diff options
| author | Eduard Zingerman <eddyz87@gmail.com> | 2026-09-04 17:05:56 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 18:17:30 -0700 |
| commit | 506ada89629ec7059b96ecfb0dc7d33ece0103ca (patch) | |
| tree | 0b07297409b68d2333fb4f0eae7f3b072eb68d4c /net/9p/trans_common.c | |
| download | linux-stable-506ada89629ec7059b96ecfb0dc7d33ece0103ca.tar.gz linux-stable-506ada89629ec7059b96ecfb0dc7d33ece0103ca.zip | |
bpf: mark a NULL kfunc argument precisegrafted
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 <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'net/9p/trans_common.c')
| -rw-r--r-- | net/9p/trans_common.c | 24 |
1 files changed, 24 insertions, 0 deletions
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 <jvrao@linux.vnet.ibm.com> + */ + +#include <linux/mm.h> +#include <linux/module.h> +#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); |