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NFSD: Full checking of authentication name

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Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Kinglong Mee 2014-09-02 22:14:31 +08:00 committed by J. Bruce Fields
parent 48c348b09c
commit 13c82e8eb5
1 changed files with 5 additions and 9 deletions
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14
fs/nfsd/nfs4idmap.c
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@ -215,7 +215,8 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
memset(&ent, 0, sizeof(ent));
/* Authentication name */
if (qword_get(&buf, buf1, PAGE_SIZE) <= 0)
len = qword_get(&buf, buf1, PAGE_SIZE);
if (len <= 0 || len >= IDMAP_NAMESZ)
goto out;
memcpy(ent.authname, buf1, sizeof(ent.authname));
@ -245,12 +246,10 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
/* Name */
error = -EINVAL;
len = qword_get(&buf, buf1, PAGE_SIZE);
if (len < 0)
if (len < 0 || len >= IDMAP_NAMESZ)
goto out;
if (len == 0)
set_bit(CACHE_NEGATIVE, &ent.h.flags);
else if (len >= IDMAP_NAMESZ)
goto out;
else
memcpy(ent.name, buf1, sizeof(ent.name));
error = -ENOMEM;
@ -259,15 +258,12 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
goto out;
cache_put(&res->h, cd);
error = 0;
out:
kfree(buf1);
return error;
}
static struct ent *
idtoname_lookup(struct cache_detail *cd, struct ent *item)
{
@ -381,7 +377,8 @@ nametoid_parse(struct cache_detail *cd, char *buf, int buflen)
memset(&ent, 0, sizeof(ent));
/* Authentication name */
if (qword_get(&buf, buf1, PAGE_SIZE) <= 0)
len = qword_get(&buf, buf1, PAGE_SIZE);
if (len <= 0 || len >= IDMAP_NAMESZ)
goto out;
memcpy(ent.authname, buf1, sizeof(ent.authname));
@ -421,7 +418,6 @@ nametoid_parse(struct cache_detail *cd, char *buf, int buflen)
error = 0;
out:
kfree(buf1);
return (error);
}