| Message ID | 20180921204241.34316-1-briannorris@chromium.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ath10k: add missing sanity check on diag download | expand |
Brian Norris <briannorris@chromium.org> wrote: > ath10k_hw_diag_fast_download() generally has good boundary checking, but > it misses verifying that the next metadata header actually fits in the > remaining buffer space. Add such a check. > > Fixes: 39501ea64116 ("ath10k: download firmware via diag Copy Engine for QCA6174 and QCA9377.") > Signed-off-by: Brian Norris <briannorris@chromium.org> > Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Patch applied to ath-next branch of ath.git, thanks. e720ba1dcc33 ath10k: add missing sanity check on diag download
diff --git a/drivers/net/wireless/ath/ath10k/hw.c b/drivers/net/wireless/ath/ath10k/hw.c index 2c2870e3e84d..af8ae8117c62 100644 --- a/drivers/net/wireless/ath/ath10k/hw.c +++ b/drivers/net/wireless/ath/ath10k/hw.c @@ -1044,6 +1044,12 @@ int ath10k_hw_diag_fast_download(struct ath10k *ar, left = length - sizeof(*hdr); while (left > 0) { + if (left < sizeof(*metadata)) { + ath10k_warn(ar, "firmware segment is truncated: %d\n", + left); + ret = -EINVAL; + break; + } base_addr = __le32_to_cpu(metadata->addr); base_len = __le32_to_cpu(metadata->length); buf = metadata->data;
ath10k_hw_diag_fast_download() generally has good boundary checking, but it misses verifying that the next metadata header actually fits in the remaining buffer space. Add such a check. Fixes: 39501ea64116 ("ath10k: download firmware via diag Copy Engine for QCA6174 and QCA9377.") Signed-off-by: Brian Norris <briannorris@chromium.org> --- drivers/net/wireless/ath/ath10k/hw.c | 6 ++++++ 1 file changed, 6 insertions(+)