Subject: + vmcore-allow-user-process-to-remap-elf-note-segment-buffer.patch added to -mm tree
To: d.hatayama@xxxxxxxxxxxxxx,kosaki.motohiro@xxxxxxxxxxxxxx,kumagai-atsushi@xxxxxxxxxxxxxxxxx,lisa.mitchell@xxxxxx,vgoyal@xxxxxxxxxx,zhangyanfei@xxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 23 May 2013 15:25:11 -0700
The patch titled
Subject: vmcore: allow user process to remap ELF note segment buffer
has been added to the -mm tree. Its filename is
vmcore-allow-user-process-to-remap-elf-note-segment-buffer.patch
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From: HATAYAMA Daisuke <d.hatayama@xxxxxxxxxxxxxx>
Subject: vmcore: allow user process to remap ELF note segment buffer
Now ELF note segment has been copied in the buffer on vmalloc memory. To
allow user process to remap the ELF note segment buffer with
remap_vmalloc_page, the corresponding VM area object has to have
VM_USERMAP flag set.
Signed-off-by: HATAYAMA Daisuke <d.hatayama@xxxxxxxxxxxxxx>
Acked-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Atsushi Kumagai <kumagai-atsushi@xxxxxxxxxxxxxxxxx>
Cc: Lisa Mitchell <lisa.mitchell@xxxxxx>
Cc: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/vmcore.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff -puN fs/proc/vmcore.c~vmcore-allow-user-process-to-remap-elf-note-segment-buffer fs/proc/vmcore.c
--- a/fs/proc/vmcore.c~vmcore-allow-user-process-to-remap-elf-note-segment-buffer
+++ a/fs/proc/vmcore.c
@@ -369,6 +369,7 @@ static int __init merge_note_headers_elf
Elf64_Ehdr *ehdr_ptr;
Elf64_Phdr phdr;
u64 phdr_sz = 0, note_off;
+ struct vm_struct *vm;
ehdr_ptr = (Elf64_Ehdr *)elfptr;
@@ -385,6 +386,12 @@ static int __init merge_note_headers_elf
if (!*notes_buf)
return -ENOMEM;
+ /* Allow users to remap ELF note segment buffer on vmalloc
+ * memory using remap_vmalloc_range. */
+ vm = find_vm_area(*notes_buf);
+ BUG_ON(!vm);
+ vm->flags |= VM_USERMAP;
+
rc = copy_notes_elf64(ehdr_ptr, *notes_buf);
if (rc < 0)
return rc;
@@ -548,6 +555,7 @@ static int __init merge_note_headers_elf
Elf32_Ehdr *ehdr_ptr;
Elf32_Phdr phdr;
u64 phdr_sz = 0, note_off;
+ struct vm_struct *vm;
ehdr_ptr = (Elf32_Ehdr *)elfptr;
@@ -564,6 +572,12 @@ static int __init merge_note_headers_elf
if (!*notes_buf)
return -ENOMEM;
+ /* Allow users to remap ELF note segment buffer on vmalloc
+ * memory using remap_vmalloc_range. */
+ vm = find_vm_area(*notes_buf);
+ BUG_ON(!vm);
+ vm->flags |= VM_USERMAP;
+
rc = copy_notes_elf32(ehdr_ptr, *notes_buf);
if (rc < 0)
return rc;
_
Patches currently in -mm which might be from d.hatayama@xxxxxxxxxxxxxx are
include-linux-mmh-add-page_aligned-helper.patch
vmcore-clean-up-read_vmcore.patch
vmcore-allocate-buffer-for-elf-headers-on-page-size-alignment.patch
vmcore-allocate-buffer-for-elf-headers-on-page-size-alignment-fix.patch
vmcore-treat-memory-chunks-referenced-by-pt_load-program-header-entries-in-page-size-boundary-in-vmcore_list.patch
vmalloc-make-find_vm_area-check-in-range.patch
vmalloc-introduce-remap_vmalloc_range_partial.patch
vmalloc-introduce-remap_vmalloc_range_partial-fix.patch
vmcore-allocate-elf-note-segment-in-the-2nd-kernel-vmalloc-memory.patch
vmcore-allocate-elf-note-segment-in-the-2nd-kernel-vmalloc-memory-fix.patch
vmcore-allow-user-process-to-remap-elf-note-segment-buffer.patch
vmcore-allow-user-process-to-remap-elf-note-segment-buffer-fix.patch
vmcore-calculate-vmcore-file-size-from-buffer-size-and-total-size-of-vmcore-objects.patch
vmcore-support-mmap-on-proc-vmcore.patch
vmcore-support-mmap-on-proc-vmcore-fix.patch
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