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Subject[PATCH 4.14 09/94] scsi: csiostor: add a check for NULL pointer after kmalloc()
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Varun Prakash <varun@chelsio.com>

[ Upstream commit 89809b028b6f54187b7d81a0c69b35d394c52e62 ]

Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/scsi/csiostor/csio_hw.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)

--- a/drivers/scsi/csiostor/csio_hw.c
+++ b/drivers/scsi/csiostor/csio_hw.c
@@ -2010,8 +2010,8 @@ bye:
}

/*
- * Returns -EINVAL if attempts to flash the firmware failed
- * else returns 0,
+ * Returns -EINVAL if attempts to flash the firmware failed,
+ * -ENOMEM if memory allocation failed else returns 0,
* if flashing was not attempted because the card had the
* latest firmware ECANCELED is returned
*/
@@ -2039,6 +2039,13 @@ csio_hw_flash_fw(struct csio_hw *hw, int
return -EINVAL;
}

+ /* allocate memory to read the header of the firmware on the
+ * card
+ */
+ card_fw = kmalloc(sizeof(*card_fw), GFP_KERNEL);
+ if (!card_fw)
+ return -ENOMEM;
+
if (csio_is_t5(pci_dev->device & CSIO_HW_CHIP_MASK))
fw_bin_file = FW_FNAME_T5;
else
@@ -2052,11 +2059,6 @@ csio_hw_flash_fw(struct csio_hw *hw, int
fw_size = fw->size;
}

- /* allocate memory to read the header of the firmware on the
- * card
- */
- card_fw = kmalloc(sizeof(*card_fw), GFP_KERNEL);
-
/* upgrade FW logic */
ret = csio_hw_prep_fw(hw, fw_info, fw_data, fw_size, card_fw,
hw->fw_state, reset);

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