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fpga: m10bmc-sec: Fix possible memory leak of flash_buf 

There is an error check following the allocation of flash_buf that returns
without freeing flash_buf. It makes more sense to do the error check
before the allocation and the reordering eliminates the memory leak.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 154afa5c31 ("fpga: m10bmc-sec: expose max10 flash update count")
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Reviewed-by: Tom Rix <trix@redhat.com>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220916235205.106873-1-russell.h.weight@intel.com
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
This commit is contained in:
Russ Weight 2022-09-16 16:52:05 -07:00 committed by Xu Yilun
parent 568035b01c
commit 468c9d928a
No known key found for this signature in database
GPG Key ID: FCB70381A4A08CDA
1 changed files with 4 additions and 4 deletions
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8
drivers/fpga/intel-m10-bmc-sec-update.c
View File

@ -148,10 +148,6 @@ static ssize_t flash_count_show(struct device *dev,
stride = regmap_get_reg_stride(sec->m10bmc->regmap);
num_bits = FLASH_COUNT_SIZE * 8;
flash_buf = kmalloc(FLASH_COUNT_SIZE, GFP_KERNEL);
if (!flash_buf)
return -ENOMEM;
if (FLASH_COUNT_SIZE % stride) {
dev_err(sec->dev,
"FLASH_COUNT_SIZE (0x%x) not aligned to stride (0x%x)\n",
@ -160,6 +156,10 @@ static ssize_t flash_count_show(struct device *dev,
return -EINVAL;
}
flash_buf = kmalloc(FLASH_COUNT_SIZE, GFP_KERNEL);
if (!flash_buf)
return -ENOMEM;
ret = regmap_bulk_read(sec->m10bmc->regmap, STAGING_FLASH_COUNT,
flash_buf, FLASH_COUNT_SIZE / stride);
if (ret) {