From 38d22659803a033b1b66cd2624c33570c0dde77d Mon Sep 17 00:00:00 2001 From: Aditya Pakki Date: Sat, 2 Mar 2019 15:20:43 -0600 Subject: [PATCH] isdn: mISDN: Fix potential NULL pointer dereference of kzalloc Allocating memory via kzalloc for phi may fail and causes a NULL pointer dereference. This patch avoids such a scenario. Signed-off-by: Aditya Pakki Signed-off-by: David S. Miller --- drivers/isdn/hardware/mISDN/hfcsusb.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/isdn/hardware/mISDN/hfcsusb.c b/drivers/isdn/hardware/mISDN/hfcsusb.c index 124ff530da82..26e3182bbca8 100644 --- a/drivers/isdn/hardware/mISDN/hfcsusb.c +++ b/drivers/isdn/hardware/mISDN/hfcsusb.c @@ -263,6 +263,9 @@ hfcsusb_ph_info(struct hfcsusb *hw) int i; phi = kzalloc(struct_size(phi, bch, dch->dev.nrbchan), GFP_ATOMIC); + if (!phi) + return; + phi->dch.ch.protocol = hw->protocol; phi->dch.ch.Flags = dch->Flags; phi->dch.state = dch->state; -- 2.30.2