* [PATCH][next] scsi: lpfc: Fix memory leak on lcb_context
@ 2020-11-18 14:13 Colin King
2020-11-19 20:58 ` James Smart
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Colin King @ 2020-11-18 14:13 UTC (permalink / raw)
To: James Smart, Dick Kennedy, James E . J . Bottomley,
Martin K . Petersen, linux-scsi
Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
Currently there is an error return path that neglects to free the
allocation for lcb_context. Fix this by adding a new error free
exit path that kfree's lcb_context before returning. Use this new
kfree exit path in another exit error path that also kfree's the same
object, allowing a line of code to be removed.
Addresses-Coverity: ("Resource leak")
Fixes: 4430f7fd09ec ("scsi: lpfc: Rework locations of ndlp reference taking")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/scsi/lpfc/lpfc_els.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 03f47d1b21fe..0d3271b4c130 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -6515,18 +6515,20 @@ lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
lcb_context->ndlp = lpfc_nlp_get(ndlp);
if (!lcb_context->ndlp) {
rjt_err = LSRJT_UNABLE_TPC;
- goto rjt;
+ goto rjt_free;
}
if (lpfc_sli4_set_beacon(vport, lcb_context, state)) {
lpfc_printf_vlog(ndlp->vport, KERN_ERR, LOG_TRACE_EVENT,
"0193 failed to send mail box");
- kfree(lcb_context);
lpfc_nlp_put(ndlp);
rjt_err = LSRJT_UNABLE_TPC;
- goto rjt;
+ goto rjt_free;
}
return 0;
+
+rjt_free:
+ kfree(lcb_context);
rjt:
memset(&stat, 0, sizeof(stat));
stat.un.b.lsRjtRsnCode = rjt_err;
--
2.28.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH][next] scsi: lpfc: Fix memory leak on lcb_context
2020-11-18 14:13 [PATCH][next] scsi: lpfc: Fix memory leak on lcb_context Colin King
@ 2020-11-19 20:58 ` James Smart
2020-11-20 3:17 ` Martin K. Petersen
2020-11-24 3:57 ` Martin K. Petersen
2 siblings, 0 replies; 4+ messages in thread
From: James Smart @ 2020-11-19 20:58 UTC (permalink / raw)
To: Colin King, Dick Kennedy, James E . J . Bottomley,
Martin K . Petersen, linux-scsi
Cc: kernel-janitors, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 1661 bytes --]
On 11/18/2020 6:13 AM, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Currently there is an error return path that neglects to free the
> allocation for lcb_context. Fix this by adding a new error free
> exit path that kfree's lcb_context before returning. Use this new
> kfree exit path in another exit error path that also kfree's the same
> object, allowing a line of code to be removed.
>
> Addresses-Coverity: ("Resource leak")
> Fixes: 4430f7fd09ec ("scsi: lpfc: Rework locations of ndlp reference taking")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/scsi/lpfc/lpfc_els.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
> index 03f47d1b21fe..0d3271b4c130 100644
> --- a/drivers/scsi/lpfc/lpfc_els.c
> +++ b/drivers/scsi/lpfc/lpfc_els.c
> @@ -6515,18 +6515,20 @@ lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
> lcb_context->ndlp = lpfc_nlp_get(ndlp);
> if (!lcb_context->ndlp) {
> rjt_err = LSRJT_UNABLE_TPC;
> - goto rjt;
> + goto rjt_free;
> }
>
> if (lpfc_sli4_set_beacon(vport, lcb_context, state)) {
> lpfc_printf_vlog(ndlp->vport, KERN_ERR, LOG_TRACE_EVENT,
> "0193 failed to send mail box");
> - kfree(lcb_context);
> lpfc_nlp_put(ndlp);
> rjt_err = LSRJT_UNABLE_TPC;
> - goto rjt;
> + goto rjt_free;
> }
> return 0;
> +
> +rjt_free:
> + kfree(lcb_context);
> rjt:
> memset(&stat, 0, sizeof(stat));
> stat.un.b.lsRjtRsnCode = rjt_err;
Looks good.
Reviewed-by: James Smart <james.smart@broadcom.com>
-- james
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH][next] scsi: lpfc: Fix memory leak on lcb_context
2020-11-18 14:13 [PATCH][next] scsi: lpfc: Fix memory leak on lcb_context Colin King
2020-11-19 20:58 ` James Smart
@ 2020-11-20 3:17 ` Martin K. Petersen
2020-11-24 3:57 ` Martin K. Petersen
2 siblings, 0 replies; 4+ messages in thread
From: Martin K. Petersen @ 2020-11-20 3:17 UTC (permalink / raw)
To: Colin King
Cc: James Smart, Dick Kennedy, James E . J . Bottomley,
Martin K . Petersen, linux-scsi, kernel-janitors, linux-kernel
Colin,
> Currently there is an error return path that neglects to free the
> allocation for lcb_context. Fix this by adding a new error free exit
> path that kfree's lcb_context before returning. Use this new kfree
> exit path in another exit error path that also kfree's the same
> object, allowing a line of code to be removed.
Applied to 5.11/scsi-staging, thanks!
--
Martin K. Petersen Oracle Linux Engineering
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH][next] scsi: lpfc: Fix memory leak on lcb_context
2020-11-18 14:13 [PATCH][next] scsi: lpfc: Fix memory leak on lcb_context Colin King
2020-11-19 20:58 ` James Smart
2020-11-20 3:17 ` Martin K. Petersen
@ 2020-11-24 3:57 ` Martin K. Petersen
2 siblings, 0 replies; 4+ messages in thread
From: Martin K. Petersen @ 2020-11-24 3:57 UTC (permalink / raw)
To: linux-scsi, James Smart, Colin King, James E . J . Bottomley,
Dick Kennedy
Cc: Martin K . Petersen, kernel-janitors, linux-kernel
On Wed, 18 Nov 2020 14:13:14 +0000, Colin King wrote:
> Currently there is an error return path that neglects to free the
> allocation for lcb_context. Fix this by adding a new error free
> exit path that kfree's lcb_context before returning. Use this new
> kfree exit path in another exit error path that also kfree's the same
> object, allowing a line of code to be removed.
Applied to 5.11/scsi-queue, thanks!
[1/1] scsi: lpfc: Fix memory leak on lcb_context
https://git.kernel.org/mkp/scsi/c/14c1dd950411
--
Martin K. Petersen Oracle Linux Engineering
^ permalink raw reply [flat|nested] 4+ messages in thread
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2020-11-18 14:13 [PATCH][next] scsi: lpfc: Fix memory leak on lcb_context Colin King
2020-11-19 20:58 ` James Smart
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2020-11-24 3:57 ` Martin K. Petersen
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