diff options
author | Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> | 2024-03-06 09:03:03 +0300 |
---|---|---|
committer | Sasha Levin <sashal@kernel.org> | 2024-03-27 01:16:29 +0300 |
commit | 534f9dc7fe495b3f9cc84363898ac50c5a25fccb (patch) | |
tree | 0b1d918ff0901c420489d1849cc23bc737284fe9 /drivers | |
parent | b6563ad0d599110bd5cf8f56c47d279c3ed796fe (diff) | |
download | linux-534f9dc7fe495b3f9cc84363898ac50c5a25fccb.tar.xz |
nvme: host: fix double-free of struct nvme_id_ns in ns_update_nuse()
[ Upstream commit 8d0d2447394b13fb22a069f0330f9c49b7fff9d3 ]
When nvme_identify_ns() fails, it frees the pointer to the struct
nvme_id_ns before it returns. However, ns_update_nuse() calls kfree()
for the pointer even when nvme_identify_ns() fails. This results in
KASAN double-free, which was observed with blktests nvme/045 with
proposed patches [1] on the kernel v6.8-rc7. Fix the double-free by
skipping kfree() when nvme_identify_ns() fails.
Link: https://lore.kernel.org/linux-block/20240304161303.19681-1-dwagner@suse.de/ [1]
Fixes: a1a825ab6a60 ("nvme: add csi, ms and nuse to sysfs")
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/nvme/host/sysfs.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/nvme/host/sysfs.c b/drivers/nvme/host/sysfs.c index f2832f70e7e0..09fcaa519e5b 100644 --- a/drivers/nvme/host/sysfs.c +++ b/drivers/nvme/host/sysfs.c @@ -221,14 +221,11 @@ static int ns_update_nuse(struct nvme_ns *ns) ret = nvme_identify_ns(ns->ctrl, ns->head->ns_id, &id); if (ret) - goto out_free_id; + return ret; ns->head->nuse = le64_to_cpu(id->nuse); - -out_free_id: kfree(id); - - return ret; + return 0; } static ssize_t nuse_show(struct device *dev, struct device_attribute *attr, |