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| author | Jens Wiklander <jens.wiklander@linaro.org> | 2021-06-15 22:23:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 09:19:30 +0100 |
| commit | da0b42d1c3fb95011aaa2e34fa3822e17ba23c1c (patch) | |
| tree | 2634046305dc831ddbb264833b6671e7a991ff66 | |
| parent | 24161b9c43de966789d5956428f45002d10f878e (diff) | |
| download | linux-stable-da0b42d1c3fb95011aaa2e34fa3822e17ba23c1c.tar.gz linux-stable-da0b42d1c3fb95011aaa2e34fa3822e17ba23c1c.tar.bz2 linux-stable-da0b42d1c3fb95011aaa2e34fa3822e17ba23c1c.zip | |
tee: fix put order in teedev_close_context()
[ Upstream commit f18397ab3ae23e8e43bba9986e66af6d4497f2ad ]
Prior to this patch was teedev_close_context() calling tee_device_put()
before teedev_ctx_put() leading to teedev_ctx_release() accessing
ctx->teedev just after the reference counter was decreased on the
teedev. Fix this by calling teedev_ctx_put() before tee_device_put().
Fixes: 217e0250cccb ("tee: use reference counting for tee_context")
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/tee/tee_core.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index 0f16d9ffd8d1..85e0cef9e917 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -84,8 +84,10 @@ void teedev_ctx_put(struct tee_context *ctx) static void teedev_close_context(struct tee_context *ctx) { - tee_device_put(ctx->teedev); + struct tee_device *teedev = ctx->teedev; + teedev_ctx_put(ctx); + tee_device_put(teedev); } static int tee_open(struct inode *inode, struct file *filp) |