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authorYann Droneaud <ydroneaud@opteya.com>2013-08-15 15:10:53 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-08-15 17:26:44 -0700
commit45acea57335ece628bdf96dc35d2ebdefd1efb9e (patch)
tree98d76353bad56ba61ce670577c64c61dbcf4eef4 /drivers
parentf0c5ba2815d589854dff557b913a1b61b22bb458 (diff)
android/sw_sync: use get_unused_fd_flags(O_CLOEXEC) 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 call to get_unused_fd_flags(O_CLOEXEC) following advice from Erik Gilling. Signed-off-by: Yann Droneaud <ydroneaud@opteya.com> Cc: Erik Gilling <konkers@android.com> Cc: Colin Cross <ccross@google.com> Link: http://lkml.kernel.org/r/CACSP8SjZcpcpEtQHzcGYhf-MP7QGo0XpN7-uN7rmD=vNtopG=w@mail.gmail.com Link: http://lkml.kernel.org/r/cover.1376327678.git.ydroneaud@opteya.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/staging/android/sw_sync.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/android/sw_sync.c b/drivers/staging/android/sw_sync.c
index 765c757b120f..f24493ac65e3 100644
--- a/drivers/staging/android/sw_sync.c
+++ b/drivers/staging/android/sw_sync.c
@@ -163,7 +163,7 @@ static int sw_sync_release(struct inode *inode, struct file *file)
static long sw_sync_ioctl_create_fence(struct sw_sync_timeline *obj,
unsigned long arg)
{
- int fd = get_unused_fd();
+ int fd = get_unused_fd_flags(O_CLOEXEC);
int err;
struct sync_pt *pt;
struct sync_fence *fence;