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Properly fix memory leak in _nss_dns_gethostbyname4_r with big DNS answer

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Instead of trying to guess whether the second buffer needs to be freed
set a flag at the place it is allocated
This commit is contained in:
Andreas Schwab
2014-02-18 10:57:25 +01:00
parent c6af2d896c
commit ab09bf616a
8 changed files with 95 additions and 49 deletions
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4
resolv/nss_dns/dns-network.c
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@ -129,7 +129,7 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
1024, &net_buffer.ptr, NULL, NULL, NULL);
1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
if (anslen < 0)
{
/* Nothing found. */
@ -205,7 +205,7 @@ _nss_dns_getnetbyaddr_r (uint32_t net, int type, struct netent *result,
net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
anslen = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
1024, &net_buffer.ptr, NULL, NULL, NULL);
1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
if (anslen < 0)
{
/* Nothing found. */