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authorAleksandr Miloserdov <a.miloserdov@yadro.com>2022-10-26 12:31:33 +0400
committerChristoph Hellwig <hch@lst.de>2022-11-09 14:28:27 +0100
commitbecc4cac309dc867571f0080fde4426a6c2222e0 (patch)
tree5d3cf283531e5fa848358e7ae66279d364004f23 /drivers/nvme/target
parentnvme: quiet user passthrough command errors (diff)
downloadlinux-dev-becc4cac309dc867571f0080fde4426a6c2222e0.tar.xz
linux-dev-becc4cac309dc867571f0080fde4426a6c2222e0.zip
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 <k.shelekhin@yadro.com> Reviewed-by: Dmitriy Bogdanov <d.bogdanov@yadro.com> Signed-off-by: Aleksandr Miloserdov <a.miloserdov@yadro.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to '')
-rw-r--r--drivers/nvme/target/configfs.c7
1 files changed, 5 insertions, 2 deletions
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;
}