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| author |   Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> | 2022-06-01 19:51:59 +0900 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-10 15:53:12 +0200 |
| commit | 928ea98252ad75118950941683893cf904541da9 (patch) | |
| tree | 513a875e29ee2d55fd0a96954b3137d9f7247aec /Documentation | |
| parent | mei: me: add raptor lake point S DID (diff) | |
| download | linux-dev-928ea98252ad75118950941683893cf904541da9.tar.xz linux-dev-928ea98252ad75118950941683893cf904541da9.zip | |
bus: fsl-mc-bus: fix KASAN use-after-free in fsl_mc_bus_remove()
In fsl_mc_bus_remove(), mc->root_mc_bus_dev->mc_io is passed to
fsl_destroy_mc_io(). However, mc->root_mc_bus_dev is already freed in
fsl_mc_device_remove(). Then reference to mc->root_mc_bus_dev->mc_io
triggers KASAN use-after-free. To avoid the use-after-free, keep the
reference to mc->root_mc_bus_dev->mc_io in a local variable and pass to
fsl_destroy_mc_io().
This patch needs rework to apply to kernels older than v5.15.
Fixes: f93627146f0e ("staging: fsl-mc: fix asymmetry in destroy of mc_io")
Cc: stable@vger.kernel.org # v5.15+
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Link: https://lore.kernel.org/r/20220601105159.87752-1-shinichiro.kawasaki@wdc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions