[PATCH AUTOSEL 4.19 16/28] nvme-multipath: zero out ANA log buffer
From: Sasha Levin <sashal@kernel.org>
Date: 2019-02-09 18:49:14
Also in:
linux-nvme, lkml
Subsystem:
nvm express driver, the rest · Maintainers:
Keith Busch, Jens Axboe, Christoph Hellwig, Sagi Grimberg, Linus Torvalds
From: Hannes Reinecke <hare@suse.de> [ Upstream commit c7055fd15ff46d92eb0dd1c16a4fe010d58224c8 ] When nvme_init_identify() fails the ANA log buffer is deallocated but _not_ set to NULL. This can cause double free oops when this controller is deleted without ever being reconnected. Signed-off-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/nvme/host/multipath.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index c27af277e14e..815509dbed84 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c@@ -556,6 +556,7 @@ int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) return 0; out_free_ana_log_buf: kfree(ctrl->ana_log_buf); + ctrl->ana_log_buf = NULL; out: return error; }
@@ -563,5 +564,6 @@ int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) void nvme_mpath_uninit(struct nvme_ctrl *ctrl) { kfree(ctrl->ana_log_buf); + ctrl->ana_log_buf = NULL; }
--
2.19.1