From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- net/9p/trans_common.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 net/9p/trans_common.c (limited to 'net/9p/trans_common.c') diff --git a/net/9p/trans_common.c b/net/9p/trans_common.c new file mode 100644 index 000000000..c827f6945 --- /dev/null +++ b/net/9p/trans_common.c @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: LGPL-2.1 +/* + * Copyright IBM Corporation, 2010 + * Author Venkateswararao Jujjuri + */ + +#include +#include +#include "trans_common.h" + +/** + * p9_release_pages - Release pages after the transaction. + * @pages: array of pages to be put + * @nr_pages: size of array + */ +void p9_release_pages(struct page **pages, int nr_pages) +{ + int i; + + for (i = 0; i < nr_pages; i++) + if (pages[i]) + put_page(pages[i]); +} +EXPORT_SYMBOL(p9_release_pages); -- cgit v1.3.1