From: Yann Droneaud Date: Thu, 15 Aug 2013 13:10:53 +0000 (+0200) Subject: android/sw_sync: use get_unused_fd_flags(O_CLOEXEC) instead of get_unused_fd() X-Git-Tag: MMI-PSA29.97-13-9~13778^2~249 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=45acea57335ece628bdf96dc35d2ebdefd1efb9e;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git 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 Cc: Erik Gilling Cc: Colin Cross 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 --- 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;