2018-02-07 13:51:29

by Kalle Valo

Subject: [PATCH] Revert "ath10k: add sanity check to ie_len before parsing fw/board ie"

From: Ryan Hsu <[email protected]>

This reverts commit 9ed4f91628737c820af6a1815b65bc06bd31518f.

The commit introduced a regression that over read the ie with
the padding.

- the expected IE information

ath10k_pci 0000:03:00.0: found firmware features ie (1 B)
ath10k_pci 0000:03:00.0: Enabling feature bit: 6
ath10k_pci 0000:03:00.0: Enabling feature bit: 7
ath10k_pci 0000:03:00.0: features
ath10k_pci 0000:03:00.0: 00000000: c0 00 00 00 00 00 00 00

- the wrong IE with padding is read (0x77)

ath10k_pci 0000:03:00.0: found firmware features ie (4 B)
ath10k_pci 0000:03:00.0: Enabling feature bit: 6
ath10k_pci 0000:03:00.0: Enabling feature bit: 7
ath10k_pci 0000:03:00.0: Enabling feature bit: 8
ath10k_pci 0000:03:00.0: Enabling feature bit: 9
ath10k_pci 0000:03:00.0: Enabling feature bit: 10
ath10k_pci 0000:03:00.0: Enabling feature bit: 12
ath10k_pci 0000:03:00.0: Enabling feature bit: 13
ath10k_pci 0000:03:00.0: Enabling feature bit: 14
ath10k_pci 0000:03:00.0: Enabling feature bit: 16
ath10k_pci 0000:03:00.0: Enabling feature bit: 17
ath10k_pci 0000:03:00.0: Enabling feature bit: 18
ath10k_pci 0000:03:00.0: features
ath10k_pci 0000:03:00.0: 00000000: c0 77 07 00 00 00 00 00

Signed-off-by: Ryan Hsu <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
---
drivers/net/wireless/ath/ath10k/core.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index b0fdc1023619..fe9341c97f31 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -1276,10 +1276,7 @@ static int ath10k_core_fetch_board_data_api_n(struct ath10k *ar,
len -= sizeof(*hdr);
data = hdr->data;

- /* jump over the padding */
- ie_len = ALIGN(ie_len, 4);
-
- if (len < ie_len) {
+ if (len < ALIGN(ie_len, 4)) {
ath10k_err(ar, "invalid length for board ie_id %d ie_len %zu len %zu\n",
ie_id, ie_len, len);
ret = -EINVAL;
@@ -1318,6 +1315,9 @@ static int ath10k_core_fetch_board_data_api_n(struct ath10k *ar,
goto out;
}

+ /* jump over the padding */
+ ie_len = ALIGN(ie_len, 4);
+
len -= ie_len;
data += ie_len;
}
@@ -1448,9 +1448,6 @@ int ath10k_core_fetch_firmware_api_n(struct ath10k *ar, const char *name,
len -= sizeof(*hdr);
data += sizeof(*hdr);

- /* jump over the padding */
- ie_len = ALIGN(ie_len, 4);
-
if (len < ie_len) {
ath10k_err(ar, "invalid length for FW IE %d (%zu < %zu)\n",
ie_id, len, ie_len);
@@ -1556,6 +1553,9 @@ int ath10k_core_fetch_firmware_api_n(struct ath10k *ar, const char *name,
break;
}

+ /* jump over the padding */
+ ie_len = ALIGN(ie_len, 4);
+
len -= ie_len;
data += ie_len;
}
--
2.7.4

2018-02-07 14:28:06

by Mike Lothian

Subject: Re: [PATCH] Revert "ath10k: add sanity check to ie_len before parsing fw/board ie"

On 7 February 2018 at 13:51, Kalle Valo <[email protected]> wrote:
> From: Ryan Hsu <[email protected]>
>
> This reverts commit 9ed4f91628737c820af6a1815b65bc06bd31518f.
>
> The commit introduced a regression that over read the ie with
> the padding.
>
> - the expected IE information
>
> ath10k_pci 0000:03:00.0: found firmware features ie (1 B)
> ath10k_pci 0000:03:00.0: Enabling feature bit: 6
> ath10k_pci 0000:03:00.0: Enabling feature bit: 7
> ath10k_pci 0000:03:00.0: features
> ath10k_pci 0000:03:00.0: 00000000: c0 00 00 00 00 00 00 00
>
> - the wrong IE with padding is read (0x77)
>
> ath10k_pci 0000:03:00.0: found firmware features ie (4 B)
> ath10k_pci 0000:03:00.0: Enabling feature bit: 6
> ath10k_pci 0000:03:00.0: Enabling feature bit: 7
> ath10k_pci 0000:03:00.0: Enabling feature bit: 8
> ath10k_pci 0000:03:00.0: Enabling feature bit: 9
> ath10k_pci 0000:03:00.0: Enabling feature bit: 10
> ath10k_pci 0000:03:00.0: Enabling feature bit: 12
> ath10k_pci 0000:03:00.0: Enabling feature bit: 13
> ath10k_pci 0000:03:00.0: Enabling feature bit: 14
> ath10k_pci 0000:03:00.0: Enabling feature bit: 16
> ath10k_pci 0000:03:00.0: Enabling feature bit: 17
> ath10k_pci 0000:03:00.0: Enabling feature bit: 18
> ath10k_pci 0000:03:00.0: features
> ath10k_pci 0000:03:00.0: 00000000: c0 77 07 00 00 00 00 00
>
> Signed-off-by: Ryan Hsu <[email protected]>
> Signed-off-by: Kalle Valo <[email protected]>
> ---
> drivers/net/wireless/ath/ath10k/core.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
> index b0fdc1023619..fe9341c97f31 100644
> --- a/drivers/net/wireless/ath/ath10k/core.c
> +++ b/drivers/net/wireless/ath/ath10k/core.c
> @@ -1276,10 +1276,7 @@ static int ath10k_core_fetch_board_data_api_n(struct ath10k *ar,
> len -= sizeof(*hdr);
> data = hdr->data;
>
> - /* jump over the padding */
> - ie_len = ALIGN(ie_len, 4);
> -
> - if (len < ie_len) {
> + if (len < ALIGN(ie_len, 4)) {
> ath10k_err(ar, "invalid length for board ie_id %d ie_len %zu len %zu\n",
> ie_id, ie_len, len);
> ret = -EINVAL;
> @@ -1318,6 +1315,9 @@ static int ath10k_core_fetch_board_data_api_n(struct ath10k *ar,
> goto out;
> }
>
> + /* jump over the padding */
> + ie_len = ALIGN(ie_len, 4);
> +
> len -= ie_len;
> data += ie_len;
> }
> @@ -1448,9 +1448,6 @@ int ath10k_core_fetch_firmware_api_n(struct ath10k *ar, const char *name,
> len -= sizeof(*hdr);
> data += sizeof(*hdr);
>
> - /* jump over the padding */
> - ie_len = ALIGN(ie_len, 4);
> -
> if (len < ie_len) {
> ath10k_err(ar, "invalid length for FW IE %d (%zu < %zu)\n",
> ie_id, len, ie_len);
> @@ -1556,6 +1553,9 @@ int ath10k_core_fetch_firmware_api_n(struct ath10k *ar, const char *name,
> break;
> }
>
> + /* jump over the padding */
> + ie_len = ALIGN(ie_len, 4);
> +
> len -= ie_len;
> data += ie_len;
> }
> --
> 2.7.4
>

Tested-by: Mike Lothian <[email protected]>

Sent at HTML the first time sorry

2018-02-08 12:41:46

by Kalle Valo

Subject: Re: Revert "ath10k: add sanity check to ie_len before parsing fw/board ie"

Kalle Valo <[email protected]> wrote:

> This reverts commit 9ed4f91628737c820af6a1815b65bc06bd31518f.
>
> The commit introduced a regression that over read the ie with
> the padding.
>
> - the expected IE information
>
> ath10k_pci 0000:03:00.0: found firmware features ie (1 B)
> ath10k_pci 0000:03:00.0: Enabling feature bit: 6
> ath10k_pci 0000:03:00.0: Enabling feature bit: 7
> ath10k_pci 0000:03:00.0: features
> ath10k_pci 0000:03:00.0: 00000000: c0 00 00 00 00 00 00 00
>
> - the wrong IE with padding is read (0x77)
>
> ath10k_pci 0000:03:00.0: found firmware features ie (4 B)
> ath10k_pci 0000:03:00.0: Enabling feature bit: 6
> ath10k_pci 0000:03:00.0: Enabling feature bit: 7
> ath10k_pci 0000:03:00.0: Enabling feature bit: 8
> ath10k_pci 0000:03:00.0: Enabling feature bit: 9
> ath10k_pci 0000:03:00.0: Enabling feature bit: 10
> ath10k_pci 0000:03:00.0: Enabling feature bit: 12
> ath10k_pci 0000:03:00.0: Enabling feature bit: 13
> ath10k_pci 0000:03:00.0: Enabling feature bit: 14
> ath10k_pci 0000:03:00.0: Enabling feature bit: 16
> ath10k_pci 0000:03:00.0: Enabling feature bit: 17
> ath10k_pci 0000:03:00.0: Enabling feature bit: 18
> ath10k_pci 0000:03:00.0: features
> ath10k_pci 0000:03:00.0: 00000000: c0 77 07 00 00 00 00 00
>
> Tested-by: Mike Lothian <[email protected]>
> Signed-off-by: Ryan Hsu <[email protected]>
> Signed-off-by: Kalle Valo <[email protected]>

Patch applied to ath-current branch of ath.git, thanks.

9ce8b24aa96e Revert "ath10k: add sanity check to ie_len before parsing fw/board ie"

--
https://patchwork.kernel.org/patch/10205215/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches