diff options
| author | Richard Weinberger <richard@nod.at> | 2016-09-16 11:45:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-28 03:01:30 -0400 |
| commit | 0a5600d83fa5a251c91459779d5311a005e4c5b3 (patch) | |
| tree | fdb05eeb394ef3dbd0cda4dbdc57f8105e87103f /fs/ioctl.c | |
| parent | 2add76a428bc6b9e4506d9caa4f8ced9b8bdcb70 (diff) | |
ovl: Fix info leak in ovl_lookup_temp()
commit 6a45b3628ce4dcf7498b39c87d475bab6e2a9b24 upstream.
The function uses the memory address of a struct dentry as unique id.
While the address-based directory entry is only visible to root it is IMHO
still worth fixing since the temporary name does not have to be a kernel
address. It can be any unique number. Replace it by an atomic integer
which is allowed to wrap around.
Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: e9be9d5e76e3 ("overlay filesystem")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/ioctl.c')
0 files changed, 0 insertions, 0 deletions