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 Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ 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 -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html