Re: [pseudo] [PATCH 0/3] closefrom/close_range: protect every pseudo fd, then drop one

[Babanpreet Singh <bbnpreetsingh@gmail.com>]

On Tue, 2026-07-28 at 16:59 +0100, Richard Purdie wrote:
> I think the missing piece is this:
>
> - if (op != OP_CHROOT && op != OP_CHDIR && op != OP_CLOSE && op != OP_CLOSEFROM && op != OP_DUP
> + if (op != OP_CHROOT && op != OP_CHDIR && op != OP_CLOSE && op != OP_CLOSEFROM && op != OP_CLOSE_RANGE && op != OP_DUP

Sorry for the breakage, and thanks for chasing it down.

I can reproduce it both ways on master-next at 6d65d74, with a probe that
opens an fd and calls close_range(fd, ~0U, 0):

  no PSEUDO_*_PATHS set                        OK
  PSEUDO_IGNORE_PATHS covering the fd's path   SIGSEGV
  PSEUDO_INCLUDE_PATHS set, path not in it     SIGSEGV
  same env, closefrom() instead                OK
  all of the above, plus your line             OK

For OP_CLOSE_RANGE the path comes from fd_path(lowfd), the ignore check
hits it, and pseudo_client_op() returns early with result still 0, which
close_range.c then dereferences.

Two things before I respin. Do you want the three fd-protect patches
resent, or will you carry the master-next commits since you have already
resolved the conflicts? And the ignore-path line: fold it into the
close_range patch with a Suggested-by, or keep it as your own commit ahead
of it? Either works for me.

Thanks,
Baban