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El vie., 23 de julio de 2021 6:46 a. m., Jens Wiklander < jens.wiklander@linaro.org> escribió:
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") Signed-off-by: Jens Wiklander jens.wiklander@linaro.org
drivers/tee/tee_core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index 2b37bc408fc3..85102d12d716 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -98,8 +98,10 @@ 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)
2.31.1