* Re: [kvalo-ath:pending 52/56] drivers/net/wireless/ath/ath11k/wmi.c:5651 ath11k_wmi_tlv_fw_stats_data_parse() error: uninitialized symbol 'len'.
[not found] <202112110427.o6xDAKfE-lkp@intel.com>
@ 2022-01-11 13:35 ` Kalle Valo
2022-01-11 13:58 ` Dan Carpenter
0 siblings, 1 reply; 3+ messages in thread
From: Kalle Valo @ 2022-01-11 13:35 UTC (permalink / raw)
To: Dan Carpenter; +Cc: kbuild, Wen Gong, lkp, kbuild-all, ath11k, linux-kernel
(moving from ath10k list to ath11k list)
Dan Carpenter <dan.carpenter@oracle.com> writes:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git pending
> head: 34cbb4043dca455fca888e1ced323e588912b6a2
> commit: bc5c448b70ff141f8a2b5cbbab79fba08d7a1be0 [52/56] ath11k:
> report rssi of each chain to mac80211 for QCA6390/WCN6855
> config: riscv-randconfig-m031-20211210
> (https://download.01.org/0day-ci/archive/20211211/202112110427.o6xDAKfE-lkp@intel.com/config)
> compiler: riscv64-linux-gcc (GCC) 11.2.0
This was a test commit in the pending branch, I applied the actual
commit as:
b488c766442f ath11k: report rssi of each chain to mac80211 for QCA6390/WCN6855
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
>
> New smatch warnings:
> drivers/net/wireless/ath/ath11k/wmi.c:5651
> ath11k_wmi_tlv_fw_stats_data_parse() error: uninitialized symbol
> 'len'.
>
> Old smatch warnings:
> arch/riscv/include/asm/atomic.h:317 arch_atomic_sub_if_positive()
> warn: inconsistent indenting
> drivers/net/wireless/ath/ath11k/wmi.c:5674
> ath11k_wmi_tlv_fw_stats_data_parse() error: uninitialized symbol
> 'len'.
> drivers/net/wireless/ath/ath11k/wmi.c:5695
> ath11k_wmi_tlv_fw_stats_data_parse() error: uninitialized symbol
> 'len'.
>
> vim +/len +5651 drivers/net/wireless/ath/ath11k/wmi.c
>
> bc5c448b70ff14 Wen Gong 2021-12-08 5629 static int
> ath11k_wmi_tlv_fw_stats_data_parse(struct ath11k_base *ab,
> bc5c448b70ff14 Wen Gong 2021-12-08 5630 struct wmi_tlv_fw_stats_parse
> *parse,
> bc5c448b70ff14 Wen Gong 2021-12-08 5631 const void *ptr)
> bc5c448b70ff14 Wen Gong 2021-12-08 5632 {
> bc5c448b70ff14 Wen Gong 2021-12-08 5633 struct ath11k_fw_stats *stats
> = parse->stats;
> bc5c448b70ff14 Wen Gong 2021-12-08 5634 const struct wmi_stats_event
> *ev = parse->ev;
> bc5c448b70ff14 Wen Gong 2021-12-08 5635 int i;
> bc5c448b70ff14 Wen Gong 2021-12-08 5636 const void *data = ptr;
> bc5c448b70ff14 Wen Gong 2021-12-08 5637 u32 len;
> bc5c448b70ff14 Wen Gong 2021-12-08 5638
> bc5c448b70ff14 Wen Gong 2021-12-08 5639 if (!ev) {
> bc5c448b70ff14 Wen Gong 2021-12-08 5640 ath11k_warn(ab, "failed to
> fetch update stats ev");
> bc5c448b70ff14 Wen Gong 2021-12-08 5641 return -EPROTO;
> bc5c448b70ff14 Wen Gong 2021-12-08 5642 }
> d5c65159f28953 Kalle Valo 2019-11-23 5643
> d5c65159f28953 Kalle Valo 2019-11-23 5644 stats->stats_id = 0;
> d5c65159f28953 Kalle Valo 2019-11-23 5645
> d5c65159f28953 Kalle Valo 2019-11-23 5646 for (i = 0; i <
> ev->num_pdev_stats; i++) {
> d5c65159f28953 Kalle Valo 2019-11-23 5647 const struct wmi_pdev_stats
> *src;
> d5c65159f28953 Kalle Valo 2019-11-23 5648 struct ath11k_fw_stats_pdev
> *dst;
> d5c65159f28953 Kalle Valo 2019-11-23 5649
> d5c65159f28953 Kalle Valo 2019-11-23 5650 src = data;
> bc5c448b70ff14 Wen Gong 2021-12-08 @5651 if (len < sizeof(*src))
>
> "len" is never initialized.
I only quickly looked at this, but AFAICS ath11k_wmi_tlv_iter() provides
len to ath11k_wmi_tlv_fw_stats_parse() which again provides len to
ath11k_wmi_tlv_fw_stats_data_parse(). I'm not seeing how this is
uninitalised, did I miss something?
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [kvalo-ath:pending 52/56] drivers/net/wireless/ath/ath11k/wmi.c:5651 ath11k_wmi_tlv_fw_stats_data_parse() error: uninitialized symbol 'len'.
2022-01-11 13:35 ` [kvalo-ath:pending 52/56] drivers/net/wireless/ath/ath11k/wmi.c:5651 ath11k_wmi_tlv_fw_stats_data_parse() error: uninitialized symbol 'len' Kalle Valo
@ 2022-01-11 13:58 ` Dan Carpenter
2022-01-11 14:26 ` Kalle Valo
0 siblings, 1 reply; 3+ messages in thread
From: Dan Carpenter @ 2022-01-11 13:58 UTC (permalink / raw)
To: Kalle Valo; +Cc: kbuild, Wen Gong, lkp, kbuild-all, ath11k, linux-kernel
On Tue, Jan 11, 2022 at 03:35:26PM +0200, Kalle Valo wrote:
> > bc5c448b70ff14 Wen Gong 2021-12-08 5629 static int
> > ath11k_wmi_tlv_fw_stats_data_parse(struct ath11k_base *ab,
> > bc5c448b70ff14 Wen Gong 2021-12-08 5630 struct wmi_tlv_fw_stats_parse
> > *parse,
> > bc5c448b70ff14 Wen Gong 2021-12-08 5631 const void *ptr)
> > bc5c448b70ff14 Wen Gong 2021-12-08 5632 {
> > bc5c448b70ff14 Wen Gong 2021-12-08 5633 struct ath11k_fw_stats *stats
> > = parse->stats;
> > bc5c448b70ff14 Wen Gong 2021-12-08 5634 const struct wmi_stats_event
> > *ev = parse->ev;
> > bc5c448b70ff14 Wen Gong 2021-12-08 5635 int i;
> > bc5c448b70ff14 Wen Gong 2021-12-08 5636 const void *data = ptr;
> > bc5c448b70ff14 Wen Gong 2021-12-08 5637 u32 len;
^^^^^^^^
"len" is a local variable, not a parameter.
> > bc5c448b70ff14 Wen Gong 2021-12-08 5638
> > bc5c448b70ff14 Wen Gong 2021-12-08 5639 if (!ev) {
> > bc5c448b70ff14 Wen Gong 2021-12-08 5640 ath11k_warn(ab, "failed to
> > fetch update stats ev");
> > bc5c448b70ff14 Wen Gong 2021-12-08 5641 return -EPROTO;
> > bc5c448b70ff14 Wen Gong 2021-12-08 5642 }
> > d5c65159f28953 Kalle Valo 2019-11-23 5643
> > d5c65159f28953 Kalle Valo 2019-11-23 5644 stats->stats_id = 0;
> > d5c65159f28953 Kalle Valo 2019-11-23 5645
> > d5c65159f28953 Kalle Valo 2019-11-23 5646 for (i = 0; i <
> > ev->num_pdev_stats; i++) {
> > d5c65159f28953 Kalle Valo 2019-11-23 5647 const struct wmi_pdev_stats
> > *src;
> > d5c65159f28953 Kalle Valo 2019-11-23 5648 struct ath11k_fw_stats_pdev
> > *dst;
> > d5c65159f28953 Kalle Valo 2019-11-23 5649
> > d5c65159f28953 Kalle Valo 2019-11-23 5650 src = data;
> > bc5c448b70ff14 Wen Gong 2021-12-08 @5651 if (len < sizeof(*src))
> >
> > "len" is never initialized.
>
> I only quickly looked at this, but AFAICS ath11k_wmi_tlv_iter() provides
> len to ath11k_wmi_tlv_fw_stats_parse() which again provides len to
> ath11k_wmi_tlv_fw_stats_data_parse(). I'm not seeing how this is
> uninitalised, did I miss something?
I think the bug was fixed and the tree was rebased? I only look at the
email and hit forward and the code in the email was clearly buggy but
tree looks okay now as you say.
regards,
dan carpenter
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [kvalo-ath:pending 52/56] drivers/net/wireless/ath/ath11k/wmi.c:5651 ath11k_wmi_tlv_fw_stats_data_parse() error: uninitialized symbol 'len'.
2022-01-11 13:58 ` Dan Carpenter
@ 2022-01-11 14:26 ` Kalle Valo
0 siblings, 0 replies; 3+ messages in thread
From: Kalle Valo @ 2022-01-11 14:26 UTC (permalink / raw)
To: Dan Carpenter; +Cc: kbuild, Wen Gong, lkp, kbuild-all, ath11k, linux-kernel
Dan Carpenter <dan.carpenter@oracle.com> writes:
> On Tue, Jan 11, 2022 at 03:35:26PM +0200, Kalle Valo wrote:
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5629 static int
>> > ath11k_wmi_tlv_fw_stats_data_parse(struct ath11k_base *ab,
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5630 struct wmi_tlv_fw_stats_parse
>> > *parse,
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5631 const void *ptr)
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5632 {
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5633 struct ath11k_fw_stats *stats
>> > = parse->stats;
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5634 const struct wmi_stats_event
>> > *ev = parse->ev;
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5635 int i;
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5636 const void *data = ptr;
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5637 u32 len;
> ^^^^^^^^
> "len" is a local variable, not a parameter.
Ah, I only looked at the current ath-next branch.
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5638
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5639 if (!ev) {
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5640 ath11k_warn(ab, "failed to
>> > fetch update stats ev");
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5641 return -EPROTO;
>> > bc5c448b70ff14 Wen Gong 2021-12-08 5642 }
>> > d5c65159f28953 Kalle Valo 2019-11-23 5643
>> > d5c65159f28953 Kalle Valo 2019-11-23 5644 stats->stats_id = 0;
>> > d5c65159f28953 Kalle Valo 2019-11-23 5645
>> > d5c65159f28953 Kalle Valo 2019-11-23 5646 for (i = 0; i <
>> > ev->num_pdev_stats; i++) {
>> > d5c65159f28953 Kalle Valo 2019-11-23 5647 const struct wmi_pdev_stats
>> > *src;
>> > d5c65159f28953 Kalle Valo 2019-11-23 5648 struct ath11k_fw_stats_pdev
>> > *dst;
>> > d5c65159f28953 Kalle Valo 2019-11-23 5649
>> > d5c65159f28953 Kalle Valo 2019-11-23 5650 src = data;
>> > bc5c448b70ff14 Wen Gong 2021-12-08 @5651 if (len < sizeof(*src))
>> >
>> > "len" is never initialized.
>>
>> I only quickly looked at this, but AFAICS ath11k_wmi_tlv_iter() provides
>> len to ath11k_wmi_tlv_fw_stats_parse() which again provides len to
>> ath11k_wmi_tlv_fw_stats_data_parse(). I'm not seeing how this is
>> uninitalised, did I miss something?
>
> I think the bug was fixed and the tree was rebased?
Most likely there were some changes, but I can't remember anymore. Too
many patches :)
> I only look at the email and hit forward and the code in the email was
> clearly buggy but tree looks okay now as you say.
Good, thanks for checking.
--
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https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
--
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2022-01-11 13:35 ` [kvalo-ath:pending 52/56] drivers/net/wireless/ath/ath11k/wmi.c:5651 ath11k_wmi_tlv_fw_stats_data_parse() error: uninitialized symbol 'len' Kalle Valo
2022-01-11 13:58 ` Dan Carpenter
2022-01-11 14:26 ` Kalle Valo
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