linux/include
Baisong Zhong 83ddd4cc8f ALSA: seq: fix undefined behavior in bit shift for SNDRV_SEQ_FILTER_USE_EVENT
[ Upstream commit cf59e1e4c7 ]

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/seq/seq_clientmgr.c:509:22
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_seq_deliver_single_event.constprop.21+0x191/0x2f0
 snd_seq_deliver_event+0x1a2/0x350
 snd_seq_kernel_client_dispatch+0x8b/0xb0
 snd_seq_client_notify_subscription+0x72/0xa0
 snd_seq_ioctl_subscribe_port+0x128/0x160
 snd_seq_kernel_client_ctl+0xce/0xf0
 snd_seq_oss_create_client+0x109/0x15b
 alsa_seq_oss_init+0x11c/0x1aa
 do_one_initcall+0x80/0x440
 kernel_init_freeable+0x370/0x3c3
 kernel_init+0x1b/0x190
 ret_from_fork+0x1f/0x30
 </TASK>

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Baisong Zhong <zhongbaisong@huawei.com>
Link: https://lore.kernel.org/r/20221121111630.3119259-1-zhongbaisong@huawei.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-12-31 13:32:14 +01:00
..
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asm-generic 15 hotfixes. 11 marked cc:stable. Only three or four of the latter 2022-12-02 13:39:38 -08:00
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drm drm/ttm: fix undefined behavior in bit shift for TTM_TT_FLAG_PRIV_POPULATED 2022-12-31 13:32:06 +01:00
dt-bindings These are the pin control changes for the v6.1 kernel cycle: 2022-10-11 10:59:59 -07:00
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kunit kunit: declare kunit_assert structs as const 2022-10-07 10:19:18 -06:00
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linux net, proc: Provide PROC_FS=n fallback for proc_create_net_single_write() 2022-12-31 13:32:09 +01:00
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media media fixes for v6.1-rc2 2022-10-22 15:30:15 -07:00
memory
misc
net soreuseport: Fix socket selection for SO_INCOMING_CPU. 2022-12-31 13:32:04 +01:00
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rdma
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scsi SCSI misc on 20221007 2022-10-07 12:33:18 -07:00
soc ARM: at91: pm: avoid soft resetting AC DLL 2022-11-01 12:25:19 +02:00
sound ALSA: pcm: fix undefined behavior in bit shift for SNDRV_PCM_RATE_KNOT 2022-12-31 13:32:14 +01:00
target
trace fscache: Fix oops due to race with cookie_lru and use_cookie 2022-12-07 11:49:18 -08:00
uapi ALSA: seq: fix undefined behavior in bit shift for SNDRV_SEQ_FILTER_USE_EVENT 2022-12-31 13:32:14 +01:00
ufs SCSI misc on 20221007 2022-10-07 12:33:18 -07:00
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