diff mbox series

[099/192] binfmt: remove in-tree usage of MAP_EXECUTABLE

Message ID 20210629023831.RGcYBYevz%akpm@linux-foundation.org (mailing list archive)
State New
Headers show
Series [001/192] mm/gup: fix try_grab_compound_head() race with split_huge_page() | expand

Commit Message

Andrew Morton June 29, 2021, 2:38 a.m. UTC 
From: David Hildenbrand <david@redhat.com>
Subject: binfmt: remove in-tree usage of MAP_EXECUTABLE

Ever since commit e9714acf8c43 ("mm: kill vma flag VM_EXECUTABLE and
mm->num_exe_file_vmas"), VM_EXECUTABLE is gone and MAP_EXECUTABLE is
essentially completely ignored.  Let's remove all usage of MAP_EXECUTABLE.

[akpm@linux-foundation.org: fix blooper in fs/binfmt_aout.c. per David]
Link: https://lkml.kernel.org/r/20210421093453.6904-3-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kevin Brodsky <Kevin.Brodsky@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/x86/ia32/ia32_aout.c |    4 ++--
 fs/binfmt_aout.c          |    4 ++--
 fs/binfmt_elf.c           |    2 +-
 fs/binfmt_elf_fdpic.c     |   11 ++---------
 fs/binfmt_flat.c          |    2 +-
 5 files changed, 8 insertions(+), 15 deletions(-)
diff mbox series

Patch

--- a/arch/x86/ia32/ia32_aout.c~binfmt-remove-in-tree-usage-of-map_executable
+++ a/arch/x86/ia32/ia32_aout.c
@@ -203,7 +203,7 @@  static int load_aout_binary(struct linux
 		error = vm_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
 				PROT_READ | PROT_EXEC,
 				MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE |
-				MAP_EXECUTABLE | MAP_32BIT,
+				MAP_32BIT,
 				fd_offset);
 
 		if (error != N_TXTADDR(ex))
@@ -212,7 +212,7 @@  static int load_aout_binary(struct linux
 		error = vm_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
 				PROT_READ | PROT_WRITE | PROT_EXEC,
 				MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE |
-				MAP_EXECUTABLE | MAP_32BIT,
+				MAP_32BIT,
 				fd_offset + ex.a_text);
 		if (error != N_DATADDR(ex))
 			return error;
--- a/fs/binfmt_aout.c~binfmt-remove-in-tree-usage-of-map_executable
+++ a/fs/binfmt_aout.c
@@ -222,7 +222,7 @@  static int load_aout_binary(struct linux
 
 		error = vm_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
 			PROT_READ | PROT_EXEC,
-			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
+			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
 			fd_offset);
 
 		if (error != N_TXTADDR(ex))
@@ -230,7 +230,7 @@  static int load_aout_binary(struct linux
 
 		error = vm_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
 				PROT_READ | PROT_WRITE | PROT_EXEC,
-				MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
+				MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
 				fd_offset + ex.a_text);
 		if (error != N_DATADDR(ex))
 			return error;
--- a/fs/binfmt_elf.c~binfmt-remove-in-tree-usage-of-map_executable
+++ a/fs/binfmt_elf.c
@@ -1070,7 +1070,7 @@  out_free_interp:
 		elf_prot = make_prot(elf_ppnt->p_flags, &arch_state,
 				     !!interpreter, false);
 
-		elf_flags = MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE;
+		elf_flags = MAP_PRIVATE | MAP_DENYWRITE;
 
 		vaddr = elf_ppnt->p_vaddr;
 		/*
--- a/fs/binfmt_elf_fdpic.c~binfmt-remove-in-tree-usage-of-map_executable
+++ a/fs/binfmt_elf_fdpic.c
@@ -928,7 +928,7 @@  static int elf_fdpic_map_file_constdisp_
 {
 	struct elf32_fdpic_loadseg *seg;
 	struct elf32_phdr *phdr;
-	unsigned long load_addr, base = ULONG_MAX, top = 0, maddr = 0, mflags;
+	unsigned long load_addr, base = ULONG_MAX, top = 0, maddr = 0;
 	int loop, ret;
 
 	load_addr = params->load_addr;
@@ -948,12 +948,8 @@  static int elf_fdpic_map_file_constdisp_
 	}
 
 	/* allocate one big anon block for everything */
-	mflags = MAP_PRIVATE;
-	if (params->flags & ELF_FDPIC_FLAG_EXECUTABLE)
-		mflags |= MAP_EXECUTABLE;
-
 	maddr = vm_mmap(NULL, load_addr, top - base,
-			PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0);
+			PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE, 0);
 	if (IS_ERR_VALUE(maddr))
 		return (int) maddr;
 
@@ -1046,9 +1042,6 @@  static int elf_fdpic_map_file_by_direct_
 		if (phdr->p_flags & PF_X) prot |= PROT_EXEC;
 
 		flags = MAP_PRIVATE | MAP_DENYWRITE;
-		if (params->flags & ELF_FDPIC_FLAG_EXECUTABLE)
-			flags |= MAP_EXECUTABLE;
-
 		maddr = 0;
 
 		switch (params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) {
--- a/fs/binfmt_flat.c~binfmt-remove-in-tree-usage-of-map_executable
+++ a/fs/binfmt_flat.c
@@ -573,7 +573,7 @@  static int load_flat_file(struct linux_b
 		pr_debug("ROM mapping of file (we hope)\n");
 
 		textpos = vm_mmap(bprm->file, 0, text_len, PROT_READ|PROT_EXEC,
-				  MAP_PRIVATE|MAP_EXECUTABLE, 0);
+				  MAP_PRIVATE, 0);
 		if (!textpos || IS_ERR_VALUE(textpos)) {
 			ret = textpos;
 			if (!textpos)