[PATCH 5.4 0/2] backport add and use mode_strip_sgid in vfs_*() helpers

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Subject: [PATCH 5.4 0/2] backport add and use mode_strip_sgid in vfs_*() helpers
From: Mahmoud Adam <mngyadam@xxxxxxxxxx>
Date: Wed, 24 Jan 2024 14:00:24 +0100
Cc: <viro@xxxxxxxxxxxxxxxxxx>, <xuyang2018.jy@xxxxxxxxxxx>, <stable@xxxxxxxxxxxxxxx>, <linux-nfs@xxxxxxxxxxxxxxx>, <--suppress-cc=body@xxxxxxxxxx>

These patches are a follow up fixes for CVE-2021-4037 &
CVE-2018-13405, LTP test creat09.c & openat04.c reproduces the
privilege escalation in v5.4, the two patches solves this and they are
already backported to the other stable kernels.

Follow-Ups:
- Re: [PATCH 5.4 0/2] backport add and use mode_strip_sgid in vfs_*() helpers
  - From: Greg KH
- [PATCH 1/2] fs: add mode_strip_sgid() helper
  - From: Mahmoud Adam
- [PATCH 2/2] fs: move S_ISGID stripping into the vfs_*() helpers
  - From: Mahmoud Adam

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