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SCSI: megaraid_sas: fix memory leak if SGL has zero length entries

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commit 7a6a731bd00ca90d0e250867c3b9c05b5ff0fa49 upstream.

commit 98cb7e44 ([SCSI] megaraid_sas: Sanity check user
supplied length before passing it to dma_alloc_coherent())
introduced a memory leak.  Memory allocated for entries
following zero length SGL entries will not be freed.

Reference: http://bugs.debian.org/688198

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Acked-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bjørn Mork
2012-11-21 09:54:48 +01:00
committed by Greg Kroah-Hartman
parent e90c1dc2c6
commit 4ac697c53b
1 changed files with 6 additions and 4 deletions
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drivers/scsi/megaraid/megaraid_sas_base.c
+6 -4
View File
@@ -4852,10 +4852,12 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
sense, sense_handle);
}
for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
dma_free_coherent(&instance->pdev->dev,
kern_sge32[i].length,
kbuff_arr[i], kern_sge32[i].phys_addr);
for (i = 0; i < ioc->sge_count; i++) {
if (kbuff_arr[i])
dma_free_coherent(&instance->pdev->dev,
kern_sge32[i].length,
kbuff_arr[i],
kern_sge32[i].phys_addr);
}
megasas_return_cmd(instance, cmd);