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block: Replace all non-returning strlcpy with strscpy

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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>
Link: https://lore.kernel.org/r/20230530155608.272266-1-azeemshaikh38@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Azeem Shaikh
2023-05-30 15:56:08 +00:00
committed by Jens Axboe
parent 5a0ac57c48
commit 20d099756b
3 changed files with 3 additions and 3 deletions
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2
block/genhd.c
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@@ -253,7 +253,7 @@ int __register_blkdev(unsigned int major, const char *name,
#ifdef CONFIG_BLOCK_LEGACY_AUTOLOAD
p->probe = probe;
#endif
strlcpy(p->name, name, sizeof(p->name));
strscpy(p->name, name, sizeof(p->name));
p->next = NULL;
index = major_to_index(major);