linux-kernel - [PATCH 0/2] Fix invalid wait context of set_track

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Message-ID: <20231115082138.2649870-1-liushixin2@huawei.com>
Date:   Wed, 15 Nov 2023 16:21:36 +0800
From:   Liu Shixin <liushixin2@...wei.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Patrick Wang <patrick.wang.shcn@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Liu Shixin <liushixin2@...wei.com>
Subject: [PATCH 0/2] Fix invalid wait context of set_track_prepare()

Geert reported an invalid wait context[1] which is resulted by moving
set_track_prepare() inside kmemleak_lock. This is not allowed because
in RT mode, the spinlocks can be preempted but raw_spinlocks can not,
so it is not allowd to acquire spinlocks while holding raw_spinlocks.
The second patch fix same problem in kmemleak_update_trace().

Link: https://lore.kernel.org/linux-mm/CAMuHMdWj0UzwNaxUvcocTfh481qRJpOWwXxsJCTJfu1oCqvgdA@mail.gmail.com/ [1]

Liu Shixin (2):
  Revert "mm/kmemleak: move the initialisation of object to
    __link_object"
  mm/kmemleak: move set_track_prepare() outside raw_spinlocks

 mm/kmemleak.c | 40 ++++++++++++++++++++++------------------
 1 file changed, 22 insertions(+), 18 deletions(-)

-- 
2.25.1