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| author | Lukas Wunner <lukas@wunner.de> | 2020-12-07 09:17:05 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-17 13:55:13 +0100 |
| commit | 5d474e3f5edbbb79470d35f77669c7da5ea16a42 (patch) | |
| tree | f306f2177b3203a5313d5122fefc8f4bc9e738e5 /kernel/locking/rtmutex-debug.c | |
| parent | b0260231660261a9b7b2eaaea5188baba163f81f (diff) | |
spi: pxa2xx: Fix use-after-free on unbind
commit 5626308bb94d9f930aa5f7c77327df4c6daa7759 upstream
pxa2xx_spi_remove() accesses the driver's private data after calling
spi_unregister_controller() even though that function releases the last
reference on the spi_controller and thereby frees the private data.
Fix by switching over to the new devm_spi_alloc_master/slave() helper
which keeps the private data accessible until the driver has unbound.
Fixes: 32e5b57232c0 ("spi: pxa2xx: Fix controller unregister order")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: <stable@vger.kernel.org> # v2.6.17+: 5e844cc37a5c: spi: Introduce device-managed SPI controller allocation
Cc: <stable@vger.kernel.org> # v2.6.17+: 32e5b57232c0: spi: pxa2xx: Fix controller unregister order
Cc: <stable@vger.kernel.org> # v2.6.17+
Link: https://lore.kernel.org/r/5764b04d4a6e43069ebb7808f64c2f774ac6f193.1607286887.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>
[sudip: adjust context]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/locking/rtmutex-debug.c')
0 files changed, 0 insertions, 0 deletions