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authorJesper Juhl <jesper.juhl@gmail.com>2007-07-28 01:13:33 +0200
committerJames Bottomley <jejb@mulgrave.localdomain>2007-07-28 16:58:28 +0200
commit92631fa4d0afa64b82144eab714fbf2f4049dabe (patch)
tree9d885b3d23c72241dff4b5bbaf2dca88b4c05ea3 /drivers
parent[SCSI] bsg: Fix build for CONFIG_BLOCK=n (diff)
downloadlinux-92631fa4d0afa64b82144eab714fbf2f4049dabe.tar.xz
linux-92631fa4d0afa64b82144eab714fbf2f4049dabe.zip
[SCSI] libsas: Fix potential NULL dereference in sas_smp_get_phy_events()
In sas_smp_get_phy_events() we never test if the call to alloc_smp_req(RPEL_REQ_SIZE) succeeds or fails. That means we run the risk of dereferencing a NULL pointer if it does fail. Far better to test if we got NULL back and in that case return -ENOMEM just as we already do for the other memory allocation in that function. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/libsas/sas_expander.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 8603ae65213d..8727436b222d 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -507,14 +507,21 @@ static int sas_dev_present_in_domain(struct asd_sas_port *port,
int sas_smp_get_phy_events(struct sas_phy *phy)
{
int res;
+ u8 *req;
+ u8 *resp;
struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
struct domain_device *dev = sas_find_dev_by_rphy(rphy);
- u8 *req = alloc_smp_req(RPEL_REQ_SIZE);
- u8 *resp = kzalloc(RPEL_RESP_SIZE, GFP_KERNEL);
- if (!resp)
+ req = alloc_smp_req(RPEL_REQ_SIZE);
+ if (!req)
return -ENOMEM;
+ resp = alloc_smp_resp(RPEL_RESP_SIZE);
+ if (!resp) {
+ kfree(req);
+ return -ENOMEM;
+ }
+
req[1] = SMP_REPORT_PHY_ERR_LOG;
req[9] = phy->number;