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Re: [PATCH 2/9] hw/block/nvme: fix log page offset check
From: |
Klaus Jensen |
Subject: |
Re: [PATCH 2/9] hw/block/nvme: fix log page offset check |
Date: |
Thu, 1 Oct 2020 06:05:37 +0200 |
On Sep 30 15:04, Keith Busch wrote:
> Return error if the requested offset starts after the size of the log
> being returned. Also, move the check for earlier in the function so
> we're not doing unnecessary calculations.
>
> Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
> ---
> hw/block/nvme.c | 22 ++++++++++------------
> 1 file changed, 10 insertions(+), 12 deletions(-)
>
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index db52ea0db9..8d2b5be567 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -1179,6 +1179,10 @@ static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t
> rae, uint32_t buf_len,
> return NVME_INVALID_FIELD | NVME_DNR;
> }
>
> + if (off >= sizeof(smart)) {
> + return NVME_INVALID_FIELD | NVME_DNR;
> + }
> +
> for (int i = 1; i <= n->num_namespaces; i++) {
> NvmeNamespace *ns = nvme_ns(n, i);
> if (!ns) {
> @@ -1193,10 +1197,6 @@ static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t
> rae, uint32_t buf_len,
> write_commands += s->nr_ops[BLOCK_ACCT_WRITE];
> }
>
> - if (off > sizeof(smart)) {
> - return NVME_INVALID_FIELD | NVME_DNR;
> - }
> -
> trans_len = MIN(sizeof(smart) - off, buf_len);
>
> memset(&smart, 0x0, sizeof(smart));
> @@ -1234,12 +1234,11 @@ static uint16_t nvme_fw_log_info(NvmeCtrl *n,
> uint32_t buf_len, uint64_t off,
> .afi = 0x1,
> };
>
> - strpadcpy((char *)&fw_log.frs1, sizeof(fw_log.frs1), "1.0", ' ');
> -
> - if (off > sizeof(fw_log)) {
> + if (off >= sizeof(fw_log)) {
> return NVME_INVALID_FIELD | NVME_DNR;
> }
>
> + strpadcpy((char *)&fw_log.frs1, sizeof(fw_log.frs1), "1.0", ' ');
> trans_len = MIN(sizeof(fw_log) - off, buf_len);
>
> return nvme_dma(n, (uint8_t *) &fw_log + off, trans_len,
> @@ -1252,16 +1251,15 @@ static uint16_t nvme_error_info(NvmeCtrl *n, uint8_t
> rae, uint32_t buf_len,
> uint32_t trans_len;
> NvmeErrorLog errlog;
>
> - if (!rae) {
> - nvme_clear_events(n, NVME_AER_TYPE_ERROR);
> + if (off >= sizeof(errlog)) {
> + return NVME_INVALID_FIELD | NVME_DNR;
> }
>
> - if (off > sizeof(errlog)) {
> - return NVME_INVALID_FIELD | NVME_DNR;
> + if (!rae) {
> + nvme_clear_events(n, NVME_AER_TYPE_ERROR);
> }
>
> memset(&errlog, 0x0, sizeof(errlog));
> -
> trans_len = MIN(sizeof(errlog) - off, buf_len);
>
> return nvme_dma(n, (uint8_t *)&errlog, trans_len,
> --
> 2.24.1
>
>
--
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