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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2023-03-13 03:49:24 +0300
committerTakashi Iwai <tiwai@suse.de>2023-03-14 19:02:15 +0300
commit9026c0bf233db53b86f74f4c620715e94eb32a09 (patch)
tree9f2063ccbaffbea5ee87d3da68dae7b30cd13ea2
parentc24ff3ec55f08788fb2c404c312f213d9081e1ba (diff)
downloadlinux-9026c0bf233db53b86f74f4c620715e94eb32a09.tar.xz
ALSA: asihpi: check pao in control_message()
control_message() might be called with pao = NULL. Here indicates control_message() as sample. (B) static void control_message(struct hpi_adapter_obj *pao, ...) { ^^^ struct hpi_hw_obj *phw = pao->priv; ... ^^^ } (A) void _HPI_6205(struct hpi_adapter_obj *pao, ...) { ^^^ ... case HPI_OBJ_CONTROL: (B) control_message(pao, phm, phr); break; ^^^ ... } void HPI_6205(...) { ... (A) _HPI_6205(NULL, phm, phr); ... ^^^^ } Therefore, We will get too many warning via cppcheck, like below sound/pci/asihpi/hpi6205.c:238:27: warning: Possible null pointer dereference: pao [nullPointer] struct hpi_hw_obj *phw = pao->priv; ^ sound/pci/asihpi/hpi6205.c:433:13: note: Calling function '_HPI_6205', 1st argument 'NULL' value is 0 _HPI_6205(NULL, phm, phr); ^ sound/pci/asihpi/hpi6205.c:401:20: note: Calling function 'control_message', 1st argument 'pao' value is 0 control_message(pao, phm, phr); ^ Set phr->error like many functions doing, and don't call _HPI_6205() with NULL. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Link: https://lore.kernel.org/r/87ttypeaqz.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/pci/asihpi/hpi6205.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/pci/asihpi/hpi6205.c b/sound/pci/asihpi/hpi6205.c
index 27e11b5f70b9..c7d7eff86727 100644
--- a/sound/pci/asihpi/hpi6205.c
+++ b/sound/pci/asihpi/hpi6205.c
@@ -430,7 +430,7 @@ void HPI_6205(struct hpi_message *phm, struct hpi_response *phr)
pao = hpi_find_adapter(phm->adapter_index);
} else {
/* subsys messages don't address an adapter */
- _HPI_6205(NULL, phm, phr);
+ phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
return;
}