From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= Date: Wed, 21 Nov 2012 09:54:48 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Subject: [PATCH] megaraid_sas: fix memory leak if SGL has zero length entries Content-Transfer-Encoding: 8bit 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 Cc: Signed-off-by: Bjørn Mork Acked-by: Adam Radford --- drivers/scsi/megaraid/megaraid_sas_base.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -4886,10 +4886,12 @@ megasas_mgmt_fw_ioctl(struct megasas_ins 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);