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| author | Yann Droneaud <ydroneaud@opteya.com> | 2013-08-22 10:20:05 -0600 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2013-08-22 10:20:05 -0600 |
| commit | a5d550703d2c2f0f9fc5fd4a249efa8984dc9353 (patch) | |
| tree | 00b36c506c9ca67ef4280dcaa37a67a9614e7be4 | |
| parent | 6cdd97821322352b94bb92f271b4466ad38a2468 (diff) | |
| download | linux-a5d550703d2c2f0f9fc5fd4a249efa8984dc9353.tar.gz linux-a5d550703d2c2f0f9fc5fd4a249efa8984dc9353.tar.xz | |
vfio: 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>
Link: http://lkml.kernel.org/r/cover.1376327678.git.ydroneaud@opteya.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
| -rw-r--r-- | drivers/vfio/vfio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index d3cb34224369..75c16cc5921a 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -1109,7 +1109,7 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf) * We can't use anon_inode_getfd() because we need to modify * the f_mode flags directly to allow more than just ioctls */ - ret = get_unused_fd(); + ret = get_unused_fd_flags(0); if (ret < 0) { device->ops->release(device->device_data); break; |