| Message ID | 20181005184245.GA11700@embeddedor.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ath10k: htt_rx: Fix signedness bug in ath10k_update_per_peer_tx_stats | expand |
On 10/05/2018 11:42 AM, Gustavo A. R. Silva wrote: > Currently, the error handling for the call to function > ath10k_get_legacy_rate_idx() doesn't work because > *rate_idx* is of type u8 (8 bits, unsigned), which > makes it impossible for it to hold a value less > than 0. > > Fix this by changing the type of variable *rate_idx* > to s8 (8 bits, signed). There are more than 127 rates, are you sure this is doing what you want? Thanks, Ben > > Addresses-Coverity-ID: 1473914 ("Unsigned compared against 0") > Fixes: 0189dbd71cbd ("ath10k: get the legacy rate index to update the txrate table") > Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> > --- > drivers/net/wireless/ath/ath10k/htt_rx.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c > index f240525..edd0e74 100644 > --- a/drivers/net/wireless/ath/ath10k/htt_rx.c > +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c > @@ -2753,7 +2753,8 @@ ath10k_update_per_peer_tx_stats(struct ath10k *ar, > struct ath10k_per_peer_tx_stats *peer_stats) > { > struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; > - u8 rate = 0, rate_idx = 0, sgi; > + u8 rate = 0, sgi; > + s8 rate_idx = 0; > struct rate_info txrate; > > lockdep_assert_held(&ar->data_lock); >
On 10/5/18 9:09 PM, Ben Greear wrote: > On 10/05/2018 11:42 AM, Gustavo A. R. Silva wrote: >> Currently, the error handling for the call to function >> ath10k_get_legacy_rate_idx() doesn't work because >> *rate_idx* is of type u8 (8 bits, unsigned), which >> makes it impossible for it to hold a value less >> than 0. >> >> Fix this by changing the type of variable *rate_idx* >> to s8 (8 bits, signed). > > There are more than 127 rates, are you sure this is doing > what you want? > Based on the following function, rate_idx can only hold values from 0 to 11 static inline int ath10k_get_legacy_rate_idx(struct ath10k *ar, u8 rate) { static const u8 legacy_rates[] = {1, 2, 5, 11, 6, 9, 12, 18, 24, 36, 48, 54}; int i; for (i = 0; i < ARRAY_SIZE(legacy_rates); i++) { if (rate == legacy_rates[i]) return i; } ath10k_warn(ar, "Invalid legacy rate %hhd peer stats", rate); return -EINVAL; } Thanks -- Gustavo > Thanks, > Ben > >> >> Addresses-Coverity-ID: 1473914 ("Unsigned compared against 0") >> Fixes: 0189dbd71cbd ("ath10k: get the legacy rate index to update the txrate table") >> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> >> --- >> drivers/net/wireless/ath/ath10k/htt_rx.c | 3 ++- >> 1 file changed, 2 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c >> index f240525..edd0e74 100644 >> --- a/drivers/net/wireless/ath/ath10k/htt_rx.c >> +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c >> @@ -2753,7 +2753,8 @@ ath10k_update_per_peer_tx_stats(struct ath10k *ar, >> struct ath10k_per_peer_tx_stats *peer_stats) >> { >> struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; >> - u8 rate = 0, rate_idx = 0, sgi; >> + u8 rate = 0, sgi; >> + s8 rate_idx = 0; >> struct rate_info txrate; >> >> lockdep_assert_held(&ar->data_lock); >> > >
On 10/5/18 9:14 PM, Gustavo A. R. Silva wrote: > > > On 10/5/18 9:09 PM, Ben Greear wrote: >> On 10/05/2018 11:42 AM, Gustavo A. R. Silva wrote: >>> Currently, the error handling for the call to function >>> ath10k_get_legacy_rate_idx() doesn't work because >>> *rate_idx* is of type u8 (8 bits, unsigned), which >>> makes it impossible for it to hold a value less >>> than 0. >>> >>> Fix this by changing the type of variable *rate_idx* >>> to s8 (8 bits, signed). >> >> There are more than 127 rates, are you sure this is doing >> what you want? >> > > Based on the following function, rate_idx can only hold values from 0 to 11 > ... and of course -EINVAL too > static inline int ath10k_get_legacy_rate_idx(struct ath10k *ar, u8 rate) > { > static const u8 legacy_rates[] = {1, 2, 5, 11, 6, 9, 12, > 18, 24, 36, 48, 54}; > int i; > > for (i = 0; i < ARRAY_SIZE(legacy_rates); i++) { > if (rate == legacy_rates[i]) > return i; > } > > ath10k_warn(ar, "Invalid legacy rate %hhd peer stats", rate); > return -EINVAL; > } > > Thanks > -- > Gustavo > >> Thanks, >> Ben >> >>> >>> Addresses-Coverity-ID: 1473914 ("Unsigned compared against 0") >>> Fixes: 0189dbd71cbd ("ath10k: get the legacy rate index to update the txrate table") >>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> >>> --- >>> drivers/net/wireless/ath/ath10k/htt_rx.c | 3 ++- >>> 1 file changed, 2 insertions(+), 1 deletion(-) >>> >>> diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c >>> index f240525..edd0e74 100644 >>> --- a/drivers/net/wireless/ath/ath10k/htt_rx.c >>> +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c >>> @@ -2753,7 +2753,8 @@ ath10k_update_per_peer_tx_stats(struct ath10k *ar, >>> struct ath10k_per_peer_tx_stats *peer_stats) >>> { >>> struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; >>> - u8 rate = 0, rate_idx = 0, sgi; >>> + u8 rate = 0, sgi; >>> + s8 rate_idx = 0; >>> struct rate_info txrate; >>> >>> lockdep_assert_held(&ar->data_lock); >>> >> >>
On 2018-10-06 00:45, Gustavo A. R. Silva wrote: > On 10/5/18 9:14 PM, Gustavo A. R. Silva wrote: >> >> >> On 10/5/18 9:09 PM, Ben Greear wrote: >>> On 10/05/2018 11:42 AM, Gustavo A. R. Silva wrote: >>>> Currently, the error handling for the call to function >>>> ath10k_get_legacy_rate_idx() doesn't work because >>>> *rate_idx* is of type u8 (8 bits, unsigned), which >>>> makes it impossible for it to hold a value less >>>> than 0. >>>> >>>> Fix this by changing the type of variable *rate_idx* >>>> to s8 (8 bits, signed). >>> >>> There are more than 127 rates, are you sure this is doing >>> what you want? >>> >> >> Based on the following function, rate_idx can only hold values from 0 >> to 11 >> > > ... and of course -EINVAL too > >> static inline int ath10k_get_legacy_rate_idx(struct ath10k *ar, u8 >> rate) >> { >> static const u8 legacy_rates[] = {1, 2, 5, 11, 6, 9, 12, >> 18, 24, 36, 48, 54}; >> int i; >> >> for (i = 0; i < ARRAY_SIZE(legacy_rates); i++) { >> if (rate == legacy_rates[i]) >> return i; >> } >> >> ath10k_warn(ar, "Invalid legacy rate %hhd peer stats", rate); >> return -EINVAL; >> } >> >> Thanks >> -- >> Gustavo >> >>> Thanks, >>> Ben >>> >>>> >>>> Addresses-Coverity-ID: 1473914 ("Unsigned compared against 0") >>>> Fixes: 0189dbd71cbd ("ath10k: get the legacy rate index to update >>>> the txrate table") >>>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> >>>> --- >>>> drivers/net/wireless/ath/ath10k/htt_rx.c | 3 ++- >>>> 1 file changed, 2 insertions(+), 1 deletion(-) >>>> >>>> diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c >>>> b/drivers/net/wireless/ath/ath10k/htt_rx.c >>>> index f240525..edd0e74 100644 >>>> --- a/drivers/net/wireless/ath/ath10k/htt_rx.c >>>> +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c >>>> @@ -2753,7 +2753,8 @@ ath10k_update_per_peer_tx_stats(struct ath10k >>>> *ar, >>>> struct ath10k_per_peer_tx_stats *peer_stats) >>>> { >>>> struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; >>>> - u8 rate = 0, rate_idx = 0, sgi; >>>> + u8 rate = 0, sgi; >>>> + s8 rate_idx = 0; >>>> struct rate_info txrate; >>>> >>>> lockdep_assert_held(&ar->data_lock); >>>> >>> >>> I have sent a patch to address this, https://patchwork.kernel.org/patch/10611943/ Thanks Anil.
> > I have sent a patch to address this, > https://patchwork.kernel.org/patch/10611943/ > That's great. Thanks for letting me know. :) -- Gustavo
"Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote: > Currently, the error handling for the call to function > ath10k_get_legacy_rate_idx() doesn't work because > *rate_idx* is of type u8 (8 bits, unsigned), which > makes it impossible for it to hold a value less > than 0. > > Fix this by changing the type of variable *rate_idx* > to s8 (8 bits, signed). > > Addresses-Coverity-ID: 1473914 ("Unsigned compared against 0") > Fixes: 0189dbd71cbd ("ath10k: get the legacy rate index to update the txrate table") > Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> > Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Patch applied to ath-next branch of ath.git, thanks. 9d9cdbf3f9ed ath10k: htt_rx: fix signedness bug in ath10k_update_per_peer_tx_stats
On 10/13/18 7:23 PM, Kalle Valo wrote: > > Patch applied to ath-next branch of ath.git, thanks. > > 9d9cdbf3f9ed ath10k: htt_rx: fix signedness bug in ath10k_update_per_peer_tx_stats > Thank you, Kalle. -- Gustavo
diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c index f240525..edd0e74 100644 --- a/drivers/net/wireless/ath/ath10k/htt_rx.c +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c @@ -2753,7 +2753,8 @@ ath10k_update_per_peer_tx_stats(struct ath10k *ar, struct ath10k_per_peer_tx_stats *peer_stats) { struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; - u8 rate = 0, rate_idx = 0, sgi; + u8 rate = 0, sgi; + s8 rate_idx = 0; struct rate_info txrate; lockdep_assert_held(&ar->data_lock);
Currently, the error handling for the call to function ath10k_get_legacy_rate_idx() doesn't work because *rate_idx* is of type u8 (8 bits, unsigned), which makes it impossible for it to hold a value less than 0. Fix this by changing the type of variable *rate_idx* to s8 (8 bits, signed). Addresses-Coverity-ID: 1473914 ("Unsigned compared against 0") Fixes: 0189dbd71cbd ("ath10k: get the legacy rate index to update the txrate table") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- drivers/net/wireless/ath/ath10k/htt_rx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)