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caif: add error handling for allocation

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The allocation of "phyinfo" wasn't checked, and also the allocation
wasn't freed on error paths.  Sjur Brændeland pointed out as well
that "phy_driver" should be freed on the error path too.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2011-09-20 21:21:59 +00:00 committed by David S. Miller
parent 64af1bac9b
commit 5bb20ed863
1 changed files with 14 additions and 9 deletions
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23
net/caif/cfcnfg.c
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@ -467,7 +467,7 @@ cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type,
{
struct cflayer *frml;
struct cflayer *phy_driver = NULL;
struct cfcnfg_phyinfo *phyinfo;
struct cfcnfg_phyinfo *phyinfo = NULL;
int i;
u8 phyid;
@ -482,23 +482,25 @@ cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type,
goto got_phyid;
}
pr_warn("Too many CAIF Link Layers (max 6)\n");
goto out;
goto out_err;
got_phyid:
phyinfo = kzalloc(sizeof(struct cfcnfg_phyinfo), GFP_ATOMIC);
if (!phyinfo)
goto out_err;
switch (phy_type) {
case CFPHYTYPE_FRAG:
phy_driver =
cfserl_create(CFPHYTYPE_FRAG, phyid, stx);
if (!phy_driver)
goto out;
goto out_err;
break;
case CFPHYTYPE_CAIF:
phy_driver = NULL;
break;
default:
goto out;
goto out_err;
}
phy_layer->id = phyid;
phyinfo->pref = pref;
@ -512,10 +514,8 @@ got_phyid:
frml = cffrml_create(phyid, fcs);
if (!frml) {
kfree(phyinfo);
goto out;
}
if (!frml)
goto out_err;
phyinfo->frm_layer = frml;
layer_set_up(frml, cnfg->mux);
@ -531,7 +531,12 @@ got_phyid:
}
list_add_rcu(&phyinfo->node, &cnfg->phys);
out:
mutex_unlock(&cnfg->lock);
return;
out_err:
kfree(phy_driver);
kfree(phyinfo);
mutex_unlock(&cnfg->lock);
}
EXPORT_SYMBOL(cfcnfg_add_phy_layer);