From: Dan Carpenter <dan.carpenter@oracle.com>
To: Sjur Braendeland <sjur.brandeland@stericsson.com>
Cc: "David S. Miller" <davem@davemloft.net>,
netdev@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch v2] caif: add error handling for allocation
Date: Wed, 21 Sep 2011 10:21:59 +0300 [thread overview]
Message-ID: <20110921072159.GJ4999@elgon.mountain> (raw)
In-Reply-To: <CAJK669Yb6V=xr9ZvQGOKGEvmzO1JGhrHD+sR69b04EQxUjOOrQ@mail.gmail.com>
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>
---
V2: Add a kfree(phy_driver).
diff --git a/net/caif/cfcnfg.c b/net/caif/cfcnfg.c
index f07ab8c..00523ec 100644
--- a/net/caif/cfcnfg.c
+++ b/net/caif/cfcnfg.c
@@ -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);
next prev parent reply other threads:[~2011-09-21 7:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-02 8:07 [patch -next] caif: add error handling for allocation Dan Carpenter
2011-09-02 9:40 ` Sjur Brændeland
2011-09-02 12:19 ` [PATCH] caif: fix a potential NULL dereference Eric Dumazet
2011-09-02 13:13 ` Sjur Brændeland
2011-09-16 22:56 ` David Miller
2011-09-02 15:51 ` [patch -next] caif: add error handling for allocation Dan Carpenter
2011-09-21 7:21 ` Dan Carpenter [this message]
2011-09-23 10:38 ` [patch v2] " Sjur BRENDELAND
2011-10-03 17:46 ` David Miller
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