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
Cast the integer type to (u)intptr_t before casting to "void *". In
CHERI C/C++ we warn on bare casts from integers to pointers to catch
attempts to create pointers our of thin air. We allow the warning to be
supressed with a suitable cast through (u)intptr_t.
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Signed-off-by: Brooks Davis <brooks.davis@sri.com>
Closes#14131
If a record is uncompressed on-disk but the block pointer insists
otherwise, reading it will return EIO. This commit adds an "off" type
to the "zstream decompress" command. Using it will set the compression
field in a zfs stream to "off" without changing the record's data.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Alan Somers <asomers@FreeBSD.org>
Sponsored by: Axcient
Closes#13997
It can be used to repair a ZFS file system corrupted by ZFS bug #12762.
Use it like this:
zfs send -c <DS> | \
zstream decompress <OBJECT>,<OFFSET>[,<COMPRESSION_ALGO>] ... | \
zfs recv <DST_DS>
Reviewed-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Allan Jude <allan@klarasystems.com>
Signed-off-by: Alan Somers <asomers@gmail.com>
Sponsored-by: Axcient
Workaround for #12762Closes#13256
Richard Yao
Brooks Davis
Alan Somers
Tino Reichardt
Alan Somers