From: David Hildenbrand <david@xxxxxxxxxx>
Subject: perf: MAP_EXECUTABLE does not indicate VM_MAYEXEC
Patch series "perf/binfmt/mm: remove in-tree usage of MAP_EXECUTABLE".
Stumbling over the history of MAP_EXECUTABLE, I noticed that we still have
some in-tree users that we can get rid of.
This patch (of 3):
Before commit e9714acf8c43 ("mm: kill vma flag VM_EXECUTABLE and
mm->num_exe_file_vmas"), VM_EXECUTABLE indicated MAP_EXECUTABLE.
MAP_EXECUTABLE is nowadays essentially ignored by the kernel and does not
relate to VM_MAYEXEC.
Link: https://lkml.kernel.org/r/20210421093453.6904-1-david@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20210421093453.6904-2-david@xxxxxxxxxx
Fixes: f972eb63b100 ("perf: Pass protection and flags bits through mmap2 interface")
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Acked-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Greg Ungerer <gerg@xxxxxxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Kevin Brodsky <Kevin.Brodsky@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Feng Tang <feng.tang@xxxxxxxxx>
Cc: Don Zickus <dzickus@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/events/core.c | 2 --
1 file changed, 2 deletions(-)
--- a/kernel/events/core.c~perf-map_executable-does-not-indicate-vm_mayexec
+++ a/kernel/events/core.c
@@ -8301,8 +8301,6 @@ static void perf_event_mmap_event(struct
if (vma->vm_flags & VM_DENYWRITE)
flags |= MAP_DENYWRITE;
- if (vma->vm_flags & VM_MAYEXEC)
- flags |= MAP_EXECUTABLE;
if (vma->vm_flags & VM_LOCKED)
flags |= MAP_LOCKED;
if (is_vm_hugetlb_page(vma))
_
