From 3db2c886701dd2fcd75b8f5e5b9a4d23065713c4 Mon Sep 17 00:00:00 2001 From: Xiongfeng Wang Date: Fri, 11 Nov 2022 18:00:36 +0800 Subject: [PATCH] crypto: hisilicon/qm - add missing pci_dev_put() in q_num_set() mainline inclusion from mainline-v6.2-rc1 commit cc7710d0d4ebc6998f04035cde4f32c5ddbe9d7f category: bugfix bugzilla: https://gitee/com/openeuler/kernel/issues/16VW8E CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc7710d0d4ebc6998f04035cde4f32c5ddbe9d7f ------------------------------------------------------------------- pci_get_device() will increase the reference count for the returned pci_dev. We need to use pci_dev_put() to decrease the reference count before q_num_set() returns. Fixes: c8b4b477079d ("crypto: hisilicon - add HiSilicon HPRE accelerator") Signed-off-by: Xiongfeng Wang Reviewed-by: Weili Qian Signed-off-by: Herbert Xu Signed-off-by: JangShui --- include/linux/hisi_acc_qm.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/include/linux/hisi_acc_qm.h b/include/linux/hisi_acc_qm.h index 4ea4c233d9f4..a149b75f2af8 100644 --- a/include/linux/hisi_acc_qm.h +++ b/include/linux/hisi_acc_qm.h @@ -385,14 +385,14 @@ struct hisi_qp { static inline int q_num_set(const char *val, const struct kernel_param *kp, unsigned int device) { - struct pci_dev *pdev = pci_get_device(PCI_VENDOR_ID_HUAWEI, - device, NULL); + struct pci_dev *pdev; u32 n, q_num; int ret; if (!val) return -EINVAL; + pdev = pci_get_device(PCI_VENDOR_ID_HUAWEI, device, NULL); if (!pdev) { q_num = min_t(u32, QM_QNUM_V1, QM_QNUM_V2); pr_info("No device found currently, suppose queue number is %u\n", @@ -402,6 +402,8 @@ static inline int q_num_set(const char *val, const struct kernel_param *kp, q_num = QM_QNUM_V1; else q_num = QM_QNUM_V2; + + pci_dev_put(pdev); } ret = kstrtou32(val, 10, &n); -- GitLab