The patch titled
Subject: mm/thp: fix strncpy warning
has been added to the -mm tree. Its filename is
mm-thp-fix-strncpy-warning.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-thp-fix-strncpy-warning.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-thp-fix-strncpy-warning.patch
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The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm/thp: fix strncpy warning
Using MAX_INPUT_BUF_SZ as the maximum length of the string makes fortify
complain as it thinks the string might be longer than the buffer, and if
it is, we will end up with a "string" that is missing a NUL terminator.
It's trivial to show that 'tok' points to a NUL-terminated string which is
less than MAX_INPUT_BUF_SZ in length, so we may as well just use strcpy()
and avoid the warning.
Link: https://lkml.kernel.org/r/20210615200242.1716568-4-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/huge_memory.c~mm-thp-fix-strncpy-warning
+++ a/mm/huge_memory.c
@@ -3101,7 +3101,7 @@ static ssize_t split_huge_pages_write(st
tok = strsep(&buf, ",");
if (tok) {
- strncpy(file_path, tok, MAX_INPUT_BUF_SZ);
+ strcpy(file_path, tok);
} else {
ret = -EINVAL;
goto out;
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-mark-idle-page-tracking-as-broken.patch
writeback-cgroup-release-dying-cgwbs-by-switching-attached-inodes-fix-3.patch
mm-make-__dump_page-static.patch
mm-debug-factor-pagepoisoned-out-of-__dump_page.patch
mm-page_owner-constify-dump_page_owner.patch
mm-make-compound_head-const-preserving.patch
mm-constify-get_pfnblock_flags_mask-and-get_pfnblock_migratetype.patch
mm-constify-page_count-and-page_ref_count.patch
mm-optimise-nth_page-for-contiguous-memmap.patch
mm-thp-fix-strncpy-warning.patch
