On Thu, 1 Apr 2010 12:45:46 +0300
Aaro Koskinen <aaro.koskinen@xxxxxx> wrote:
Garbage in the initrd memory area may result in the unpack routine
accessing memory outside the buffer. The patch adds a check that the
specified area size is not exceeded.
Signed-off-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
Cc: stable <stable@xxxxxxxxxx>
The patch prevents the following kernel panic on Amstrad E3:
Unable to handle kernel paging request at virtual address c20121a7
@@ -460,6 +460,8 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len)
if (state != Reset)
error("junk in compressed archive");
+ if (my_inptr >= len)
this_header = saved_offset + my_inptr;
buf += my_inptr;
len -= my_inptr;
OK, so if I'm understanding this right, the call to
decompress(buf, len, NULL, flush_buffer, NULL, &my_inptr, error);
has gone and generated more output data than it was asked to generate?
If so, isn't that a bug in the decompressor? Which one is your system using?