Date: Thu, 12 Aug 2021 08:57:26 GMT From: Dmitry Chagin <dchagin@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 4385147547d9 - main - linux(4): Return ENOSYS for unsupported clone3 option bits. Message-ID: <202108120857.17C8vQcY064292@gitrepo.freebsd.org>
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The branch main has been updated by dchagin: URL: https://cgit.FreeBSD.org/src/commit/?id=4385147547d9f2f8b93f08012c0a18aa6d895403 commit 4385147547d9f2f8b93f08012c0a18aa6d895403 Author: Dmitry Chagin <dchagin@FreeBSD.org> AuthorDate: 2021-08-12 08:56:36 +0000 Commit: Dmitry Chagin <dchagin@FreeBSD.org> CommitDate: 2021-08-12 08:56:36 +0000 linux(4): Return ENOSYS for unsupported clone3 option bits. Differential Revision: https://reviews.freebsd.org/D31483 MFC after: 2 weeks --- sys/compat/linux/linux_fork.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/sys/compat/linux/linux_fork.c b/sys/compat/linux/linux_fork.c index 77dd8446c588..ba169ff98923 100644 --- a/sys/compat/linux/linux_fork.c +++ b/sys/compat/linux/linux_fork.c @@ -64,6 +64,7 @@ __FBSDID("$FreeBSD$"); #include <compat/linux/linux_emul.h> #include <compat/linux/linux_fork.h> #include <compat/linux/linux_futex.h> +#include <compat/linux/linux_mib.h> #include <compat/linux/linux_misc.h> #include <compat/linux/linux_util.h> @@ -411,6 +412,20 @@ linux_clone3_args_valid(struct l_user_clone_args *uca) if (uca->stack != 0 && uca->stack_size == 0) return (EINVAL); + /* Verify that no unsupported flags are passed along. */ + if ((uca->flags & LINUX_CLONE_NEWTIME) != 0) { + LINUX_RATELIMIT_MSG("unsupported clone3 option CLONE_NEWTIME"); + return (ENOSYS); + } + if ((uca->flags & LINUX_CLONE_INTO_CGROUP) != 0) { + LINUX_RATELIMIT_MSG("unsupported clone3 option CLONE_INTO_CGROUP"); + return (ENOSYS); + } + if (uca->set_tid != 0 || uca->set_tid_size != 0) { + LINUX_RATELIMIT_MSG("unsupported clone3 set_tid"); + return (ENOSYS); + } + return (0); }
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