From becc4cac309dc867571f0080fde4426a6c2222e0 Mon Sep 17 00:00:00 2001 From: Aleksandr Miloserdov Date: Wed, 26 Oct 2022 12:31:33 +0400 Subject: nvmet: fix memory leak in nvmet_subsys_attr_model_store_locked Since model_number is allocated before it needs to be freed before kmemdump_nul. Reviewed-by: Konstantin Shelekhin Reviewed-by: Dmitriy Bogdanov Signed-off-by: Aleksandr Miloserdov Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- drivers/nvme/target/configfs.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'drivers/nvme/target/configfs.c') diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c index 9443ee1d4ae3..d0b9eea15ff8 100644 --- a/drivers/nvme/target/configfs.c +++ b/drivers/nvme/target/configfs.c @@ -1215,6 +1215,7 @@ static ssize_t nvmet_subsys_attr_model_store_locked(struct nvmet_subsys *subsys, const char *page, size_t count) { int pos = 0, len; + char *val; if (subsys->subsys_discovered) { pr_err("Can't set model number. %s is already assigned\n", @@ -1237,9 +1238,11 @@ static ssize_t nvmet_subsys_attr_model_store_locked(struct nvmet_subsys *subsys, return -EINVAL; } - subsys->model_number = kmemdup_nul(page, len, GFP_KERNEL); - if (!subsys->model_number) + val = kmemdup_nul(page, len, GFP_KERNEL); + if (!val) return -ENOMEM; + kfree(subsys->model_number); + subsys->model_number = val; return count; } -- cgit v1.2.3-59-g8ed1b