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Fix potential double close in __check_fd if OOM

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This commit is contained in:
Ulrich Drepper
2011-10-30 14:22:57 -04:00
parent 2a0c698e24
commit 636064eb4c
2 changed files with 24 additions and 15 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2011-10-30 Ulrich Drepper <drepper@gmail.com>
* sysdeps/unix/sysv/linux/check_pf.c (make_request): Don't call
close_not_cancel_no_status here.
(__check_pf): Reorganize code a bit to not call close twice if OOM.
2011-10-29 Ulrich Drepper <drepper@gmail.com> 2011-10-29 Ulrich Drepper <drepper@gmail.com>
[BZ #13276] [BZ #13276]

21
sysdeps/unix/sysv/linux/check_pf.c
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@ -211,8 +211,6 @@ make_request (int fd, pid_t pid, bool *seen_ipv4, bool *seen_ipv6,
} }
while (! done); while (! done);
close_not_cancel_no_status (fd);
if (*seen_ipv6 && in6ailist != NULL) if (*seen_ipv6 && in6ailist != NULL)
{ {
*in6ai = malloc (in6ailistlen * sizeof (**in6ai)); *in6ai = malloc (in6ailistlen * sizeof (**in6ai));
@ -262,22 +260,27 @@ __check_pf (bool *seen_ipv4, bool *seen_ipv6,
{ {
int fd = __socket (PF_NETLINK, SOCK_RAW, NETLINK_ROUTE); int fd = __socket (PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (__builtin_expect (fd >= 0, 1))
{
struct sockaddr_nl nladdr; struct sockaddr_nl nladdr;
memset (&nladdr, '\0', sizeof (nladdr)); memset (&nladdr, '\0', sizeof (nladdr));
nladdr.nl_family = AF_NETLINK; nladdr.nl_family = AF_NETLINK;
socklen_t addr_len = sizeof (nladdr); socklen_t addr_len = sizeof (nladdr);
if (fd >= 0 bool success
&& __bind (fd, (struct sockaddr *) &nladdr, sizeof (nladdr)) == 0 = (__bind (fd, (struct sockaddr *) &nladdr, sizeof (nladdr)) == 0
&& __getsockname (fd, (struct sockaddr *) &nladdr, &addr_len) == 0 && __getsockname (fd, (struct sockaddr *) &nladdr,
&addr_len) == 0
&& make_request (fd, nladdr.nl_pid, seen_ipv4, seen_ipv6, && make_request (fd, nladdr.nl_pid, seen_ipv4, seen_ipv6,
in6ai, in6ailen) == 0) in6ai, in6ailen) == 0);
close_not_cancel_no_status (fd);
if (success)
/* It worked. */ /* It worked. */
return; return;
}
if (fd >= 0)
__close (fd);
#if __ASSUME_NETLINK_SUPPORT == 0 #if __ASSUME_NETLINK_SUPPORT == 0
/* Remember that there is no netlink support. */ /* Remember that there is no netlink support. */