Re: [PATCH stable 6.6] lib/buildid: Handle memfd_secret() files in build_id_parse()

[Greg KH]

On Tue, Mar 11, 2025 at 06:05:55PM +0800, Chen Linxuan wrote:
> Backport of a similar change from commit 5ac9b4e935df ("lib/buildid:
> Handle memfd_secret() files in build_id_parse()") to address an issue
> where accessing secret memfd contents through build_id_parse() would
> trigger faults.
> 
> Original report and repro can be found in [0].
> 
>   [0] https://lore.kernel.org/bpf/ZwyG8Uro%2FSyTXAni@ly-workstation/
> 
> This repro will cause BUG: unable to handle kernel paging request in
> build_id_parse in 5.15/6.1/6.6.
> 
> Some other discussions can be found in [1].
> 
>   [1] https://lore.kernel.org/bpf/20241104175256.2327164-1-jolsa@xxxxxxxxxx/T/#u
> 
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 88a16a130933 ("perf: Add build id data in mmap2 event")
> Signed-off-by: Chen Linxuan <chenlinxuan@xxxxxxxxxx>

You dropped all the original signed-off-by and changelog text.  Just
provide a backport with all of the original information, and then if you
had to do something "different", put that in the signed-off-by area.
THere are loads of examples on the list for how that was done.

thanks,

greg k-h