diff mbox series

[RESEND,06/11] brcmfmac: sdio: Fix undefined behavior due to shift overflowing the constant

Message ID Ykx0iRlvtBnKqtbG@zn.tnic (mailing list archive)
State Accepted
Commit 6fb3a5868b2117611f41e421e10e6a8c2a13039a
Delegated to: Kalle Valo
Headers show
Series None | expand

Commit Message

Borislav Petkov April 5, 2022, 4:55 p.m. UTC
Fix:

  drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c: In function ‘brcmf_sdio_drivestrengthinit’:
  drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:3798:2: error: case label does not reduce to an integer constant
    case SDIOD_DRVSTR_KEY(BRCM_CC_43143_CHIP_ID, 17):
    ^~~~
  drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:3809:2: error: case label does not reduce to an integer constant
    case SDIOD_DRVSTR_KEY(BRCM_CC_43362_CHIP_ID, 13):
    ^~~~

See https://lore.kernel.org/r/YkwQ6%2BtIH8GQpuct@zn.tnic for the gory
details as to why it triggers with older gccs only.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Arend van Spriel <aspriel@gmail.com>
Cc: Franky Lin <franky.lin@broadcom.com>
Cc: Hante Meuleman <hante.meuleman@broadcom.com>
Cc: Kalle Valo <kvalo@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: brcm80211-dev-list.pdl@broadcom.com
Cc: netdev@vger.kernel.org
---

Resend, this time with linux-wireless on Cc so that patchwork can pick
it up.

Thx.

 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Arend Van Spriel April 5, 2022, 7:11 p.m. UTC | #1
On 4/5/2022 6:55 PM, Borislav Petkov wrote:
> Fix:
> 
>    drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c: In function ‘brcmf_sdio_drivestrengthinit’:
>    drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:3798:2: error: case label does not reduce to an integer constant
>      case SDIOD_DRVSTR_KEY(BRCM_CC_43143_CHIP_ID, 17):
>      ^~~~
>    drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:3809:2: error: case label does not reduce to an integer constant
>      case SDIOD_DRVSTR_KEY(BRCM_CC_43362_CHIP_ID, 13):
>      ^~~~
> 
> See https://lore.kernel.org/r/YkwQ6%2BtIH8GQpuct@zn.tnic for the gory
> details as to why it triggers with older gccs only.

The details aren't that gory ;-)

Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
> Signed-off-by: Borislav Petkov <bp@suse.de>
> Cc: Arend van Spriel <aspriel@gmail.com>
> Cc: Franky Lin <franky.lin@broadcom.com>
> Cc: Hante Meuleman <hante.meuleman@broadcom.com>
> Cc: Kalle Valo <kvalo@kernel.org>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: brcm80211-dev-list.pdl@broadcom.com
> Cc: netdev@vger.kernel.org
Kalle Valo April 10, 2022, 12:20 p.m. UTC | #2
Borislav Petkov <bp@alien8.de> wrote:

> Fix:
> 
>   drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c: In function ‘brcmf_sdio_drivestrengthinit’:
>   drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:3798:2: error: case label does not reduce to an integer constant
>     case SDIOD_DRVSTR_KEY(BRCM_CC_43143_CHIP_ID, 17):
>     ^~~~
>   drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:3809:2: error: case label does not reduce to an integer constant
>     case SDIOD_DRVSTR_KEY(BRCM_CC_43362_CHIP_ID, 13):
>     ^~~~
> 
> See https://lore.kernel.org/r/YkwQ6%2BtIH8GQpuct@zn.tnic for the gory
> details as to why it triggers with older gccs only.
> 
> Signed-off-by: Borislav Petkov <bp@suse.de>
> Cc: Arend van Spriel <aspriel@gmail.com>
> Cc: Franky Lin <franky.lin@broadcom.com>
> Cc: Hante Meuleman <hante.meuleman@broadcom.com>
> Cc: Kalle Valo <kvalo@kernel.org>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: brcm80211-dev-list.pdl@broadcom.com
> Cc: netdev@vger.kernel.org
> Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>

Patch applied to wireless.git, thanks.

6fb3a5868b21 brcmfmac: sdio: Fix undefined behavior due to shift overflowing the constant
diff mbox series

Patch

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index ba3c159111d3..d78ccc223709 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -557,7 +557,7 @@  enum brcmf_sdio_frmtype {
 	BRCMF_SDIO_FT_SUB,
 };
 
-#define SDIOD_DRVSTR_KEY(chip, pmu)     (((chip) << 16) | (pmu))
+#define SDIOD_DRVSTR_KEY(chip, pmu)     (((unsigned int)(chip) << 16) | (pmu))
 
 /* SDIO Pad drive strength to select value mappings */
 struct sdiod_drive_str {