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Fix a possible kernel memory leak - if the cmdline of a process was

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requested after it had started to exit but before it became a zombie
a page of kernel memory wouldn't be free'd.
This commit is contained in:
simonb 2000-06-01 13:43:08 +00:00
parent dbbe2b1dd7
commit ab92666f6b
1 changed files with 4 additions and 2 deletions
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6
sys/miscfs/procfs/procfs_cmdline.c
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@ -1,4 +1,4 @@
/* $NetBSD: procfs_cmdline.c,v 1.7 2000/05/16 13:45:25 simonb Exp $ */
/* $NetBSD: procfs_cmdline.c,v 1.8 2000/06/01 13:43:08 simonb Exp $ */
/*
* Copyright (c) 1999 Jaromir Dolecek <dolecek@ics.muni.cz>
@ -105,8 +105,10 @@ procfs_docmdline(curp, p, pfs, uio)
* Lock the process down in memory.
*/
/* XXXCDC: how should locking work here? */
if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1))
if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) {
free(arg, M_TEMP);
return (EFAULT);
}
PHOLD(p);
p->p_vmspace->vm_refcnt++; /* XXX */