linux-kernel - [patch] gfs2: make some sizes unsigned in set_recover

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Message-ID: <20120104071931.GC30978@elgon.mountain>
Date:	Wed, 4 Jan 2012 10:19:31 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Steven Whitehouse <swhiteho@...hat.com>,
	David Teigland <teigland@...hat.com>
Cc:	cluster-devel@...hat.com, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] gfs2: make some sizes unsigned in set_recover_size()

ls->ls_recover_size is uint32_t so old_size and new_size should be
unsigned as well.  Otherwise a large value could count as a negative
and we could get past the "if (old_size >= max_jid + 1)" check by
mistake.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c
index 82c82d0..400d041 100644
--- a/fs/gfs2/lock_dlm.c
+++ b/fs/gfs2/lock_dlm.c
@@ -886,7 +886,8 @@ static int set_recover_size(struct gfs2_sbd *sdp, struct dlm_slot *slots,
 	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 	uint32_t *submit = NULL;
 	uint32_t *result = NULL;
-	int i, max_jid, old_size, new_size;
+	uint32_t old_size, new_size;
+	int i, max_jid;
 
 	max_jid = 0;
 	for (i = 0; i < num_slots; i++) {
--
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