* Re: [RFH] wireless-next: fix new W=1 warnings
[not found] <87fs2k5l1a.fsf@kernel.org>
@ 2023-10-09 9:07 ` Bagas Sanjaya
2023-10-17 15:53 ` [PATCH] wifi: ath11k: fix -Wformat-truncation warning Dmitry Antipov
1 sibling, 0 replies; 3+ messages in thread
From: Bagas Sanjaya @ 2023-10-09 9:07 UTC (permalink / raw)
To: Kalle Valo, Linux Wireless, Linux Kernel Mailing List,
Linux Networking, Linux Broadcom Wireless Development,
SHA-cyfmac-dev-list, Linux ath11k
Cc: Stanislav Yakovlev, Gregory Greenman, Arend van Spriel,
Franky Lin, Hante Meuleman, Jeff Johnson,
Toke Høiland-Jørgensen, Richard Cochran, Johannes Berg,
Miri Korenblit, Avraham Stern, Benjamin Berg, Mordechay Goodstein,
Minsuk Kang, Ruan Jinjie
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On Mon, Oct 09, 2023 at 10:09:53AM +0300, Kalle Valo wrote:
> Hi,
>
> During the weekend we updated wireless-next tree from v6.5 to v6.6-rc4+.
> It looks like a new warning was enabled for v6.6 as I see with GCC 13.2
> and W=1 several warnings (list below). In v6.5 wireless code was still
> W=1 warning free with GCC.
Can you pin-point the exact commit that introduces the warnings?
>
> For wireless we get lots of questionable cleanup patches. But actually
> these kind of warnings are what we would prefer to be fixed instead of
> the random churn we always see. Hence I'm sending this Request For Help
> (RFH) in case the cleanup people would fix these. Is there a mailing
> list I should send this to?
[also Cc: maintainers and lists for files below]
>
> The sooner these are fixed the better, it makes it difficult for us to
> see any new warnings from this noise.
>
> Kalle
>
> drivers/net/wireless/intel/ipw2x00/ipw2100.c:5905:63: warning: '%s' directive output may be truncated writing up to 63 bytes into a region of size 32 [-Wformat-truncation=]
> drivers/net/wireless/intel/ipw2x00/ipw2100.c:5905:9: note: 'snprintf' output between 4 and 140 bytes into a destination of size 32
> drivers/net/wireless/intel/ipw2x00/ipw2200.c:10392:63: warning: '%s' directive output may be truncated writing up to 63 bytes into a region of size 32 [-Wformat-truncation=]
> drivers/net/wireless/intel/ipw2x00/ipw2200.c:10392:9: note: 'snprintf' output between 4 and 98 bytes into a destination of size 32
> drivers/net/wireless/intel/iwlwifi/dvm/main.c:1467:19: warning: '%s' directive output may be truncated writing up to 63 bytes into a region of size 32 [-Wformat-truncation=]
> drivers/net/wireless/intel/iwlwifi/dvm/main.c:1465:9: note: 'snprintf' output between 1 and 64 bytes into a destination of size 32
> drivers/net/wireless/intel/iwlwifi/mvm/ops.c:1307:19: warning: '%s' directive output may be truncated writing up to 63 bytes into a region of size 32 [-Wformat-truncation=]
> drivers/net/wireless/intel/iwlwifi/mvm/ops.c:1305:9: note: 'snprintf' output between 1 and 64 bytes into a destination of size 32
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:262:52: warning: '%d' directive output may be truncated writing between 1 and 5 bytes into a region of size 4 [-Wformat-truncation=]
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:262:46: note: directive argument in the range [0, 65535]
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:262:46: note: directive argument in the range [0, 65535]
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:262:9: note: 'snprintf' output between 9 and 17 bytes into a destination of size 9
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:265:55: warning: '%d' directive output may be truncated writing between 1 and 5 bytes into a region of size 4 [-Wformat-truncation=]
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:265:48: note: directive argument in the range [0, 65535]
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:265:48: note: directive argument in the range [0, 65535]
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:265:9: note: 'snprintf' output between 10 and 18 bytes into a destination of size 10
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:342:50: warning: '/' directive output may be truncated writing 1 byte into a region of size between 0 and 4 [-Wformat-truncation=]
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:342:42: note: directive argument in the range [0, 65535]
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c:342:9: note: 'snprintf' output between 10 and 18 bytes into a destination of size 10
> drivers/net/wireless/intel/iwlwifi/iwl-drv.c:549:33: warning: '%s' directive output may be truncated writing up to 63 bytes into a region of size between 48 and 56 [-Wformat-truncation=]
> drivers/net/wireless/intel/iwlwifi/iwl-drv.c:547:9: note: 'snprintf' output 9 or more bytes (assuming 80) into a destination of size 64
> drivers/net/wireless/intel/iwlwifi/iwl-drv.c:729:33: warning: '%s' directive output may be truncated writing up to 63 bytes into a region of size between 48 and 56 [-Wformat-truncation=]
> drivers/net/wireless/intel/iwlwifi/iwl-drv.c:727:9: note: 'snprintf' output 9 or more bytes (assuming 80) into a destination of size 64
> drivers/net/wireless/intel/iwlwifi/iwl-drv.c:989:51: warning: '%s' directive output may be truncated writing up to 63 bytes into a region of size between 46 and 58 [-Wformat-truncation=]
> drivers/net/wireless/intel/iwlwifi/iwl-drv.c:987:33: note: 'snprintf' output between 7 and 82 bytes into a destination of size 64
> drivers/net/wireless/intel/iwlwifi/iwl-drv.c:984:53: warning: '%s' directive output may be truncated writing up to 63 bytes into a region of size between 40 and 50 [-Wformat-truncation=]
> drivers/net/wireless/intel/iwlwifi/iwl-drv.c:982:33: note: 'snprintf' output between 15 and 88 bytes into a destination of size 64
> drivers/net/wireless/ath/ath11k/debugfs.c:1597:51: warning: '%d' directive output may be truncated writing between 1 and 3 bytes into a region of size 2 [-Wformat-truncation=]
> drivers/net/wireless/ath/ath11k/debugfs.c:1597:48: note: directive argument in the range [0, 255]
> drivers/net/wireless/ath/ath11k/debugfs.c:1597:9: note: 'snprintf' output between 5 and 7 bytes into a destination of size 5
> drivers/net/wireless/ath/ath9k/hif_usb.c:1223:42: warning: '.0.fw' directive output may be truncated writing 5 bytes into a region of size between 4 and 11 [-Wformat-truncation=]
> drivers/net/wireless/ath/ath9k/hif_usb.c:1222:17: note: 'snprintf' output between 27 and 34 bytes into a destination of size 32
There is only one commit touching above files in current cycle, that is b2fd72aafb1311 ("wifi: ath9k: Remove unnecessary ternary operators").
That's what I know.
--
An old man doll... just what I always wanted! - Clara
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^ permalink raw reply [flat|nested] 3+ messages in thread* [PATCH] wifi: ath11k: fix -Wformat-truncation warning
[not found] <87fs2k5l1a.fsf@kernel.org>
2023-10-09 9:07 ` [RFH] wireless-next: fix new W=1 warnings Bagas Sanjaya
@ 2023-10-17 15:53 ` Dmitry Antipov
2023-10-17 19:38 ` Jeff Johnson
1 sibling, 1 reply; 3+ messages in thread
From: Dmitry Antipov @ 2023-10-17 15:53 UTC (permalink / raw)
To: Jeff Johnson; +Cc: Kalle Valo, ath11k, linux-wireless, Dmitry Antipov
Fix the following warning observed with GCC 13.2 and -Wformat-truncation:
drivers/net/wireless/ath/ath11k/debugfs.c: In function ‘ath11k_debugfs_register’:
drivers/net/wireless/ath/ath11k/debugfs.c:1597:51: warning: ‘%d’ directive output
may be truncated writing between 1 and 3 bytes into a region of size 2 [-Wformat-truncation=]
1597 | snprintf(pdev_name, sizeof(pdev_name), "%s%d", "mac", ar->pdev_idx);
| ^~
drivers/net/wireless/ath/ath11k/debugfs.c:1597:48: note: directive argument in the range [0, 255]
1597 | snprintf(pdev_name, sizeof(pdev_name), "%s%d", "mac", ar->pdev_idx);
| ^~~~~~
drivers/net/wireless/ath/ath11k/debugfs.c:1597:9: note: ‘snprintf’ output between
5 and 7 bytes into a destination of size 5
1597 | snprintf(pdev_name, sizeof(pdev_name), "%s%d", "mac", ar->pdev_idx);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Simplify the 'snprintf()' statement as well.
Suggested-by: Kalle Valo <kvalo@kernel.org>
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
---
drivers/net/wireless/ath/ath11k/debugfs.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath11k/debugfs.c b/drivers/net/wireless/ath/ath11k/debugfs.c
index 5bb6fd17fdf6..e9b05e7c189b 100644
--- a/drivers/net/wireless/ath/ath11k/debugfs.c
+++ b/drivers/net/wireless/ath/ath11k/debugfs.c
@@ -1591,10 +1591,10 @@ static const struct file_operations fops_ps_state_enable = {
int ath11k_debugfs_register(struct ath11k *ar)
{
struct ath11k_base *ab = ar->ab;
- char pdev_name[5];
+ char pdev_name[8];
char buf[100] = {0};
- snprintf(pdev_name, sizeof(pdev_name), "%s%d", "mac", ar->pdev_idx);
+ snprintf(pdev_name, sizeof(pdev_name), "mac%u", ar->pdev_idx);
ar->debug.debugfs_pdev = debugfs_create_dir(pdev_name, ab->debugfs_soc);
if (IS_ERR(ar->debug.debugfs_pdev))
--
2.41.0
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