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gssapi/krb5: ensure singleton buffer in _gk_find_buffer()

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_gk_find_buffer() is used to locate singleton header, padding or trailer
buffers. Return NULL if multiple such buffers are found.
This commit is contained in:
Luke Howard
2020-07-12 15:54:52 +10:00
parent 33ff163141
commit c105b15605
1 changed files with 18 additions and 4 deletions
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22
lib/gssapi/krb5/cfx.c
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@@ -206,11 +206,25 @@ gss_iov_buffer_desc *
_gk_find_buffer(gss_iov_buffer_desc *iov, int iov_count, OM_uint32 type)
{
int i;
gss_iov_buffer_t iovp = GSS_C_NO_IOV_BUFFER;
for (i = 0; i < iov_count; i++)
if (type == GSS_IOV_BUFFER_TYPE(iov[i].type))
return &iov[i];
return NULL;
if (iov == GSS_C_NO_IOV_BUFFER)
return GSS_C_NO_IOV_BUFFER;
/*
* This function is used to find header, padding or trailer buffers
* which are singletons; return NULL if multiple instances are found.
*/
for (i = 0; i < iov_count; i++) {
if (type == GSS_IOV_BUFFER_TYPE(iov[i].type)) {
if (iovp == GSS_C_NO_IOV_BUFFER)
iovp = &iov[i];
else
return GSS_C_NO_IOV_BUFFER;
}
}
return iovp;
}
OM_uint32