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Fix an resource leak on audiobell close.

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audioclose() freed audio_file_t structure, but only audiobellclose
didn't pass there.  I change that all of freeing audio_file_t is done
by each *_close().
This commit is contained in:
isaki 2020-01-08 13:30:15 +00:00
parent 4d15c1eb43
commit 3b9c5d089b
1 changed files with 17 additions and 7 deletions
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22
sys/dev/audio/audio.c
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@ -1,4 +1,4 @@
/* $NetBSD: audio.c,v 1.38 2020/01/08 13:05:02 isaki Exp $ */
/* $NetBSD: audio.c,v 1.39 2020/01/08 13:30:15 isaki Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@ -142,7 +142,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.38 2020/01/08 13:05:02 isaki Exp $");
__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.39 2020/01/08 13:30:15 isaki Exp $");
#ifdef _KERNEL_OPT
#include "audio.h"
@ -530,6 +530,7 @@ static int audio_mmap(struct audio_softc *, off_t *, size_t, int, int *, int *,
struct uvm_object **, int *, audio_file_t *);
static int audioctl_open(dev_t, struct audio_softc *, int, int, struct lwp *);
static int audioctl_close(struct audio_softc *, audio_file_t *);
static void audio_pintr(void *);
static void audio_rintr(void *);
@ -1521,7 +1522,7 @@ audioclose(struct file *fp)
error = audio_close(sc, file);
break;
case AUDIOCTL_DEVICE:
error = 0;
error = audioctl_close(sc, file);
break;
case MIXER_DEVICE:
error = mixer_close(sc, file);
@ -1530,10 +1531,8 @@ audioclose(struct file *fp)
error = ENXIO;
break;
}
if (error == 0) {
kmem_free(fp->f_audioctx, sizeof(audio_file_t));
/* f_audioctx has already been freed in lower *_close() */
fp->f_audioctx = NULL;
}
return error;
}
@ -2196,6 +2195,8 @@ audio_close(struct audio_softc *sc, audio_file_t *file)
TRACE(3, "done");
audio_exit_exclusive(sc);
kmem_free(file, sizeof(*file));
return 0;
}
@ -3055,6 +3056,14 @@ audioctl_open(dev_t dev, struct audio_softc *sc, int flags, int ifmt,
return error;
}
static int
audioctl_close(struct audio_softc *sc, audio_file_t *file)
{
kmem_free(file, sizeof(*file));
return 0;
}
/*
* Free 'mem' if available, and initialize the pointer.
* For this reason, this is implemented as macro.
@ -7655,6 +7664,7 @@ mixer_close(struct audio_softc *sc, audio_file_t *file)
mixer_remove(sc);
mutex_exit(sc->sc_lock);
kmem_free(file, sizeof(*file));
return 0;
}