The patch titled
Subject: procfs: replace all non-returning strlcpy with strscpy
has been added to the -mm mm-nonmm-unstable branch. Its filename is
procfs-replace-all-non-returning-strlcpy-with-strscpy.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/procfs-replace-all-non-returning-strlcpy-with-strscpy.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Azeem Shaikh <azeemshaikh38@xxxxxxxxx>
Subject: procfs: replace all non-returning strlcpy with strscpy
Date: Wed, 10 May 2023 21:24:57 +0000
strlcpy() reads the entire source buffer first. This read may exceed the
destination size limit. This is both inefficient and can lead to linear
read overflows if a source string is not NUL-terminated [1]. In an effort
to remove strlcpy() completely [2], replace strlcpy() here with strscpy().
No return values were used, so direct replacement is safe.
[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89
Link: https://lkml.kernel.org/r/20230510212457.3491385-1-azeemshaikh38@xxxxxxxxx
Signed-off-by: Azeem Shaikh <azeemshaikh38@xxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: Liu Shixin <liushixin2@xxxxxxxxxx>
Cc: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/kcore.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/proc/kcore.c~procfs-replace-all-non-returning-strlcpy-with-strscpy
+++ a/fs/proc/kcore.c
@@ -419,7 +419,7 @@ static ssize_t read_kcore_iter(struct ki
char *notes;
size_t i = 0;
- strlcpy(prpsinfo.pr_psargs, saved_command_line,
+ strscpy(prpsinfo.pr_psargs, saved_command_line,
sizeof(prpsinfo.pr_psargs));
notes = kzalloc(notes_len, GFP_KERNEL);
_
Patches currently in -mm which might be from azeemshaikh38@xxxxxxxxx are
procfs-replace-all-non-returning-strlcpy-with-strscpy.patch
