[RFC][PATCH] ASoC: qcom: q6asm-dai: kCFI fix

[Srinivas Kandagatla]

On 29/05/2020 22:38, John Stultz wrote:
> Fixes the following kCFI crash seen on db845c, caused
> by the function prototypes not matching the callback
> function prototype.
> 
> [   82.585661] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000001
> [   82.595387] Mem abort info:
> [   82.599463]   ESR = 0x96000005
> [   82.602658]   EC = 0x25: DABT (current EL), IL = 32 bits
> [   82.608177]   SET = 0, FnV = 0
> [   82.611829]   EA = 0, S1PTW = 0
> [   82.615369] Data abort info:
> [   82.618751]   ISV = 0, ISS = 0x00000005
> [   82.622641]   CM = 0, WnR = 0
> [   82.625774] user pgtable: 4k pages, 39-bit VAs, pgdp=0000000174259000
> [   82.632292] [0000000000000001] pgd=0000000000000000, pud=0000000000000000
> [   82.639167] Internal error: Oops: 96000005 [#1] PREEMPT SMP
> [   82.644795] Modules linked in: hci_uart btqca xhci_plat_hcd xhci_pci_renesas xhci_pci xhci_hcd wcn36xx wcnss_ctrl wcd934x vctrl_regulator ufs_qcom syscon_reboot_e
> [   82.644927]  qcom_apcs_ipc_mailbox q6asm_dai q6routing q6asm q6afe_dai q6adm q6afe q6core q6dsp_common pm8941_pwrkey pm8916_wdt platform_mhu pinctrl_spmi_mpp pine
> [   82.812982] CPU: 3 PID: 240 Comm: kworker/u16:4 Tainted: G        W         5.6.0-rc7-mainline-00960-g0c34353d11b9-dirty #1
> [   82.824201] Hardware name: Thundercomm Dragonboard 845c (DT)
> [   82.829937] Workqueue: qcom_apr_rx apr_rxwq [apr]
> [   82.834698] pstate: 80c00005 (Nzcv daif +PAN +UAO)
> [   82.839553] pc : __cfi_check_fail+0x4/0x1c [q6asm_dai]
> [   82.844754] lr : __cfi_check+0x3a8/0x3b0 [q6asm_dai]
> [   82.849767] sp : ffffffc0105f3c20
> [   82.853123] x29: ffffffc0105f3c30 x28: 0000000000000020
> [   82.858489] x27: ffffff80f4588400 x26: ffffff80f458ec94
> [   82.863854] x25: ffffff80f458ece8 x24: ffffffe3670c7000
> [   82.869220] x23: ffffff8094bb7b34 x22: ffffffe367137000
> [   82.874585] x21: bd07909b332eada6 x20: 0000000000000001
> [   82.879950] x19: ffffffe36713863c x18: ffffff80f8df4430
> [   82.885316] x17: 0000000000000001 x16: ffffffe39d15e660
> [   82.890681] x15: 0000000000000001 x14: 0000000000000027
> [   82.896047] x13: 0000000000000000 x12: ffffffe39e6465a0
> [   82.901413] x11: 0000000000000051 x10: 000000000000ffff
> [   82.906779] x9 : 000ffffffe366c19 x8 : c3c5f18762d1ceef
> [   82.912145] x7 : 0000000000000000 x6 : ffffffc010877698
> [   82.917511] x5 : ffffffc0105f3c00 x4 : 0000000000000000
> [   82.922877] x3 : 0000000000000000 x2 : 0000000000000001
> [   82.928243] x1 : ffffffe36713863c x0 : 0000000000000001
> [   82.933610] Call trace:
> [   82.936099]  __cfi_check_fail+0x4/0x1c [q6asm_dai]
> [   82.940955]  q6asm_srvc_callback+0x22c/0x618 [q6asm]
> [   82.945973]  apr_rxwq+0x1a8/0x27c [apr]
> [   82.949861]  process_one_work+0x2e8/0x54c
> [   82.953919]  worker_thread+0x27c/0x4d4
> [   82.957715]  kthread+0x144/0x154
> [   82.960985]  ret_from_fork+0x10/0x18
> [   82.964603] Code: a8c37bfd f85f8e5e d65f03c0 b40000a0 (39400008)
> [   82.970762] ---[ end trace 410accb839617143 ]---
> [   82.975429] Kernel panic - not syncing: Fatal exception
> 
> Cc: Patrick Lai <plai at codeaurora.org>
> Cc: Banajit Goswami <bgoswami at codeaurora.org>
> Cc: Liam Girdwood <lgirdwood at gmail.com>
> Cc: Mark Brown <broonie at kernel.org>
> Cc: Jaroslav Kysela <perex at perex.cz>
> Cc: Takashi Iwai <tiwai at suse.com>
> Cc: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>
> Cc: Vinod Koul <vkoul at kernel.org>
> Cc: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
> Cc: Stephan Gerhold <stephan at gerhold.net>
> Cc: Sami Tolvanen <samitolvanen at google.com>
> Cc: Todd Kjos <tkjos at google.com>
> Cc: Alistair Delva <adelva at google.com>
> Cc: Amit Pundir <amit.pundir at linaro.org>
> Cc: Sumit Semwal <sumit.semwal at linaro.org>
> Cc: alsa-devel at alsa-project.org
> Signed-off-by: John Stultz <john.stultz at linaro.org>
> ---
>   sound/soc/qcom/qdsp6/q6asm-dai.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)

Thanks for the Patch!


Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>



> 
> diff --git a/sound/soc/qcom/qdsp6/q6asm-dai.c b/sound/soc/qcom/qdsp6/q6asm-dai.c
> index 125af00bba53..4640804aab7f 100644
> --- a/sound/soc/qcom/qdsp6/q6asm-dai.c
> +++ b/sound/soc/qcom/qdsp6/q6asm-dai.c
> @@ -176,7 +176,7 @@ static const struct snd_compr_codec_caps q6asm_compr_caps = {
>   };
>   
>   static void event_handler(uint32_t opcode, uint32_t token,
> -			  uint32_t *payload, void *priv)
> +			  void *payload, void *priv)
>   {
>   	struct q6asm_dai_rtd *prtd = priv;
>   	struct snd_pcm_substream *substream = prtd->substream;
> @@ -490,7 +490,7 @@ static int q6asm_dai_hw_params(struct snd_soc_component *component,
>   }
>   
>   static void compress_event_handler(uint32_t opcode, uint32_t token,
> -				   uint32_t *payload, void *priv)
> +				   void *payload, void *priv)
>   {
>   	struct q6asm_dai_rtd *prtd = priv;
>   	struct snd_compr_stream *substream = prtd->cstream;
>