On 12/07/13 14:48, Daniel Kiper wrote:
> get_pt_note_info() always ignores VMCOREINFO_XEN note
> because buf size is too small. It does not have place
> for \0 char which marks EOS. This patch fixes that bug
> and VMCOREINFO_XEN note living in /proc/vmcore file
> could be properly detected now.
>
> Signed-off-by: Daniel Kiper <daniel.kiper at oracle.com>
> ---
> elf_info.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/elf_info.c b/elf_info.c
> index 0c1e36a..70a6dd2 100644
> --- a/elf_info.c
> +++ b/elf_info.c
> @@ -310,7 +310,7 @@ get_pt_note_info(void)
> {
> int n_type, size_name, size_desc;
> off_t offset, offset_desc;
> - char buf[VMCOREINFO_XEN_NOTE_NAME_BYTES];
> + char buf[VMCOREINFO_XEN_NOTE_NAME_BYTES + 1];
> char note[MAX_SIZE_NHDR];
>
> nr_cpus = 0;
Elf Note namesz is defined to include the terminating null character, so
I would argue that VMCOREINFO_XEN_NOTE_NAME_BYTES is off-by-one.
~Andrew
