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| author | Azeem Shaikh <azeemshaikh38@gmail.com> | 2023-06-14 01:03:54 +0000 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2023-06-14 12:27:38 -0700 |
| commit | 33457938a0c4e817ab6f9923e244b91289f47f54 (patch) | |
| tree | 69141c2bb53aff72f2bb0475bd7fc01f566cfa9c /kernel/params.c | |
| parent | 870410910b6ad032afb6a02bfd6a8c65dde6084b (diff) | |
| download | linux-33457938a0c4e817ab6f9923e244b91289f47f54.tar.gz linux-33457938a0c4e817ab6f9923e244b91289f47f54.tar.bz2 linux-33457938a0c4e817ab6f9923e244b91289f47f54.zip | |
kallsyms: Replace all non-returning strlcpy with strscpy
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
Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230614010354.1026096-1-azeemshaikh38@gmail.com
Diffstat (limited to 'kernel/params.c')
| -rw-r--r-- | kernel/params.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/params.c b/kernel/params.c index 6a7548979aa9..07d01f6ce9a2 100644 --- a/kernel/params.c +++ b/kernel/params.c @@ -847,7 +847,7 @@ static void __init param_sysfs_builtin(void) name_len = 0; } else { name_len = dot - kp->name + 1; - strlcpy(modname, kp->name, name_len); + strscpy(modname, kp->name, name_len); } kernel_add_sysfs_param(modname, kp, name_len); } |