ubifs query

pavi1729 pavitra1729 at gmail.com
Mon Jan 11 07:07:22 PST 2016


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



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