shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 11:26:02 +09:00
Code Issues Packages Projects Releases Wiki Activity

ARM: OMAP1: ams-delta: Fix possible use of uninitialized field

Browse Source 
[ Upstream commit cec83ff124 ]

While playing with initialization order of modem device, it has been
discovered that under some circumstances (early console init, I
believe) its .pm() callback may be called before the
uart_port->private_data pointer is initialized from
plat_serial8250_port->private_data, resulting in NULL pointer
dereference.  Fix it by checking for uninitialized pointer before using
it in modem_pm().

Fixes: aabf31737a ("ARM: OMAP1: ams-delta: update the modem to use regulator API")
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Janusz Krzysztofik
2018-11-07 22:30:31 +01:00
committed by Greg Kroah-Hartman
parent 2e6ef7e360
commit e0242093e5
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm/mach-omap1/board-ams-delta.c
View File

@@ -511,6 +511,9 @@ static void modem_pm(struct uart_port *port, unsigned int state, unsigned old)
{
struct modem_private_data *priv = port->private_data;
if (!priv)
return;
if (IS_ERR(priv->regulator))
return;