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| author | Jesper Juhl <jesper.juhl@gmail.com> | 2007-07-28 03:13:33 +0400 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.localdomain> | 2007-07-28 18:58:28 +0400 |
| commit | 92631fa4d0afa64b82144eab714fbf2f4049dabe (patch) | |
| tree | 9d885b3d23c72241dff4b5bbaf2dca88b4c05ea3 /drivers/scsi/libsas/sas_expander.c | |
| parent | 99d4d0a9f251a87e0710c6f1fb46ac0d4bce12cb (diff) | |
| download | linux-92631fa4d0afa64b82144eab714fbf2f4049dabe.tar.xz | |
[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/scsi/libsas/sas_expander.c')
| -rw-r--r-- | drivers/scsi/libsas/sas_expander.c | 13 |
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; |