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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>
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716fd9c119
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1 changed files with 8 additions and 4 deletions
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@ -445,8 +445,14 @@ static int nvme_parse_ana_log(struct nvme_ctrl *ctrl, void *data,
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for (i = 0; i < le16_to_cpu(ctrl->ana_log_buf->ngrps); i++) {
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struct nvme_ana_group_desc *desc = base + offset;
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u32 nr_nsids = le32_to_cpu(desc->nnsids);
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size_t nsid_buf_size = nr_nsids * sizeof(__le32);
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u32 nr_nsids;
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size_t nsid_buf_size;
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if (WARN_ON_ONCE(offset > ctrl->ana_log_size - sizeof(*desc)))
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return -EINVAL;
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nr_nsids = le32_to_cpu(desc->nnsids);
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nsid_buf_size = nr_nsids * sizeof(__le32);
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if (WARN_ON_ONCE(desc->grpid == 0))
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return -EINVAL;
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@ -466,8 +472,6 @@ static int nvme_parse_ana_log(struct nvme_ctrl *ctrl, void *data,
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return error;
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offset += nsid_buf_size;
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if (WARN_ON_ONCE(offset > ctrl->ana_log_size - sizeof(*desc)))
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return -EINVAL;
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}
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return 0;
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