This is a note to let you know that I've just added the patch titled
ALSA: pcm: fix undefined behavior in bit shift for SNDRV_PCM_RATE_KNOT
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-pcm-fix-undefined-behavior-in-bit-shift-for-snd.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2f270a8d7d9384e3992ade0fd108bdf2f418c8b3
Author: Baisong Zhong <zhongbaisong@xxxxxxxxxx>
Date: Mon Nov 21 19:00:44 2022 +0800
ALSA: pcm: fix undefined behavior in bit shift for SNDRV_PCM_RATE_KNOT
[ Upstream commit b5172e62458f8e6ff359e5f096044a488db90ac5 ]
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>
Link: https://lore.kernel.org/r/20221121110044.3115686-1-zhongbaisong@xxxxxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index f0045f842a60..299e35458863 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -104,24 +104,24 @@ struct snd_pcm_ops {
#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
/* If you change this don't forget to change rates[] table in pcm_native.c */
-#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
-#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
-#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
-#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
-#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
-#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
-#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
-#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
-#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
-#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
-#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
-#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
-#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
-#define SNDRV_PCM_RATE_352800 (1<<13) /* 352800Hz */
-#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_5512 (1U<<0) /* 5512Hz */
+#define SNDRV_PCM_RATE_8000 (1U<<1) /* 8000Hz */
+#define SNDRV_PCM_RATE_11025 (1U<<2) /* 11025Hz */
+#define SNDRV_PCM_RATE_16000 (1U<<3) /* 16000Hz */
+#define SNDRV_PCM_RATE_22050 (1U<<4) /* 22050Hz */
+#define SNDRV_PCM_RATE_32000 (1U<<5) /* 32000Hz */
+#define SNDRV_PCM_RATE_44100 (1U<<6) /* 44100Hz */
+#define SNDRV_PCM_RATE_48000 (1U<<7) /* 48000Hz */
+#define SNDRV_PCM_RATE_64000 (1U<<8) /* 64000Hz */
+#define SNDRV_PCM_RATE_88200 (1U<<9) /* 88200Hz */
+#define SNDRV_PCM_RATE_96000 (1U<<10) /* 96000Hz */
+#define SNDRV_PCM_RATE_176400 (1U<<11) /* 176400Hz */
+#define SNDRV_PCM_RATE_192000 (1U<<12) /* 192000Hz */
+#define SNDRV_PCM_RATE_352800 (1U<<13) /* 352800Hz */
+#define SNDRV_PCM_RATE_384000 (1U<<14) /* 384000Hz */
+
+#define SNDRV_PCM_RATE_CONTINUOUS (1U<<30) /* continuous range */
+#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|\
