[patch 27/47] textsearch: fix Boyer-Moore text search bug

[Greg KH]

2.6.25-stable review patch.  If anyone has any objections, please let us
know.

------------------
From: Joonwoo Park <joonwpark81@xxxxxxxxx>

Upstream commit aebb6a849cfe7d89bcacaaecc20a480dfc1180e7

The current logic has a bug which cannot find matching pattern, if the
pattern is matched from the first character of target string.
for example:
	pattern=abc, string=abcdefg
	pattern=a,   string=abcdefg
Searching algorithm should return 0 for those things.

Signed-off-by: Joonwoo Park <joonwpark81@xxxxxxxxx>
Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>

---
 lib/ts_bm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/ts_bm.c
+++ b/lib/ts_bm.c
@@ -63,7 +63,7 @@ static unsigned int bm_find(struct ts_co
 	struct ts_bm *bm = ts_config_priv(conf);
 	unsigned int i, text_len, consumed = state->offset;
 	const u8 *text;
-	int shift = bm->patlen, bs;
+	int shift = bm->patlen - 1, bs;
 
 	for (;;) {
 		text_len = conf->get_next_block(consumed, &text, conf, state);

-- 
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