When snd_gf1_mem_xalloc() returns NULL, the current code still leaves the formerly allocated block.name string but returns an error immediately. This patch does code-refactoring to move the kstrdup() call itself into snd_gf1_mem_xalloc() and deals with the resource free in the helper code by itself for fixing those memory leaks. Suggested-by: Jaroslav Kysela <perex@xxxxxxxx> Link: https://lore.kernel.org/r/20211213132444.22385-2-tiwai@xxxxxxx Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> --- sound/isa/gus/gus_mem.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/sound/isa/gus/gus_mem.c b/sound/isa/gus/gus_mem.c index 5e3ff3137dd7..3e56c01c4544 100644 --- a/sound/isa/gus/gus_mem.c +++ b/sound/isa/gus/gus_mem.c @@ -24,8 +24,9 @@ void snd_gf1_mem_lock(struct snd_gf1_mem * alloc, int xup) } } -static struct snd_gf1_mem_block *snd_gf1_mem_xalloc(struct snd_gf1_mem * alloc, - struct snd_gf1_mem_block * block) +static struct snd_gf1_mem_block * +snd_gf1_mem_xalloc(struct snd_gf1_mem *alloc, struct snd_gf1_mem_block *block, + const char *name) { struct snd_gf1_mem_block *pblock, *nblock; @@ -33,6 +34,12 @@ static struct snd_gf1_mem_block *snd_gf1_mem_xalloc(struct snd_gf1_mem * alloc, if (nblock == NULL) return NULL; *nblock = *block; + nblock->name = kstrdup(name, GFP_KERNEL); + if (!nblock->name) { + kfree(nblock); + return NULL; + } + pblock = alloc->first; while (pblock) { if (pblock->ptr > nblock->ptr) { @@ -198,12 +205,7 @@ struct snd_gf1_mem_block *snd_gf1_mem_alloc(struct snd_gf1_mem * alloc, int owne if (share_id != NULL) 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); + nblock = snd_gf1_mem_xalloc(alloc, &block, name); snd_gf1_mem_lock(alloc, 1); return nblock; } @@ -240,14 +242,12 @@ int snd_gf1_mem_init(struct snd_gus_card * gus) if (gus->gf1.enh_mode) { block.ptr = 0; block.size = 1024; - block.name = kstrdup("InterWave LFOs", GFP_KERNEL); - if (block.name == NULL || snd_gf1_mem_xalloc(alloc, &block) == NULL) + if (!snd_gf1_mem_xalloc(alloc, &block, "InterWave LFOs")) return -ENOMEM; } block.ptr = gus->gf1.default_voice_address; block.size = 4; - block.name = kstrdup("Voice default (NULL's)", GFP_KERNEL); - if (block.name == NULL || snd_gf1_mem_xalloc(alloc, &block) == NULL) + if (!snd_gf1_mem_xalloc(alloc, &block, "Voice default (NULL's)")) return -ENOMEM; #ifdef CONFIG_SND_DEBUG snd_card_ro_proc_new(gus->card, "gusmem", gus, snd_gf1_mem_info_read); -- 2.31.1
