[PATCH 3.12 22/83] nbd: fix possible memory leak

From: Jiri Slaby
Date: Mon Apr 27 2015 - 17:51:16 EST


From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

commit ff6b8090e26ef7649ef0cc6b42389141ef48b0cf upstream.

we have already allocated memory for nbd_dev, but we were not
releasing that memory and just returning the error value.

Signed-off-by: Sudip Mukherjee <sudip@xxxxxxxxxxxxxxx>
Acked-by: Paul Clements <Paul.Clements@xxxxxxxxxxxx>
Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/block/nbd.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 2dc3b5153f0d..b71f4397bcfb 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -814,10 +814,6 @@ static int __init nbd_init(void)
return -EINVAL;
}

- nbd_dev = kcalloc(nbds_max, sizeof(*nbd_dev), GFP_KERNEL);
- if (!nbd_dev)
- return -ENOMEM;
-
part_shift = 0;
if (max_part > 0) {
part_shift = fls(max_part);
@@ -839,6 +835,10 @@ static int __init nbd_init(void)
if (nbds_max > 1UL << (MINORBITS - part_shift))
return -EINVAL;

+ nbd_dev = kcalloc(nbds_max, sizeof(*nbd_dev), GFP_KERNEL);
+ if (!nbd_dev)
+ return -ENOMEM;
+
for (i = 0; i < nbds_max; i++) {
struct gendisk *disk = alloc_disk(1 << part_shift);
if (!disk)
--
2.3.5

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