From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
To: linux-nvme@lists.infradead.org
Cc: hch@lst.de, Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Subject: [PATCH V2 3/3] nvmet: check sscanf value for subsys serial attr
Date: Wed, 27 Nov 2019 01:40:34 -0800 [thread overview]
Message-ID: <20191127094034.12334-4-chaitanya.kulkarni@wdc.com> (raw)
In-Reply-To: <20191127094034.12334-1-chaitanya.kulkarni@wdc.com>
For nvmet in configfs.c we check return values for all the sscanf()
calls. Add similar check into the nvmet_subsys_attr_serial_store().
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
Changes from V1:-
1. Use temp variable to scan the new serial value and retain original
value if sscanf() fails.
---
drivers/nvme/target/configfs.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index 4dea77a7da3e..0a19fd73979d 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -852,10 +852,13 @@ static ssize_t nvmet_subsys_attr_serial_show(struct config_item *item,
static ssize_t nvmet_subsys_attr_serial_store(struct config_item *item,
const char *page, size_t count)
{
- struct nvmet_subsys *subsys = to_subsys(item);
+ u64 serial;
+
+ if (sscanf(page, "%llx\n", &serial) != 1)
+ return -EINVAL;
down_write(&nvmet_config_sem);
- sscanf(page, "%llx\n", &subsys->serial);
+ to_subsys(item)->serial = serial;
up_write(&nvmet_config_sem);
return count;
--
2.22.1
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next prev parent reply other threads:[~2019-11-27 9:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-27 9:40 [PATCH 0/3] nvmet: make model/ctrl-id configurable, configfs fix Chaitanya Kulkarni
2019-11-27 9:40 ` [PATCH V3 1/3] nvmet: make ctrl-id configurable Chaitanya Kulkarni
2019-12-12 0:45 ` Sagi Grimberg
2019-12-12 9:22 ` Christoph Hellwig
2019-12-12 9:26 ` Christoph Hellwig
2019-12-16 20:40 ` Chaitanya Kulkarni
2019-11-27 9:40 ` [PATCH V4 2/3] nvmet: make ctrl model configurable Chaitanya Kulkarni
2019-12-12 0:45 ` Sagi Grimberg
2019-12-12 9:28 ` Christoph Hellwig
2019-12-12 9:46 ` Christoph Hellwig
2019-12-17 4:53 ` Chaitanya Kulkarni
2019-11-27 9:40 ` Chaitanya Kulkarni [this message]
2019-12-12 0:46 ` [PATCH V2 3/3] nvmet: check sscanf value for subsys serial attr Sagi Grimberg
2019-12-12 9:29 ` Christoph Hellwig
2019-12-11 5:35 ` [PATCH 0/3] nvmet: make model/ctrl-id configurable, configfs fix Chaitanya Kulkarni
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