Author: kib Date: Mon Oct 9 16:20:39 2017 New Revision: 324439 URL: https://svnweb.freebsd.org/changeset/base/324439
Log: Change amd64_get_ldt() to return 'EOF' when the LDT is not yet allocated, when requested range of descriptors does not fit into currently allocated LDT, or trim the return if the range fits partially. Before, the function returned EINVAL. Reviewed by: bde Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/amd64/amd64/sys_machdep.c Modified: head/sys/amd64/amd64/sys_machdep.c ============================================================================== --- head/sys/amd64/amd64/sys_machdep.c Mon Oct 9 16:19:26 2017 (r324438) +++ head/sys/amd64/amd64/sys_machdep.c Mon Oct 9 16:20:39 2017 (r324439) @@ -556,12 +556,12 @@ amd64_get_ldt(struct thread *td, struct i386_ldt_args uap->start, uap->num, (void *)uap->descs); #endif - if (uap->start >= max_ldt_segment) - return (EINVAL); - num = min(uap->num, max_ldt_segment - uap->start); pldt = td->td_proc->p_md.md_ldt; - if (pldt == NULL) - return (EINVAL); + if (pldt == NULL || uap->start >= max_ldt_segment || uap->num == 0) { + td->td_retval[0] = 0; + return (0); + } + num = min(uap->num, max_ldt_segment - uap->start); lp = &((struct user_segment_descriptor *)(pldt->ldt_base))[uap->start]; data = malloc(num * sizeof(struct user_segment_descriptor), M_TEMP, M_WAITOK); _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"