ubifs query

[pavi1729]

Hi,
  I was looking at 'ubifs_lookup_level0' which is calling 'tnc_prev' function.

LINK: http://lxr.free-electrons.com/source/fs/ubifs/tnc.c?v=3.10#L1267


FUNCTION: tnc_prev
'tnc_prev' could return a negative 'n' if znode->iip is 0.

LINK: http://lxr.free-electrons.com/source/fs/ubifs/tnc.c?v=3.10#L670

nn = znode->iip - 1;


If n is negative then below code will do a negative indexing since
this is the next line

if (keys_cmp(c, key, &znode->zbranch[*n].key)) {

LINK: http://lxr.free-electrons.com/source/fs/ubifs/tnc.c?v=3.10#L1275


Is this a possibility ?

Cheers,
Pavi