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| author | Tobias Klauser <tklauser@distanz.ch> | 2023-03-08 11:51:26 +0100 |
|---|---|---|
| committer | Christian Brauner (Microsoft) <brauner@kernel.org> | 2023-03-08 12:31:34 +0100 |
| commit | a402f1e35313fc7ce2ca60f543c4402c2c7c3544 (patch) | |
| tree | 9de4756376f8c5d9a4d3999b830ca3ac8901415b /kernel/fork.c | |
| parent | Linux 6.3-rc1 (diff) | |
| download | linux-a402f1e35313fc7ce2ca60f543c4402c2c7c3544.tar.xz linux-a402f1e35313fc7ce2ca60f543c4402c2c7c3544.zip | |
fork: allow CLONE_NEWTIME in clone3 flags
Currently, calling clone3() with CLONE_NEWTIME in clone_args->flags
fails with -EINVAL. This is because CLONE_NEWTIME intersects with
CSIGNAL. However, CSIGNAL was deprecated when clone3 was introduced in
commit 7f192e3cd316 ("fork: add clone3"), allowing re-use of that part
of clone flags.
Fix this by explicitly allowing CLONE_NEWTIME in clone3_args_valid. This
is also in line with the respective check in check_unshare_flags which
allow CLONE_NEWTIME for unshare().
Fixes: 769071ac9f20 ("ns: Introduce Time Namespace")
Cc: Andrey Vagin <avagin@openvz.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index f68954d05e89..d8cda4c6de6c 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -2936,7 +2936,7 @@ static bool clone3_args_valid(struct kernel_clone_args *kargs) * - make the CLONE_DETACHED bit reusable for clone3 * - make the CSIGNAL bits reusable for clone3 */ - if (kargs->flags & (CLONE_DETACHED | CSIGNAL)) + if (kargs->flags & (CLONE_DETACHED | (CSIGNAL & (~CLONE_NEWTIME)))) return false; if ((kargs->flags & (CLONE_SIGHAND | CLONE_CLEAR_SIGHAND)) == |