[PATCH -next] ALSA: pcm: fix undefined behavior in bit shift for SNDRV_PCM_RATE_KNOT
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@huawei.com --- 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 */
#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
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@huawei.com
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
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@huawei.com
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 .
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