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linux/include/uapi
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Baisong Zhong a69b1faa9b 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>
History 2022-12-31 13:14:11 +01:00
..
asm-generic signal: Deliver SIGTRAP on perf event asynchronously if blocked 2022-06-09 10:22:48 +02:00
drm drm/fourcc: Add packed 10bit YUV 4:2:0 format 2022-12-31 13:14:10 +01:00
linux audit: fix undefined behavior in bit shift for AUDIT_BIT 2022-12-02 17:41:01 +01:00
misc habanalabs: fix resetting args in wait for CS IOCTL 2021-09-29 12:18:48 +03:00
mtd mtd: add OTP (one-time-programmable) erase ioctl 2021-03-28 19:24:54 +02:00
rdma RDMA/mlx5: Don't compare mkey tags in DEVX indirect mkey 2022-10-26 12:35:03 +02:00
scsi scsi: fc: Add EDC ELS definition 2021-08-24 22:56:33 -04:00
sound ALSA: seq: fix undefined behavior in bit shift for SNDRV_SEQ_FILTER_USE_EVENT 2022-12-31 13:14:11 +01:00
video License cleanup: add SPDX license identifier to uapi header files with a license 2017-11-02 11:20:11 +01:00
xen xen/gntdev: gntdev.h: drop a duplicated word 2020-08-03 07:46:42 +02:00
Kbuild kbuild: re-implement Makefile.headersinst without recursion 2019-06-15 19:57:02 +09:00