Negative value used as argument to a function expecting a positive value (for example, size of buffer or allocation)

Defect 10465 (STATIC_C)
Checker NEGATIVE_RETURNS (subcategory critical_argument)
File: /src/mongo/util/logfile.cpp
Function mongo::LogFile::synchronousAppend(const void *, unsigned long)
/src/mongo/util/logfile.cpp, line: 244
Function "lseek(this->_fd, 0L, 1)" returns a negative number.
/src/mongo/util/logfile.cpp, line: 244
Assigning: signed variable "pos" = "lseek".
/src/mongo/util/logfile.cpp, line: 272
"pos" is passed to a parameter that cannot be negative.