* [ndctl patch] btt_check_bitmap: initialize rc
@ 2017-10-20 15:58 Jeff Moyer
2017-10-31 19:32 ` Vishal Verma
0 siblings, 1 reply; 2+ messages in thread
From: Jeff Moyer @ 2017-10-20 15:58 UTC (permalink / raw)
To: vishal.verma, dan.j.williams; +Cc: linux-nvdimm
It may be possible that rc is never set before returning from
the function. nfree would have to be zero, and the bitmap
would have to be full. Fix it.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
diff --git a/ndctl/check.c b/ndctl/check.c
index 915bb9d..dafd6a8 100644
--- a/ndctl/check.c
+++ b/ndctl/check.c
@@ -508,7 +508,7 @@ static int btt_check_bitmap(struct arena_info *a)
{
unsigned long *bm;
u32 i, btt_mapping;
- int rc;
+ int rc = BTT_BITMAP_ERROR;
bm = bitmap_alloc(a->internal_nlba);
if (bm == NULL)
@@ -521,7 +521,6 @@ static int btt_check_bitmap(struct arena_info *a)
info(a->bttc,
"arena %d: internal block %#x is referenced by two map entries\n",
a->num, btt_mapping);
- rc = BTT_BITMAP_ERROR;
goto out;
}
bitmap_set(bm, btt_mapping, 1);
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [ndctl patch] btt_check_bitmap: initialize rc
2017-10-20 15:58 [ndctl patch] btt_check_bitmap: initialize rc Jeff Moyer
@ 2017-10-31 19:32 ` Vishal Verma
0 siblings, 0 replies; 2+ messages in thread
From: Vishal Verma @ 2017-10-31 19:32 UTC (permalink / raw)
To: Jeff Moyer; +Cc: vishal.verma, linux-nvdimm
On 10/20, Jeff Moyer wrote:
> It may be possible that rc is never set before returning from
> the function. nfree would have to be zero, and the bitmap
> would have to be full. Fix it.
>
> Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Ah so it shouldn't ever happen in practice, but I can see how a static
checker may complain about it. The patch looks good to me.
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
>
> diff --git a/ndctl/check.c b/ndctl/check.c
> index 915bb9d..dafd6a8 100644
> --- a/ndctl/check.c
> +++ b/ndctl/check.c
> @@ -508,7 +508,7 @@ static int btt_check_bitmap(struct arena_info *a)
> {
> unsigned long *bm;
> u32 i, btt_mapping;
> - int rc;
> + int rc = BTT_BITMAP_ERROR;
>
> bm = bitmap_alloc(a->internal_nlba);
> if (bm == NULL)
> @@ -521,7 +521,6 @@ static int btt_check_bitmap(struct arena_info *a)
> info(a->bttc,
> "arena %d: internal block %#x is referenced by two map entries\n",
> a->num, btt_mapping);
> - rc = BTT_BITMAP_ERROR;
> goto out;
> }
> bitmap_set(bm, btt_mapping, 1);
> _______________________________________________
> Linux-nvdimm mailing list
> Linux-nvdimm@lists.01.org
> https://lists.01.org/mailman/listinfo/linux-nvdimm
_______________________________________________
Linux-nvdimm mailing list
Linux-nvdimm@lists.01.org
https://lists.01.org/mailman/listinfo/linux-nvdimm
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2017-10-20 15:58 [ndctl patch] btt_check_bitmap: initialize rc Jeff Moyer
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