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authorYann Droneaud <ydroneaud@opteya.com>2013-07-02 18:39:36 +0200
committerDavid S. Miller <davem@davemloft.net>2013-07-02 16:14:11 -0700
commit8a59bd3e9b296b93b905b5509c4ff540ee0e00bf (patch)
treef4ce549a3a6beaac973d3d60c997e80bc474b86f /net/sctp
parent83d7af64ac9eaf4f4db7228677bc25f23c383790 (diff)
downloadlinux-8a59bd3e9b296b93b905b5509c4ff540ee0e00bf.tar.gz
sctp: use get_unused_fd_flags(0) instead of get_unused_fd()
Macro get_unused_fd() is used to allocate a file descriptor with default flags. Those default flags (0) can be "unsafe": O_CLOEXEC must be used by default to not leak file descriptor across exec(). Instead of macro get_unused_fd(), functions anon_inode_getfd() or get_unused_fd_flags() should be used with flags given by userspace. If not possible, flags should be set to O_CLOEXEC to provide userspace with a default safe behavor. In a further patch, get_unused_fd() will be removed so that new code start using anon_inode_getfd() or get_unused_fd_flags() with correct flags. This patch replaces calls to get_unused_fd() with equivalent call to get_unused_fd_flags(0) to preserve current behavor for existing code. The hard coded flag value (0) should be reviewed on a per-subsystem basis, and, if possible, set to O_CLOEXEC. Signed-off-by: Yann Droneaud <ydroneaud@opteya.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/socket.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index d5c6a287047..c6670d2e3f8 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4312,7 +4312,7 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval
goto out;
/* Map the socket to an unused fd that can be returned to the user. */
- retval = get_unused_fd();
+ retval = get_unused_fd_flags(0);
if (retval < 0) {
sock_release(newsock);
goto out;