print error when reading with unsupported compression
    
    Resolves: bz2069200
    Upstream: github.com/makedumpfile/makedumpfile.git
    Conflicts: goto out_error --> return FALSE
    	   due to missing 64b5b29 ("[PATCH 03/15] remove variable length
    	   array in readpage_kdump_compressed()")
    
    commit 5035c0821f07da3badda645cd0064d4b80e1667d
    Author: Philipp Rudo <prudo@redhat.com>
    Date:   Mon Mar 14 17:04:32 2022 +0100
    
        [PATCH] print error when reading with unsupported compression
    
        Currently makedumpfile only checks if the required compression algorithm
        was enabled during build when compressing a dump but not when reading
        from one. This can lead to situations where, one version of makedumpfile
        creates the dump using a compression algorithm an other version of
        makedumpfile doesn't support. When the second version now tries to, e.g.
        extract the dmesg from the dump it will fail with an error similar to
    
          # makedumpfile --dump-dmesg vmcore dmesg.txt
          __vtop4_x86_64: Can't get a valid pgd.
          readmem: Can't convert a virtual address(ffffffff92e18284) to physical address.
          readmem: type_addr: 0, addr:ffffffff92e18284, size:390
          check_release: Can't get the address of system_utsname.
    
          makedumpfile Failed.
    
        That's because readpage_kdump_compressed{_parallel} does not return
        with an error if the page it is trying to read is compressed with an
        unsupported compression algorithm. Thus readmem copies random data from
        the (uninitialized) cachebuf to its caller and thus causing the error
        above.
    
        Fix this by checking if the required compression algorithm is supported
        in readpage_kdump_compressed{_parallel} and print a proper error message
        if it isn't.
    
        Reported-by: Dave Wysochanski <dwysocha@redhat.com>
        Signed-off-by: Philipp Rudo <prudo@redhat.com>
        Reviewed-and-tested-by: Dave Wysochanski <dwysocha@redhat.com>
        Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
    
    Signed-off-by: Philipp Rudo <prudo@redhat.com>