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KEYS: 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: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
This commit is contained in:
Azeem Shaikh 2023-05-18 04:15:13 +00:00 committed by Jarkko Sakkinen
parent 44e69ea538
commit 604b8e7558
1 changed files with 1 additions and 1 deletions
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2
security/keys/request_key_auth.c
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@ -178,7 +178,7 @@ struct key *request_key_auth_new(struct key *target, const char *op,
if (!rka->callout_info)
goto error_free_rka;
rka->callout_len = callout_len;
strlcpy(rka->op, op, sizeof(rka->op));
strscpy(rka->op, op, sizeof(rka->op));
/* see if the calling process is already servicing the key request of
* another process */