From mboxrd@z Thu Jan 1 00:00:00 1970 From: Colin King Date: Wed, 24 Jun 2020 16:39:57 +0000 Subject: [PATCH] staging: most: avoid null pointer dereference when iface is null Message-Id: <20200624163957.11676-1-colin.king@canonical.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Greg Kroah-Hartman , Christian Gromm Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org From: Colin Ian King In the case where the pointer iface is null then the reporting of this error will dereference iface when printing an error message causing which is not ideal. Since the majority of callers to most_register_interface report an error when -EINVAL is returned a simple fix is to just remove the error message, I doubt it will be missed. Addresses-Coverity: ("Dereference after null check") Fixes: 57562a72414c ("Staging: most: add MOST driver's core module") Signed-off-by: Colin Ian King --- drivers/most/core.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/most/core.c b/drivers/most/core.c index f781c46cd4af..353ab277cbc6 100644 --- a/drivers/most/core.c +++ b/drivers/most/core.c @@ -1283,10 +1283,8 @@ int most_register_interface(struct most_interface *iface) struct most_channel *c; if (!iface || !iface->enqueue || !iface->configure || - !iface->poison_channel || (iface->num_channels > MAX_CHANNELS)) { - dev_err(iface->dev, "Bad interface or channel overflow\n"); + !iface->poison_channel || (iface->num_channels > MAX_CHANNELS)) return -EINVAL; - } id = ida_simple_get(&mdev_id, 0, 0, GFP_KERNEL); if (id < 0) { -- 2.27.0