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Set pointers to NULL after free() to prevent multiple free().

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PR:		 kern/48808
Submitted by:	 Eugene Grosbein <eugen@grosbein.pp.ru>
This commit is contained in:
Matthew N. Dodd 2003-06-25 19:58:38 +00:00
parent 81b9fd77b5
commit 17d7127c64
1 changed files with 3 additions and 0 deletions
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3
sys/dev/usb/uhid.c
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@ -425,6 +425,8 @@ uhidopen(dev_t dev, int flag, int mode, usb_proc_ptr p)
"error=%d\n",err));
free(sc->sc_ibuf, M_USBDEV);
free(sc->sc_obuf, M_USBDEV);
sc->sc_ibuf = sc->sc_obuf = NULL;
sc->sc_state &= ~UHID_OPEN;
return (EIO);
}
@ -455,6 +457,7 @@ uhidclose(dev_t dev, int flag, int mode, usb_proc_ptr p)
free(sc->sc_ibuf, M_USBDEV);
free(sc->sc_obuf, M_USBDEV);
sc->sc_ibuf = sc->sc_obuf = NULL;
sc->sc_state &= ~UHID_OPEN;