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scsi: libfcoe: 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>
Link: https://lore.kernel.org/r/20230530155818.368562-1-azeemshaikh38@gmail.com
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Azeem Shaikh 2023-05-30 15:58:18 +00:00 • committed by Martin K. Petersen
parent 73be26b12d
commit 4dae0262fb
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/fcoe/fcoe_transport.c
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@ -711,7 +711,7 @@ static struct net_device *fcoe_if_to_netdev(const char *buffer)
char ifname[IFNAMSIZ + 2];
if (buffer) {
strlcpy(ifname, buffer, IFNAMSIZ);
strscpy(ifname, buffer, IFNAMSIZ);
cp = ifname + strlen(ifname);
while (--cp >= ifname && *cp == '\n')
*cp = '\0';