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| author | Azeem Shaikh <azeemshaikh38@gmail.com> | 2023-05-30 15:56:08 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-06-01 09:13:31 -0600 |
| commit | 20d099756b98fa6b5b838448b1ffbce46f4f3283 (patch) | |
| tree | 7395fa0c837d62973e862518c40d326844533da6 /block/genhd.c | |
| parent | 5a0ac57c48aa9380126bd9bf3ec82140aab84548 (diff) | |
| download | lwn-20d099756b98fa6b5b838448b1ffbce46f4f3283.tar.gz lwn-20d099756b98fa6b5b838448b1ffbce46f4f3283.zip | |
block: 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>
Link: https://lore.kernel.org/r/20230530155608.272266-1-azeemshaikh38@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/genhd.c')
| -rw-r--r-- | block/genhd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/genhd.c b/block/genhd.c index 1cb489b927d5..3537b7d7c484 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -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); |