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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-02 14:36:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-02 14:36:19 -0700 |
| commit | d7b767b5088d57ff9b5f9a0060c9ad0f9410b1c0 (patch) | |
| tree | 377247ed59febb6aa236adbbeca15d3d3aea09f7 /kernel | |
| parent | 9a8ac9ee07d445d81963756f0b18af4f06692258 (diff) | |
| parent | c6e8e36c6ae4b11bed5643317afb66b6c3cadba8 (diff) | |
Merge tag 'execve-v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull execve updates from Kees Cook:
- Allow unsharing time namespace on vfork+exec (Andrei Vagin)
- Replace usage of deprecated kmap APIs (Fabio M. De Francesco)
- Fix spelling mistake (Zhang Jiaming)
* tag 'execve-v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
exec: Call kmap_local_page() in copy_string_kernel()
exec: Fix a spelling mistake
selftests/timens: add a test for vfork+exit
fs/exec: allow to unshare a time namespace on vfork+exec
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/fork.c | 5 | ||||
| -rw-r--r-- | kernel/nsproxy.c | 3 |
2 files changed, 6 insertions, 2 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 9d44f2d46c69..9174146f6812 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -2033,8 +2033,11 @@ static __latent_entropy struct task_struct *copy_process( /* * If the new process will be in a different time namespace * do not allow it to share VM or a thread group with the forking task. + * + * On vfork, the child process enters the target time namespace only + * after exec. */ - if (clone_flags & (CLONE_THREAD | CLONE_VM)) { + if ((clone_flags & (CLONE_VM | CLONE_VFORK)) == CLONE_VM) { if (nsp->time_ns != nsp->time_ns_for_children) return ERR_PTR(-EINVAL); } diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c index eec72ca962e2..b4cbb406bc28 100644 --- a/kernel/nsproxy.c +++ b/kernel/nsproxy.c @@ -179,7 +179,8 @@ int copy_namespaces(unsigned long flags, struct task_struct *tsk) if (IS_ERR(new_ns)) return PTR_ERR(new_ns); - timens_on_fork(new_ns, tsk); + if ((flags & CLONE_VM) == 0) + timens_on_fork(new_ns, tsk); tsk->nsproxy = new_ns; return 0; |