Inappropriate file open mode used for /dev/null in fuzzing driver

[MarkLee131]

Describe the bug

In the fuzzing driver code (shown below), the file /dev/null is opened in "r" (read) mode which is typically used for reading input. However, the common practice when directing output to /dev/null, especially in testing or logging scenarios, is to open it in "w" (write) mode. This issue can potentially lead to misunderstandings or misuse of file handling in the driver.

libcbor/oss-fuzz/cbor_load_fuzzer.cc

Line 64 in a0582ab

State() : fout(fopen("/dev/null", "r")) {

Expected behavior

If my understanding is correct, this line should be modified to open /dev/null in "w" mode to adhere to its intended use as an output discard mechanism.

Looking forward to your kind reply or explanation. Thanks in advance. :)

[PJK]

Thanks for the bug report, sending #331, just need to fix CI first