From 27600805e62f800bacf990354632eae4e487d34c Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Thu, 3 Sep 2026 10:43:25 -0500 Subject: x86/amd_node: Fix PCI device reference counting in amd_smn_init() The local "root" pointer is a temporary variable used during the device search. Therefore, refcount related to the search iterators should be cleaned up after the search is complete. Use the __free() cleanup macro to ensure the refcount is decremented when the temporary pointer goes out of scope. Additionally, increment the refcount when caching a root pointer. This ensures the in-use refcount is separate from the temporary search refcounting. Finally, drop the redundant "root = NULL" before the second search loop. The pci_get_class() iterator always decrements the refcount of its "from" argument, so the first loop can only fall through with "root" already NULL. Fixes: 0a4b61d9c2e4 ("x86/amd_node: Fix AMD root device caching") Closes: https://sashiko.dev/#/patchset/20260806160159.230453-1-jason.andryuk%40amd.com Reported-by: Sashiko Assisted-by: LLM Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Mario Limonciello (AMD) Cc: Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com --- lib/vdso/Kconfig | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 lib/vdso/Kconfig (limited to 'lib/vdso/Kconfig') diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig new file mode 100644 index 000000000..597f5f0f9 --- /dev/null +++ b/lib/vdso/Kconfig @@ -0,0 +1,25 @@ +# SPDX-License-Identifier: GPL-2.0 + +config VDSO_DATASTORE + bool + +config GENERIC_GETTIMEOFDAY + bool + select VDSO_DATASTORE + help + This is a generic implementation of gettimeofday vdso. + Each architecture that enables this feature has to + provide the fallback implementation. + +config GENERIC_VDSO_OVERFLOW_PROTECT + bool + help + Select to add multiplication overflow protection to the VDSO + time getter functions for the price of an extra conditional + in the hotpath. + +config VDSO_GETRANDOM + bool + select VDSO_DATASTORE + help + Selected by architectures that support vDSO getrandom(). -- cgit v1.3.1