lz4: add overrun checks to lz4_uncompress_unknownoutputsize()

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commit 4a3a990451 upstream.

Jan points out that I forgot to make the needed fixes to the
lz4_uncompress_unknownoutputsize() function to mirror the changes done
in lz4_decompress() with regards to potential pointer overflows.

The only in-kernel user of this function is the zram code, which only
takes data from a valid compressed buffer that it made itself, so it's
not a big issue.  But due to external kernel modules using this
function, it's better to be safe here.

Reported-by: Jan Beulich <JBeulich@suse.com>
Cc: "Don A. Bailey" <donb@securitymouse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Greg Kroah-Hartman 2014-07-03 16:06:57 -07:00

parent ac79fd540a

commit bbd637d4b8

1 changed files with 5 additions and 1 deletions

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lib/lz4/lz4_decompress.c

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