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| author | Lukas Wunner <lukas@wunner.de> | 2020-12-07 09:17:04 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-03 08:22:06 +0200 |
| commit | fd047a839f0f1d0af99785c47c253804caefbf38 (patch) | |
| tree | 53164d63c33a92e85221d4c47d850847f028a8df /net/bluetooth | |
| parent | 62bb2c7f2411a0045c24831f11ecacfc35610815 (diff) | |
spi: spi-sh: Fix use-after-free on unbind
commit e77df3eca12be4b17f13cf9f215cff248c57d98f upstream.
spi_sh_remove() accesses the driver's private data after calling
spi_unregister_master() even though that function releases the last
reference on the spi_master and thereby frees the private data.
Fix by switching over to the new devm_spi_alloc_master() helper which
keeps the private data accessible until the driver has unbound.
Fixes: 680c1305e259 ("spi/spi_sh: use spi_unregister_master instead of spi_master_put in remove path")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: <stable@vger.kernel.org> # v3.0+: 5e844cc37a5c: spi: Introduce device-managed SPI controller allocation
Cc: <stable@vger.kernel.org> # v3.0+
Cc: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/6d97628b536baf01d5e3e39db61108f84d44c8b2.1607286887.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>
[lukas: backport to v4.4.270]
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/bluetooth')
0 files changed, 0 insertions, 0 deletions