixes: b11bc1ae4658 ("drm/hisilicon/hibmc: Add MSI irq getting and requesting for HPD")
Signed-off-by: Baihan Li <libaihan@huawei.com>
Signed-off-by: Yongbang Shi <shiyongbang@huawei.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250813094238.3722345-4-shiyongbang@huawei.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
| -rw-r--r-- | drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c index 768b97f9e74a..4cdcc34070ee 100644 --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c @@ -32,7 +32,7 @@ DEFINE_DRM_GEM_FOPS(hibmc_fops); -static const char *g_irqs_names_map[HIBMC_MAX_VECTORS] = { "vblank", "hpd" }; +static const char *g_irqs_names_map[HIBMC_MAX_VECTORS] = { "hibmc-vblank", "hibmc-hpd" }; static irqreturn_t hibmc_interrupt(int irq, void *arg) { @@ -277,7 +277,6 @@ static void hibmc_unload(struct drm_device *dev) static int hibmc_msi_init(struct drm_device *dev) { struct pci_dev *pdev = to_pci_dev(dev->dev); - char name[32] = {0}; int valid_irq_num; int irq; int ret; @@ -292,9 +291,6 @@ static int hibmc_msi_init(struct drm_device *dev) valid_irq_num = ret; for (int i = 0; i < valid_irq_num; i++) { - snprintf(name, ARRAY_SIZE(name) - 1, "%s-%s-%s", - dev->driver->name, pci_name(pdev), g_irqs_names_map[i]); - irq = pci_irq_vector(pdev, i); if (i) @@ -302,10 +298,10 @@ static int hibmc_msi_init(struct drm_device *dev) ret = devm_request_threaded_irq(&pdev->dev, irq, hibmc_dp_interrupt, hibmc_dp_hpd_isr, - IRQF_SHARED, name, dev); + IRQF_SHARED, g_irqs_names_map[i], dev); else ret = devm_request_irq(&pdev->dev, irq, hibmc_interrupt, - IRQF_SHARED, name, dev); + IRQF_SHARED, g_irqs_names_map[i], dev); if (ret) { drm_err(dev, "install irq failed: %d\n", ret); return ret; |