>-Original Message-
>From: shuw...@redhat.com [mailto:shuw...@redhat.com]
>Sent: Friday, July 21, 2017 4:24 PM
>To: kashyap.de...@broadcom.com; sumit.sax...@broadcom.com;
>shivasharan.srikanteshw...@broadcom.com; j...@linux.vnet.ibm.com;
>martin.peter...@oracle.com
>Cc: megaraidlinux@broadcom.com; linux-scsi@vger.kernel.org; linux-
>ker...@vger.kernel.org; ch...@redhat.com; liw...@redhat.com; Shu Wang
>Subject: [PATCH] scsi: megaraid_sas: fix memleak in
>megasas_alloc_cmdlist_fusion
>
>From: Shu Wang
>
>Found this issue by kmemleak, a few kb mem was leaked in
>megasas_alloc_cmdlist_fusion when kzalloc failed for one
>megasas_cmd_fusion allocation.
>
>unreferenced object 0x88045dbd2000 (size 8192):
> comm "systemd-udevd", pid 323, jiffies 4294671759 (age 49.008s)
> backtrace:
>[] kmemleak_alloc+0x4a/0xa0
>[] __kmalloc+0xe8/0x220
>[] megasas_alloc_cmdlist_fusion+0x34/0xe0
>[megaraid_sas]
>(gdb) list *megasas_alloc_cmdlist_fusion+0x34
>0xd5c4 is in megasas_alloc_cmdlist_fusion
> (drivers/scsi/megaraid/megaraid_sas_fusion.c:443).
>[] megasas_alloc_cmds_fusion+0x25/0x410
>[megaraid_sas]
>[] megasas_init_adapter_fusion+0x21f/0x640
>[megaraid_sas]
>[] megasas_init_fw+0x357/0xd30 [megaraid_sas]
>[] megasas_probe_one.part.33+0x636/0x1100
>[megaraid_sas]
>[] megasas_probe_one+0x46/0xc0 [megaraid_sas]
>[] local_pci_probe+0x45/0xa0
>[] pci_device_probe+0x192/0x1b0
>[] driver_probe_device+0x2a8/0x460
>[] __driver_attach+0xdd/0xe0
>[] bus_for_each_dev+0x6c/0xc0
>[] driver_attach+0x1e/0x20
>[] bus_add_driver+0x45/0x270
>[] driver_register+0x60/0xe0 unreferenced object
>0x880454ce3600 (size 192):
> backtrace:
>[] kmemleak_alloc+0x4a/0xa0
>[] kmem_cache_alloc_trace+0xca/0x1d0
>[] megasas_alloc_cmdlist_fusion+0x77/0xe0
>[megaraid_sas]
>(gdb) list *megasas_alloc_cmdlist_fusion+0x77
>0xd607 is in megasas_alloc_cmdlist_fusion
>(drivers/scsi/megaraid/megaraid_sas_fusion.c:450).
>[] megasas_alloc_cmds_fusion+0x25/0x410
>[megaraid_sas]
>[] megasas_init_adapter_fusion+0x21f/0x640
>[megaraid_sas]
>[] megasas_init_fw+0x357/0xd30 [megaraid_sas]
>[] megasas_probe_one.part.33+0x636/0x1100
>[megaraid_sas]
>[] megasas_probe_one+0x46/0xc0 [megaraid_sas]
>[] local_pci_probe+0x45/0xa0
>[] pci_device_probe+0x192/0x1b0
>[] driver_probe_device+0x2a8/0x460
>[] __driver_attach+0xdd/0xe0
>[] bus_for_each_dev+0x6c/0xc0
>[] driver_attach+0x1e/0x20
>[] bus_add_driver+0x45/0x270
>[] driver_register+0x60/0xe0
>
>Signed-off-by: Shu Wang
>---
> drivers/scsi/megaraid/megaraid_sas_fusion.c | 6 +-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c
>b/drivers/scsi/megaraid/megaraid_sas_fusion.c
>index f990ab4d..9855106 100644
>--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
>+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
>@@ -425,7 +425,7 @@ static int megasas_create_sg_sense_fusion(struct
>megasas_instance *instance) int megasas_alloc_cmdlist_fusion(struct
>megasas_instance *instance) {
>- u32 max_mpt_cmd, i;
>+ u32 max_mpt_cmd, i, j;
> struct fusion_context *fusion;
>
> fusion = instance->ctrl_context;
>@@ -450,11 +450,15 @@ megasas_alloc_cmdlist_fusion(struct
>megasas_instance *instance)
> fusion->cmd_list[i] = kzalloc(sizeof(struct
>megasas_cmd_fusion),
> GFP_KERNEL);
> if (!fusion->cmd_list[i]) {
>+ for (j = 0; j < i; j++)
>+ kfree(fusion->cmd_list[j]);
>+ kfree(fusion->cmd_list);
> dev_err(&instance->pdev->dev,
> "Failed from %s %d\n", __func__,
__LINE__);
> return -ENOMEM;
> }
> }
>+
> return 0;
> }
> int
Acked-by: Sumit Saxena
>--
>2.5.0