Unverified Commit 565cf970 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!15128 ALSA: seq: oss: Fix races at processing SysEx messages 

Merge Pull Request from: @ci-robot 
 
PR sync from: Gu Bowen <gubowen5@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/INYCKZDB4DQPDNSNPGC3YTBFLWDUMZTC/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBID2T 
 
Link:https://gitee.com/openeuler/kernel/pulls/15128

 

Reviewed-by: default avatarZhang Peng <zhangpeng362@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents 4c02bc5f 07460bed

sound/core/seq/oss/seq_oss_synth.c

+2 −0
Original line number Diff line number Diff line
@@ -66,6 +66,7 @@ static struct seq_oss_synth midi_synth_dev = { 
};



static DEFINE_SPINLOCK(register_lock);

static DEFINE_MUTEX(sysex_mutex);



/*

 * prototypes
@@ -497,6 +498,7 @@ snd_seq_oss_synth_sysex(struct seq_oss_devinfo *dp, int dev, unsigned char *buf, 
	if (!info)

		return -ENXIO;



	guard(mutex)(&sysex_mutex);

	sysex = info->sysex;

	if (sysex == NULL) {

		sysex = kzalloc(sizeof(*sysex), GFP_KERNEL);