mbox series

[0/2] Fix invalid wait context of set_track_prepare()

Message ID 20231115082138.2649870-1-liushixin2@huawei.com (mailing list archive)
Headers show
Series Fix invalid wait context of set_track_prepare() | expand

Message

Liu Shixin Nov. 15, 2023, 8:21 a.m. UTC 
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(-)