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Make sure that memory freed as M_VERIEXEC was allocated with that type.

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Pointed out by Jason Thorpe, thanks!
This commit is contained in:
elad 2006-11-30 01:42:21 +00:00
parent 0c67c581a5
commit cc26e2da8f
1 changed files with 11 additions and 4 deletions
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15
sys/kern/kern_verifiedexec.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_verifiedexec.c,v 1.75 2006/11/30 01:09:47 elad Exp $ */
/* $NetBSD: kern_verifiedexec.c,v 1.76 2006/11/30 01:42:21 elad Exp $ */
/*-
* Copyright 2005 Elad Efrat <elad@NetBSD.org>
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_verifiedexec.c,v 1.75 2006/11/30 01:09:47 elad Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_verifiedexec.c,v 1.76 2006/11/30 01:42:21 elad Exp $");
#include "opt_veriexec.h"
@ -987,12 +987,19 @@ veriexec_file_add(struct lwp *l, prop_dictionary_t dict)
goto out;
}
vfe->fp = prop_data_data(prop_dictionary_get(dict, "fp"));
if (vfe->fp == NULL) {
if (prop_data_size(prop_dictionary_get(dict, "fp")) !=
vfe->ops->hash_len) {
free(vfe, M_VERIEXEC);
log(LOG_ERR, "Veriexec: Bad fingerprint length for `%s'.\n",
file);
error = EINVAL;
goto out;
}
vfe->fp = malloc(vfe->ops->hash_len, M_VERIEXEC, M_WAITOK);
memcpy(vfe->fp, prop_data_data_nocopy(prop_dictionary_get(dict, "fp")),
vfe->ops->hash_len);
/*
* See if we already have an entry for this file. If we do, then
* let the user know and silently pretend to succeed.