Re: LXC broken with 5.10-stable?, ok with 5.9-stable (Re: Linux 5.10.3)

On Sun, Dec 27, 2020 at 11:05 AM Linus Torvalds torvalds@linux-foundation.org wrote:

On Sun, Dec 27, 2020 at 10:39 AM Jussi Kivilinna jussi.kivilinna@iki.fi wrote:

...

5.10.3 with patch compiles fine, but does not solve the issue.

Duh. adding the read_iter only fixes kernel_read(). For splice, it also needs a

    .splice_read = generic_file_splice_read,

in the file operations, something like this...

Ok, I verified that patch with the test-case in the bugzilla, and it seems trivially fine.

So it's committed as 14e3e989f6a5 ("proc mountinfo: make splice available again") now.

Linus