在 2022/11/21 18:35, Takashi Iwai 写道:
On Mon, 21 Nov 2022 03:33:29 +0100,
Baisong Zhong wrote:
Shifting signed 32-bit value by 31 bits is undefined, so changing
significant bit to unsigned. The UBSAN warning calltrace like below:
UBSAN: shift-out-of-bounds in sound/core/pcm_native.c:2676:21
left shift of 1 by 31 places cannot be represented in type 'int'
...
Call Trace:
<TASK>
dump_stack_lvl+0x8d/0xcf
ubsan_epilogue+0xa/0x44
__ubsan_handle_shift_out_of_bounds+0x1e7/0x208
snd_pcm_open_substream+0x9f0/0xa90
snd_pcm_oss_open.part.26+0x313/0x670
snd_pcm_oss_open+0x30/0x40
soundcore_open+0x18b/0x2e0
chrdev_open+0xe2/0x270
do_dentry_open+0x2f7/0x620
path_openat+0xd66/0xe70
do_filp_open+0xe3/0x170
do_sys_openat2+0x357/0x4a0
do_sys_open+0x87/0xd0
do_syscall_64+0x34/0x80
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Baisong Zhong <zhongbaisong@xxxxxxxxxx>
---
include/sound/pcm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 7b1a022910e8..ec28c2ec89de 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -123,7 +123,7 @@ struct snd_pcm_ops {
#define SNDRV_PCM_RATE_384000 (1<<14) /* 384000Hz */
#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
-#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
+#define SNDRV_PCM_RATE_KNOT (1U<<31) /* supports more non-continuos rates */
Could you rather update all SNDRV_PCM_RATE_* to 1U?
Otherwise it'll look inconsistent.
thanks,
Takashi
Hi, Takashi
Thank you for your suggestion. I will update all
SNDRV_PCM_RATE_* to 1U for consistency in v2.
Baisong Zhong
.
