staging: vc04_services: handle kzalloc failure

The kzalloc here was being used without checking the return - if the
kzalloc fails return VCHIQ_ERROR. The call-site of
vchiq_platform_init_state() vchiq_init_state() was not responding
to an allocation failure so checks for != VCHIQ_SUCCESS
and pass VCHIQ_ERROR up to vchiq_platform_init() which then
will fail with -EINVAL.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Reported-by: kbuild test robot <lkp@intel.com>
Acked-By: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
index 31eb7d5..a9a2291 100644 (file)
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
@@ -179,6 +179,9 @@ vchiq_platform_init_state(struct vchiq_state *state)
        struct vchiq_2835_state *platform_state;
 
        state->platform_state = kzalloc(sizeof(*platform_state), GFP_KERNEL);
+       if (!state->platform_state)
+               return VCHIQ_ERROR;
+
        platform_state = (struct vchiq_2835_state *)state->platform_state;
 
        platform_state->inited = 1;

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
index 6057a90..0c387b6 100644 (file)
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
@@ -2209,6 +2209,8 @@ vchiq_init_state(struct vchiq_state *state, struct vchiq_slot_zero *slot_zero)
        local->debug[DEBUG_ENTRIES] = DEBUG_MAX;
 
        status = vchiq_platform_init_state(state);
+       if (status != VCHIQ_SUCCESS)
+               return VCHIQ_ERROR;
 
        /*
                bring up slot handler thread