Richard Yao d31a7cb4fa Address theoretical uninitialized variable usage in zstream ... Coverity has long complained about the checksum being uninitialized if an END record is processed before its BEGIN record. This should not happen, but there was no code to check for it. I had left this unfixed since it was a low priority issue, but then 9f4ede63d2 added another instance of this. I am making an effort to "hold the line" to keep new coverity defect reports from going unaddressed, so I find myself forced to fix this much earlier than I had originally planned to address it. The solution is to maintain a counter and a flag. Then use VERIFY statements to verify the following runtime constraints: * Every record either has a corresponding BEGIN record, is a BEGIN record or is the end of stream END record for replication streams. * BEGIN records cannot be nested. i.e. There must be an END record before another BEGIN record may be seen. Failure to meet these constraints will cause the program to exit. This is sufficient to ensure that the checksum is never accessed when uninitialized. Reported-by: Coverity (CID 1524578) Reported-by: Coverity (CID 1524633) Reported-by: Coverity (CID 1527295) Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Damian Szuberski <szuberskidamian@gmail.com> Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Closes #14176		2022-12-12 10:40:05 -08:00
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Makefile.am	Add ability to recompress send streams with new compression algorithm	2022-11-10 15:23:46 -08:00
zstream.c	Add ability to recompress send streams with new compression algorithm	2022-11-10 15:23:46 -08:00
zstream.h	Add ability to recompress send streams with new compression algorithm	2022-11-10 15:23:46 -08:00
zstream_decompress.c	Address theoretical uninitialized variable usage in zstream	2022-12-12 10:40:05 -08:00
zstream_dump.c	Fix declarations of non-global variables	2022-10-18 11:05:32 -07:00
zstream_recompress.c	Address theoretical uninitialized variable usage in zstream	2022-12-12 10:40:05 -08:00
zstream_redup.c	Address theoretical uninitialized variable usage in zstream	2022-12-12 10:40:05 -08:00
zstream_token.c	Fix userland dereference NULL return value bugs	2022-09-30 17:02:57 -07:00