diff options
| author | Prabhath Sajeepa <psajeepa@purestorage.com> | 2019-10-28 16:56:48 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-11-04 10:56:42 -0700 |
| commit | 64fab7290dc3561729bbc1e35895a517eb2e549e (patch) | |
| tree | 5137177a5f13fea20d5a421883b728104e04f80e | |
| parent | 716fd9c119a982c34af196fe9205d7a617f38e3e (diff) | |
| download | linux-64fab7290dc3561729bbc1e35895a517eb2e549e.tar.bz2 | |
nvme: Fix parsing of ANA log page
Check validity of offset into ANA log buffer before accessing
nvme_ana_group_desc. This check ensures the size of ANA log buffer >=
offset + sizeof(nvme_ana_group_desc)
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Prabhath Sajeepa <psajeepa@purestorage.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | drivers/nvme/host/multipath.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 103c04fa7746..682be6195a95 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -445,8 +445,14 @@ static int nvme_parse_ana_log(struct nvme_ctrl *ctrl, void *data, for (i = 0; i < le16_to_cpu(ctrl->ana_log_buf->ngrps); i++) { struct nvme_ana_group_desc *desc = base + offset; - u32 nr_nsids = le32_to_cpu(desc->nnsids); - size_t nsid_buf_size = nr_nsids * sizeof(__le32); + u32 nr_nsids; + size_t nsid_buf_size; + + if (WARN_ON_ONCE(offset > ctrl->ana_log_size - sizeof(*desc))) + return -EINVAL; + + nr_nsids = le32_to_cpu(desc->nnsids); + nsid_buf_size = nr_nsids * sizeof(__le32); if (WARN_ON_ONCE(desc->grpid == 0)) return -EINVAL; @@ -466,8 +472,6 @@ static int nvme_parse_ana_log(struct nvme_ctrl *ctrl, void *data, return error; offset += nsid_buf_size; - if (WARN_ON_ONCE(offset > ctrl->ana_log_size - sizeof(*desc))) - return -EINVAL; } return 0; |