From: Julia Lawall <julia.law...@lip6.fr> 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/) // <smpl> @@ expression e1,e2,e3; statement S1,S2; @@ e1 = find_first_zero_bit(e2,e3) ... if (e1 - == + >= e3) S1 else S2 // </smpl> Signed-off-by: Julia Lawall <julia.law...@lip6.fr> --- drivers/staging/tidspbridge/rmgr/node.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff -u -p a/drivers/staging/tidspbridge/rmgr/node.c b/drivers/staging/tidspbridge/rmgr/node.c --- a/drivers/staging/tidspbridge/rmgr/node.c +++ b/drivers/staging/tidspbridge/rmgr/node.c @@ -935,7 +935,7 @@ int node_connect(struct node_object *nod 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 *nod status = -EINVAL; goto out_unlock; } - if (chnl_id == CHNL_MAXCHANNELS) { + if (chnl_id >= CHNL_MAXCHANNELS) { status = -ECONNREFUSED; goto out_unlock; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
