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* resolv/nss_dns/dns-host.c (_nss_dns_gethostbyaddr2_r): Check and

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adjust the buffer alignment.
This commit is contained in:
Ulrich Drepper 2009-01-08 00:03:29 +00:00
parent 5846e22fbf
commit df9293cb16
3 changed files with 29 additions and 11 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2008-12-31 Rafael Avila de Espindola <espindola@google.com>
* resolv/nss_dns/dns-host.c (_nss_dns_gethostbyaddr2_r): Check and
adjust the buffer alignment.
2009-01-07 Samuel Thibault <samuel.thibault@ens-lyon.org>
* sysdeps/mach/hurd/Makefile (sysdep_headers) [subdir=socket]:

20
nptl/allocatestack.c
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@ -115,7 +115,7 @@ static LIST_HEAD (stack_used);
/* We need to record what list operations we are going to do so that,
in case of an asynchronous interruption due to a fork() call, we
can correct for the work. */
static uintptr_t *in_flight_stack;
static uintptr_t in_flight_stack;
/* List of the threads with user provided stacks in use. No need to
initialize this, since it's done in __pthread_initialize_minimal. */
@ -815,10 +815,10 @@ __reclaim_stacks (void)
we have to be aware that we might have interrupted a list
operation. */
if (in_flight_stack != NULL)
if (in_flight_stack != 0)
{
bool add_p = in_flight_stack & 1;
in_flight_stack = (list_t *) (in_flight_stack & ~1l);
list_t *elem = (list_t *) (in_flight_stack & ~UINTMAX_C (1));
if (add_p)
{
@ -828,11 +828,11 @@ __reclaim_stacks (void)
{
if (l->next->prev != l)
{
assert (l->next->prev == in_flight_stack);
assert (l->next->prev == elem);
in_flight_stack->next = l->next;
in_flight_stack->prev = l;
l->next = in_flight_stack;
elem->next = l->next;
elem->prev = l;
l->next = elem;
return 1;
}
@ -846,11 +846,11 @@ __reclaim_stacks (void)
else
{
/* We can simply always replay the delete operation. */
in_flight_stack->next->prev = in_flight_stack->prev;
in_flight_stack->prev->next = in_flight_stack->next;
elem->next->prev = elem->prev;
elem->prev->next = elem->next;
}
in_flight_stack = NULL;
in_flight_stack = 0;
}
/* Mark all stacks except the still running one as free. */

15
resolv/nss_dns/dns-host.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1996-2004, 2007, 2008 Free Software Foundation, Inc.
/* Copyright (C) 1996-2004, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996.
@ -376,6 +376,19 @@ _nss_dns_gethostbyaddr2_r (const void *addr, socklen_t len, int af,
int n, status;
int olderr = errno;
uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct host_data);
buffer += pad;
buflen = buflen > pad ? buflen - pad : 0;
if (__builtin_expect (buflen < sizeof (struct host_data), 0))
{
*errnop = ERANGE;
*h_errnop = NETDB_INTERNAL;
return NSS_STATUS_TRYAGAIN;
}
host_data = (struct host_data *) buffer;
if (__res_maybe_init (&_res, 0) == -1)
return NSS_STATUS_UNAVAIL;