https://bugzilla.kernel.org/show_bug.cgi?id=99901 Bug ID: 99901 Summary: iopl is lost on fork and execve Product: Documentation Version: unspecified Hardware: All OS: Linux Status: NEW Severity: normal Priority: P1 Component: man-pages Assignee: documentation_man-pages@xxxxxxxxxxxxxxxxxxxx Reporter: alexhenrie24@xxxxxxxxx Regression: No Created attachment 179841 --> https://bugzilla.kernel.org/attachment.cgi?id=179841&action=edit 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] 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@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
