From 78977fd5b11cc90668c0dec6109d2f6572c9601c Mon Sep 17 00:00:00 2001 From: Xiaoke Wang Date: Mon, 13 Dec 2021 18:52:32 +0800 Subject: [PATCH] ALSA: sound/isa/gus: check the return value of kstrdup() kstrdup() returns NULL when some internal memory errors happen, it is better to check the return value of it. Otherwise, we may not to be able to catch some memory errors in time. Signed-off-by: Xiaoke Wang Link: https://lore.kernel.org/r/tencent_1E3950293AC22395ACFE99404C985D738309@qq.com Signed-off-by: Takashi Iwai --- sound/isa/gus/gus_mem.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/sound/isa/gus/gus_mem.c b/sound/isa/gus/gus_mem.c index ff9480f249fe..4c691dbf2721 100644 --- a/sound/isa/gus/gus_mem.c +++ b/sound/isa/gus/gus_mem.c @@ -199,6 +199,10 @@ struct snd_gf1_mem_block *snd_gf1_mem_alloc(struct snd_gf1_mem * alloc, int owne memcpy(&block.share_id, share_id, sizeof(block.share_id)); block.owner = owner; block.name = kstrdup(name, GFP_KERNEL); + if (block.name == NULL) { + snd_gf1_mem_lock(alloc, 1); + return NULL; + } nblock = snd_gf1_mem_xalloc(alloc, &block); snd_gf1_mem_lock(alloc, 1); return nblock; @@ -237,13 +241,13 @@ int snd_gf1_mem_init(struct snd_gus_card * gus) block.ptr = 0; block.size = 1024; block.name = kstrdup("InterWave LFOs", GFP_KERNEL); - if (snd_gf1_mem_xalloc(alloc, &block) == NULL) + if (block.name == NULL || snd_gf1_mem_xalloc(alloc, &block) == NULL) return -ENOMEM; } block.ptr = gus->gf1.default_voice_address; block.size = 4; block.name = kstrdup("Voice default (NULL's)", GFP_KERNEL); - if (snd_gf1_mem_xalloc(alloc, &block) == NULL) + if (block.name == NULL || snd_gf1_mem_xalloc(alloc, &block) == NULL) return -ENOMEM; #ifdef CONFIG_SND_DEBUG snd_card_ro_proc_new(gus->card, "gusmem", gus, snd_gf1_mem_info_read);