[PATCH 6.12.y 0/2] backport: thermal: core: Address thermal zone removal races with resume

[Mauricio Faria de Oliveira <mfo@igalia.com>]

This is a backport of upstream commit 45b859b07282 ("thermal: core: Address thermal zone removal races with resume")
which failed to apply to 6.12-stable tree, with one dependency commit
(not strictly necessary, but simple and makes the backport simpler).

Only minor changes were necessary in PATCH 2/2 (see backport comment).

Tested on v6.12.81 with the synthetic reproducers wrote for mainline.
Both scenarios fail (i.e., hit use-after-free) without these patches,
and pass (do not hit use-after-free) with these patches.

I could not perform further testing than the synthetic reproducers
(which exercise very specific code paths), so reviews and/or tests
are welcome.

Thanks,
Mauricio

Rafael J. Wysocki (2):
  thermal: core: Mark thermal zones as exiting before unregistration
  thermal: core: Address thermal zone removal races with resume

 drivers/thermal/thermal_core.c | 36 +++++++++++++++++++++++++++++-----
 drivers/thermal/thermal_core.h |  1 +
 2 files changed, 32 insertions(+), 5 deletions(-)

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2.51.0