From cc0be81f00472d782804293766ddd9d1c2b4ebd1 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Wed, 4 Jun 2014 11:07:54 +0200 Subject: [PATCH] staging: tidspbridge: use safer test on the result of find_first_zero_bit Find_first_zero_bit considers BITS_PER_LONG bits at a time, and thus may return a larger number than the maximum position argument if that position is not a multiple of BITS_PER_LONG. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @@ expression e1,e2,e3; statement S1,S2; @@ e1 = find_first_zero_bit(e2,e3) ... if (e1 - == + >= e3) S1 else S2 // Signed-off-by: Julia Lawall Signed-off-by: Greg Kroah-Hartman --- drivers/staging/tidspbridge/rmgr/node.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/tidspbridge/rmgr/node.c b/drivers/staging/tidspbridge/rmgr/node.c index 9d3044a384ee..305f3a60db71 100644 --- a/drivers/staging/tidspbridge/rmgr/node.c +++ b/drivers/staging/tidspbridge/rmgr/node.c @@ -935,7 +935,7 @@ int node_connect(struct node_object *node1, u32 stream1, node2_type == NODE_DAISSOCKET)) { /* Find available pipe */ pipe_id = find_first_zero_bit(hnode_mgr->pipe_map, MAXPIPES); - if (pipe_id == MAXPIPES) { + if (pipe_id >= MAXPIPES) { status = -ECONNREFUSED; goto out_unlock; } @@ -1008,7 +1008,7 @@ int node_connect(struct node_object *node1, u32 stream1, status = -EINVAL; goto out_unlock; } - if (chnl_id == CHNL_MAXCHANNELS) { + if (chnl_id >= CHNL_MAXCHANNELS) { status = -ECONNREFUSED; goto out_unlock; } -- 2.39.5