diff mbox series

[v1,2/3] binfmt: remove in-tree usage of MAP_EXECUTABLE

Message ID 20210421093453.6904-3-david@redhat.com (mailing list archive)
State New, archived
Headers show
Series perf/binfmt/mm: remove in-tree usage of MAP_EXECUTABLE | expand

Commit Message

David Hildenbrand April 21, 2021, 9:34 a.m. UTC 
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.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 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(-)

Comments

David Hildenbrand May 12, 2021, 1:12 p.m. UTC | #1 
On 21.04.21 11:34, David Hildenbrand wrote:
> 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.
> 
> Signed-off-by: David Hildenbrand <david@redhat.com>

[...]

> +++ b/fs/binfmt_aout.c
> @@ -222,7 +222,7 @@ static int load_aout_binary(struct linux_binprm * bprm)
>   
>   		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;

As reported by kernel test robot, this line should end with a ","

>   			fd_offset);
>   
>   		if (error != N_TXTADDR(ex))
> @@ -230,7 +230,7 @@ static int load_aout_binary(struct linux_binprm * bprm)
>   
>   		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);

dito


@Andrew, I think this resides your tree. Can you fix that up or shall I 
resend the series, or only this individual patch?
diff mbox series

Patch

diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
index a09fc37ead9d..5e5b9fc2747f 100644
--- a/arch/x86/ia32/ia32_aout.c
+++ b/arch/x86/ia32/ia32_aout.c
@@ -203,7 +203,7 @@  static int load_aout_binary(struct linux_binprm *bprm)
 		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_binprm *bprm)
 		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;
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index 3e84e9bb9084..12461f3ed04f 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -222,7 +222,7 @@  static int load_aout_binary(struct linux_binprm * bprm)
 
 		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_binprm * bprm)
 
 		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;
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index b12ba98ae9f5..e0427b817425 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1070,7 +1070,7 @@  static int load_elf_binary(struct linux_binprm *bprm)
 		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;
 		/*
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 3cfd6cd46f26..8723b6686b66 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -928,7 +928,7 @@  static int elf_fdpic_map_file_constdisp_on_uclinux(
 {
 	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_on_uclinux(
 	}
 
 	/* 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_mmap(struct elf_fdpic_params *params,
 		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) {
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index b9c658e0548e..98c2329d23d7 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -567,7 +567,7 @@  static int load_flat_file(struct linux_binprm *bprm,
 		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)