linux-kernel - [GIT PULL] Modules updates for v5.13

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Date:   Wed, 28 Apr 2021 14:58:44 +0200
From:   Jessica Yu <jeyu@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org
Subject: [GIT PULL] Modules updates for v5.13

Hi Linus,

Please pull below to receive modules updates for the v5.13 merge window.
A summary can be found in the signed tag.

Thank you,

Jessica

--
The following changes since commit 1e28eed17697bcf343c6743f0028cc3b5dd88bf0:

   Linux 5.12-rc3 (2021-03-14 14:41:02 -0700)

are available in the Git repository at:

   git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux.git tags/modules-for-v5.13

for you to fetch changes up to 33121347fb1c359bd6e3e680b9f2c6ced5734a81:

   module: treat exit sections the same as init sections when !CONFIG_MODULE_UNLOAD (2021-03-29 13:08:53 +0200)

----------------------------------------------------------------
Modules updates for v5.13

Summary of modules changes for the 5.13 merge window:

- Fix an age old bug involving jump_calls and static_labels when
   CONFIG_MODULE_UNLOAD=n. When CONFIG_MODULE_UNLOAD=n, it means you
   can't unload modules, so normally the __exit sections of a module are
   not loaded at all. However, dynamic code patching (jump_label,
   static_call, alternatives) can have sites in __exit sections even if
   __exit is never executed.

   Reported by Peter Zijlstra: "Alternatives, jump_labels and static_call
   all can have relocations into __exit code.  Not loading it at all would
   be BAD." Therefore, load the __exit sections even when
   CONFIG_MODULE_UNLOAD=n, and discard them after init.

Signed-off-by: Jessica Yu <jeyu@...nel.org>

----------------------------------------------------------------
Jessica Yu (1):
       module: treat exit sections the same as init sections when !CONFIG_MODULE_UNLOAD

  kernel/module.c | 9 ++++-----
  1 file changed, 4 insertions(+), 5 deletions(-)