Re: [PATCH v4 01/13] buildid: Only consider GNU notes for build ID parsing

[Petr Mladek]

On Fri 2021-04-09 18:52:48, Stephen Boyd wrote:
> Some kernel elf files have various notes that also happen to have an elf
> note type of '3', which matches NT_GNU_BUILD_ID but the note name isn't
> "GNU". For example, this note trips up the existing logic:
> 
>  Owner  Data size   Description
>  Xen    0x00000008  Unknown note type: (0x00000003) description data: 00 00 00 ffffff80 ffffffff ffffffff ffffffff ffffffff
> 
> Let's make sure that it is a GNU note when parsing the build ID so that
> we can use this function to parse a vmlinux's build ID too.
> 
> Reported-by: Petr Mladek <pmladek@xxxxxxxx>
> Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
> Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
> Cc: Jessica Yu <jeyu@xxxxxxxxxx>
> Cc: Evan Green <evgreen@xxxxxxxxxxxx>
> Cc: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx>
> Fixes: bd7525dacd7e ("bpf: Move stack_map_get_build_id into lib")
> Signed-off-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>

Tested-by: Petr Mladek <pmladek@xxxxxxxx>

Best Regards,
Petr