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Change History

In the Linux kernel, the following vulnerability has been resolved:

crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree

Annotating a local pointer variable, which will be assigned with the
kmalloc-family functions, with the `__cleanup(kfree)` attribute will
make the address of the local variable, rather than the address returned
by kmalloc, passed to kfree directly and lead to a crash due to invalid
deallocation of stack address. According to other places in the repo,
the correct usage should be `__free(kfree)`. The code coincidentally
compiled because the parameter type `void *` of kfree is compatible with
the desired type `struct { ... } **`.

https://git.kernel.org/stable/c/90f9090e3e744a8fe3bb6fa0e61f577347728b0b

https://git.kernel.org/stable/c/9a3ace9b010ffd8c422c97844ae152f7c53d6b18

https://git.kernel.org/stable/c/d5abcc33ee76bc26d58b39dc1a097e43a99dd438