no limitation for "%s" while calling fscanf()

[QiAnXinCodeSafe]

fboss/fboss/util/nic_util.cpp

Line 494 in 8865126

fscanf(fp, "%s", &sysfsPath[nChars]);

[iris577]

@bdd

[slogan621]

Not only that, but sprintf on the line before would be more secure as snprintf, and strcat on the line after would be more secure as strncat.