From b226c74737090f5fca17656f43743b2c6ab766ca Mon Sep 17 00:00:00 2001 From: Zelalem Date: Fri, 18 Dec 2020 11:02:25 -0600 Subject: DebugFS: Check channel index before calling clone function To avoid a potential out-of-bounds access, check whether a device exists on a channel before calling the corresponding clone function. Signed-off-by: Zelalem Change-Id: Ia0dd66b331d3fa8a33109a02369e1bc9ae0fdd5b --- lib/debugfs/dev.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'lib/debugfs/dev.c') diff --git a/lib/debugfs/dev.c b/lib/debugfs/dev.c index 0361437b8..2fc1d4062 100644 --- a/lib/debugfs/dev.c +++ b/lib/debugfs/dev.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2019, Arm Limited. All rights reserved. + * Copyright (c) 2019-2021, Arm Limited. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ @@ -333,6 +333,10 @@ noent: ******************************************************************************/ chan_t *clone(chan_t *c, chan_t *nc) { + if (c->index == NODEV) { + return NULL; + } + return devtab[c->index]->clone(c, nc); } -- cgit v1.2.3