From e07a097b4986afb8f925d0bb32612e1d3e88ce15 Mon Sep 17 00:00:00 2001 From: Zhou Qingyang Date: Wed, 1 Dec 2021 00:50:39 +0800 Subject: octeontx2-af: Fix a memleak bug in rvu_mbox_init() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In rvu_mbox_init(), mbox_regions is not freed or passed out under the switch-default region, which could lead to a memory leak. Fix this bug by changing 'return err' to 'goto free_regions'. This bug was found by a static analyzer. The analysis employs differential checking to identify inconsistent security operations (e.g., checks or kfrees) between two code paths and confirms that the inconsistent operations are not recovered in the current function or the callers, so they constitute bugs. Note that, as a bug found by static analysis, it can be a false positive or hard to trigger. Multiple researchers have cross-reviewed the bug. Builds with CONFIG_OCTEONTX2_AF=y show no new warnings, and our static analyzer no longer warns about this code. Fixes: 98c561116360 (“octeontx2-af: cn10k: Add mbox support for CN10K platform”) Signed-off-by: Zhou Qingyang Link: https://lore.kernel.org/r/20211130165039.192426-1-zhou1615@umn.edu Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/marvell/octeontx2/af/rvu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c index cb56e171ddd4..3ca6b942ebe2 100644 --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c @@ -2341,7 +2341,7 @@ static int rvu_mbox_init(struct rvu *rvu, struct mbox_wq_info *mw, goto free_regions; break; default: - return err; + goto free_regions; } mw->mbox_wq = alloc_workqueue(name, -- cgit v1.2.3