nvme: host: fix double-free of struct nvme_id_ns in ns_update_nuse()

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/[email protected]/ [1]
Fixes: a1a825ab6a60 ("nvme: add csi, ms and nuse to sysfs")
Signed-off-by: Shin'ichiro Kawasaki <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Daniel Wagner <[email protected]>
Reviewed-by: Chaitanya Kulkarni <[email protected]>
Signed-off-by: Keith Busch <[email protected]>

0 files changed, 0 insertions, 0 deletions