The patch titled
Subject: exec: simplify the copy_strings_kernel calling convention
has been added to the -mm tree. Its filename is
exec-simplify-the-copy_strings_kernel-calling-convention.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/exec-simplify-the-copy_strings_kernel-calling-convention.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/exec-simplify-the-copy_strings_kernel-calling-convention.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: exec: simplify the copy_strings_kernel calling convention
copy_strings_kernel is always used with a single argument,
adjust the calling convention to that.
Link: http://lkml.kernel.org/r/20200501104105.2621149-2-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/binfmt_em86.c | 6 +++---
fs/binfmt_misc.c | 4 ++--
fs/binfmt_script.c | 6 +++---
fs/exec.c | 13 ++++++-------
include/linux/binfmts.h | 3 +--
5 files changed, 15 insertions(+), 17 deletions(-)
--- a/fs/binfmt_em86.c~exec-simplify-the-copy_strings_kernel-calling-convention
+++ a/fs/binfmt_em86.c
@@ -68,15 +68,15 @@ static int load_em86(struct linux_binprm
* user environment and arguments are stored.
*/
remove_arg_zero(bprm);
- retval = copy_strings_kernel(1, &bprm->filename, bprm);
+ retval = copy_string_kernel(bprm->filename, bprm);
if (retval < 0) return retval;
bprm->argc++;
if (i_arg) {
- retval = copy_strings_kernel(1, &i_arg, bprm);
+ retval = copy_string_kernel(i_arg, bprm);
if (retval < 0) return retval;
bprm->argc++;
}
- retval = copy_strings_kernel(1, &i_name, bprm);
+ retval = copy_string_kernel(i_name, bprm);
if (retval < 0) return retval;
bprm->argc++;
--- a/fs/binfmt_misc.c~exec-simplify-the-copy_strings_kernel-calling-convention
+++ a/fs/binfmt_misc.c
@@ -190,13 +190,13 @@ static int load_misc_binary(struct linux
bprm->file = NULL;
}
/* make argv[1] be the path to the binary */
- retval = copy_strings_kernel(1, &bprm->interp, bprm);
+ retval = copy_string_kernel(bprm->interp, bprm);
if (retval < 0)
goto error;
bprm->argc++;
/* add the interp as argv[0] */
- retval = copy_strings_kernel(1, &fmt->interpreter, bprm);
+ retval = copy_string_kernel(fmt->interpreter, bprm);
if (retval < 0)
goto error;
bprm->argc++;
--- a/fs/binfmt_script.c~exec-simplify-the-copy_strings_kernel-calling-convention
+++ a/fs/binfmt_script.c
@@ -117,17 +117,17 @@ static int load_script(struct linux_binp
retval = remove_arg_zero(bprm);
if (retval)
return retval;
- retval = copy_strings_kernel(1, &bprm->interp, bprm);
+ retval = copy_string_kernel(bprm->interp, bprm);
if (retval < 0)
return retval;
bprm->argc++;
if (i_arg) {
- retval = copy_strings_kernel(1, &i_arg, bprm);
+ retval = copy_string_kernel(i_arg, bprm);
if (retval < 0)
return retval;
bprm->argc++;
}
- retval = copy_strings_kernel(1, &i_name, bprm);
+ retval = copy_string_kernel(i_name, bprm);
if (retval)
return retval;
bprm->argc++;
--- a/fs/exec.c~exec-simplify-the-copy_strings_kernel-calling-convention
+++ a/fs/exec.c
@@ -588,24 +588,23 @@ out:
}
/*
- * Like copy_strings, but get argv and its values from kernel memory.
+ * Copy and argument/environment string from the kernel to the processes stack.
*/
-int copy_strings_kernel(int argc, const char *const *__argv,
- struct linux_binprm *bprm)
+int copy_string_kernel(const char *arg, struct linux_binprm *bprm)
{
int r;
mm_segment_t oldfs = get_fs();
struct user_arg_ptr argv = {
- .ptr.native = (const char __user *const __user *)__argv,
+ .ptr.native = (const char __user *const __user *)&arg,
};
set_fs(KERNEL_DS);
- r = copy_strings(argc, argv, bprm);
+ r = copy_strings(1, argv, bprm);
set_fs(oldfs);
return r;
}
-EXPORT_SYMBOL(copy_strings_kernel);
+EXPORT_SYMBOL(copy_string_kernel);
#ifdef CONFIG_MMU
@@ -1863,7 +1862,7 @@ static int __do_execve_file(int fd, stru
if (retval < 0)
goto out;
- retval = copy_strings_kernel(1, &bprm->filename, bprm);
+ retval = copy_string_kernel(bprm->filename, bprm);
if (retval < 0)
goto out;
--- a/include/linux/binfmts.h~exec-simplify-the-copy_strings_kernel-calling-convention
+++ a/include/linux/binfmts.h
@@ -144,8 +144,7 @@ extern int setup_arg_pages(struct linux_
extern int transfer_args_to_stack(struct linux_binprm *bprm,
unsigned long *sp_location);
extern int bprm_change_interp(const char *interp, struct linux_binprm *bprm);
-extern int copy_strings_kernel(int argc, const char *const *argv,
- struct linux_binprm *bprm);
+int copy_string_kernel(const char *arg, struct linux_binprm *bprm);
extern void install_exec_creds(struct linux_binprm *bprm);
extern void set_binfmt(struct linux_binfmt *new);
extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
_
Patches currently in -mm which might be from hch@xxxxxx are
x86-hyperv-use-vmalloc_exec-for-the-hypercall-page.patch
x86-fix-vmap-arguments-in-map_irq_stack.patch
staging-android-ion-use-vmap-instead-of-vm_map_ram.patch
staging-media-ipu3-use-vmap-instead-of-reimplementing-it.patch
dma-mapping-use-vmap-insted-of-reimplementing-it.patch
powerpc-add-an-ioremap_phb-helper.patch
powerpc-remove-__ioremap_at-and-__iounmap_at.patch
mm-remove-__get_vm_area.patch
mm-unexport-unmap_kernel_range_noflush.patch
mm-rename-config_pgtable_mapping-to-config_zsmalloc_pgtable_mapping.patch
mm-only-allow-page-table-mappings-for-built-in-zsmalloc.patch
mm-pass-addr-as-unsigned-long-to-vb_free.patch
mm-remove-vmap_page_range_noflush-and-vunmap_page_range.patch
mm-rename-vmap_page_range-to-map_kernel_range.patch
mm-dont-return-the-number-of-pages-from-map_kernel_range_noflush.patch
mm-remove-map_vm_range.patch
mm-remove-unmap_vmap_area.patch
mm-remove-the-prot-argument-from-vm_map_ram.patch
mm-enforce-that-vmap-cant-map-pages-executable.patch
gpu-drm-remove-the-powerpc-hack-in-drm_legacy_sg_alloc.patch
mm-remove-the-pgprot-argument-to-__vmalloc.patch
mm-remove-the-prot-argument-to-__vmalloc_node.patch
mm-remove-both-instances-of-__vmalloc_node_flags.patch
mm-remove-__vmalloc_node_flags_caller.patch
mm-switch-the-test_vmalloc-module-to-use-__vmalloc_node.patch
mm-remove-vmalloc_user_node_flags.patch
arm64-use-__vmalloc_node-in-arch_alloc_vmap_stack.patch
powerpc-use-__vmalloc_node-in-alloc_vm_stack.patch
s390-use-__vmalloc_node-in-stack_alloc.patch
exec-simplify-the-copy_strings_kernel-calling-convention.patch
exec-open-code-copy_string_kernel.patch
amdgpu-a-null-mm-does-not-mean-a-thread-is-a-kthread.patch
kernel-move-use_mm-unuse_mm-to-kthreadc.patch
kernel-move-use_mm-unuse_mm-to-kthreadc-v2.patch
kernel-better-document-the-use_mm-unuse_mm-api-contract.patch
kernel-better-document-the-use_mm-unuse_mm-api-contract-v2.patch
kernel-set-user_ds-in-kthread_use_mm.patch
