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nvmet: filter newlines from user input

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We should avoid consuming the newlines in traddr, trsvcid and
device_path. Add minimal processing to make sure they are gone.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Sagi Grimberg 2018-06-06 15:27:48 +03:00 committed by Jens Axboe
parent d4c68c7a8e
commit 9ba2a5cb88
1 changed files with 9 additions and 5 deletions
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14
drivers/nvme/target/configfs.c
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@ -137,8 +137,10 @@ static ssize_t nvmet_addr_traddr_store(struct config_item *item,
pr_err("Disable the address before modifying\n");
return -EACCES;
}
return snprintf(port->disc_addr.traddr,
sizeof(port->disc_addr.traddr), "%s", page);
if (sscanf(page, "%s\n", port->disc_addr.traddr) != 1)
return -EINVAL;
return count;
}
CONFIGFS_ATTR(nvmet_, addr_traddr);
@ -208,8 +210,10 @@ static ssize_t nvmet_addr_trsvcid_store(struct config_item *item,
pr_err("Disable the address before modifying\n");
return -EACCES;
}
return snprintf(port->disc_addr.trsvcid,
sizeof(port->disc_addr.trsvcid), "%s", page);
if (sscanf(page, "%s\n", port->disc_addr.trsvcid) != 1)
return -EINVAL;
return count;
}
CONFIGFS_ATTR(nvmet_, addr_trsvcid);
@ -288,7 +292,7 @@ static ssize_t nvmet_ns_device_path_store(struct config_item *item,
kfree(ns->device_path);
ret = -ENOMEM;
ns->device_path = kstrdup(page, GFP_KERNEL);
ns->device_path = kstrndup(page, strcspn(page, "\n"), GFP_KERNEL);
if (!ns->device_path)
goto out_unlock;