6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Joe Hattori joe@pf.is.s.u-tokyo.ac.jp
[ Upstream commit 185e1b1d91e419445d3fd99c1c0376a970438acf ]
mlxplat_pci_fpga_device_init() calls pci_get_device() but does not release the refcount on error path. Call pci_dev_put() on the error path and in mlxplat_pci_fpga_device_exit() to fix this.
This bug was found by an experimental static analysis tool that I am developing.
Fixes: 02daa222fbdd ("platform: mellanox: Add initial support for PCIe based programming logic device") Signed-off-by: Joe Hattori joe@pf.is.s.u-tokyo.ac.jp Reviewed-by: Vadim Pasternak vadimp@nvidia.com Link: https://lore.kernel.org/r/20241216022538.381209-1-joe@pf.is.s.u-tokyo.ac.jp Reviewed-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/x86/mlx-platform.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c index 9d70146fd742..1a09f2dfb7bc 100644 --- a/drivers/platform/x86/mlx-platform.c +++ b/drivers/platform/x86/mlx-platform.c @@ -6237,6 +6237,7 @@ mlxplat_pci_fpga_device_init(unsigned int device, const char *res_name, struct p fail_pci_request_regions: pci_disable_device(pci_dev); fail_pci_enable_device: + pci_dev_put(pci_dev); return err; }
@@ -6247,6 +6248,7 @@ mlxplat_pci_fpga_device_exit(struct pci_dev *pci_bridge, iounmap(pci_bridge_addr); pci_release_regions(pci_bridge); pci_disable_device(pci_bridge); + pci_dev_put(pci_bridge); }
static int