From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org Subject: [Bug 99901] iopl is lost on fork and execve Date: Tue, 16 Jun 2015 09:48:09 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-man-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-man@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=99901 Michael Kerrisk changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org --- Comment #1 from Michael Kerrisk --- Alex, Thanks for this report and also for https://bugzilla.kernel.org/show_bug.cgi?id=99911 I recall seeing your mailing list discussions on this and had been meaning to follow up. (In reply to Alex Henrie from comment #0) > Created attachment 179841 [details] > iopl3 test program > > `man iopl` currently states "Permissions are inherited by fork(2) and > execve(2)." This is not true. iopl has never been preserved across fork or > execve on x64 kernels,[1] and it has not been preserved across those > syscalls on x86 kernels since Linux 3.7.[2] There are no plans to change the > current behavior for either architecture.[3-6] Okay -- I'll come up with some man page text, but first I have a question in the other bug. Cheers, Michael > > A test program to demonstrate this behavior is attached. > > [1] > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/ > x86/kernel/process_64.c > [2] > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/arch/ > x86/kernel/process_32.c?id=6783eaa2e1253fbcbe2c2f6bb4c843abf1343caf > [3] https://lkml.org/lkml/2015/5/11/1054 > [4] https://lkml.org/lkml/2015/5/12/55 > [5] https://lkml.org/lkml/2015/5/12/537 > [6] https://lkml.org/lkml/2015/5/12/545 -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html