scsi: lpfc: Check kzalloc() in lpfc_sli4_cgn_params_read()

[ Upstream commit 312320b0e0ec21249a17645683fe5304d796aec1 ]

If kzalloc() fails in lpfc_sli4_cgn_params_read(), then we rely on
lpfc_read_object()'s routine to NULL check pdata.

Currently, an early return error is thrown from lpfc_read_object() to
protect us from NULL ptr dereference, but the errno code is -ENODEV.

Change the errno code to a more appropriate -ENOMEM.

Reported-by: Kang Chen <void0red@gmail.com>
Link: https://lore.kernel.org/all/20230226102338.3362585-1-void0red@gmail.com
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20230228044336.5195-1-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 855817f6fe6710958ede2a94b4f53a54621dbfb8..f79299f6178cd66dfd45d717dd3b630eb8c7d12e 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -7056,6 +7056,8 @@ lpfc_sli4_cgn_params_read(struct lpfc_hba *phba)
        /* Find out if the FW has a new set of congestion parameters. */
        len = sizeof(struct lpfc_cgn_param);
        pdata = kzalloc(len, GFP_KERNEL);
+       if (!pdata)
+               return -ENOMEM;
        ret = lpfc_read_object(phba, (char *)LPFC_PORT_CFG_NAME,
                               pdata, len);
 

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 7d333167047f5047829272e2995c540690a26ce8..1f1d346adc038798f171bbe2b3de3fcb1a3a3ba1 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -22376,10 +22376,6 @@ lpfc_read_object(struct lpfc_hba *phba, char *rdobject, uint32_t *datap,
        struct lpfc_dmabuf *pcmd;
        u32 rd_object_name[LPFC_MBX_OBJECT_NAME_LEN_DW] = {0};
 
-       /* sanity check on queue memory */
-       if (!datap)
-               return -ENODEV;
-
        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;