75af271ed5
We aren't allowed to pass NULL pointers to kmem_cache_destroy() so if both allocations fail, it leads to a NULL dereference. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David Teigland <teigland@redhat.com>
96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#include "dlm_internal.h"
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#include "config.h"
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#include "memory.h"
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static struct kmem_cache *lkb_cache;
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static struct kmem_cache *rsb_cache;
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int __init dlm_memory_init(void)
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{
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lkb_cache = kmem_cache_create("dlm_lkb", sizeof(struct dlm_lkb),
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__alignof__(struct dlm_lkb), 0, NULL);
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if (!lkb_cache)
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return -ENOMEM;
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rsb_cache = kmem_cache_create("dlm_rsb", sizeof(struct dlm_rsb),
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__alignof__(struct dlm_rsb), 0, NULL);
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if (!rsb_cache) {
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kmem_cache_destroy(lkb_cache);
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return -ENOMEM;
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}
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return 0;
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}
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void dlm_memory_exit(void)
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{
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if (lkb_cache)
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kmem_cache_destroy(lkb_cache);
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if (rsb_cache)
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kmem_cache_destroy(rsb_cache);
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}
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char *dlm_allocate_lvb(struct dlm_ls *ls)
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{
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char *p;
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p = kzalloc(ls->ls_lvblen, GFP_NOFS);
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return p;
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}
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void dlm_free_lvb(char *p)
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{
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kfree(p);
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}
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struct dlm_rsb *dlm_allocate_rsb(struct dlm_ls *ls)
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{
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struct dlm_rsb *r;
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r = kmem_cache_zalloc(rsb_cache, GFP_NOFS);
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return r;
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}
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void dlm_free_rsb(struct dlm_rsb *r)
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{
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if (r->res_lvbptr)
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dlm_free_lvb(r->res_lvbptr);
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kmem_cache_free(rsb_cache, r);
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}
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struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
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{
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struct dlm_lkb *lkb;
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lkb = kmem_cache_zalloc(lkb_cache, GFP_NOFS);
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return lkb;
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}
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void dlm_free_lkb(struct dlm_lkb *lkb)
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{
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if (lkb->lkb_flags & DLM_IFL_USER) {
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struct dlm_user_args *ua;
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ua = lkb->lkb_ua;
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if (ua) {
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if (ua->lksb.sb_lvbptr)
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kfree(ua->lksb.sb_lvbptr);
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kfree(ua);
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}
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}
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kmem_cache_free(lkb_cache, lkb);
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}
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