On 2024-08-05 11:27:13 [-0700], Eric Biggers wrote:
> From: Eric Biggers <ebiggers@xxxxxxxxxx>
>
> On PREEMPT_RT, kfree() takes sleeping locks and must not be called with
> preemption disabled. Therefore, on PREEMPT_RT skcipher_walk_done() must
> not be called from within a kernel_fpu_{begin,end}() pair, even when
> it's the last call which is guaranteed to not allocate memory.
>
> Therefore, move the last skcipher_walk_done() in gcm_crypt() to the end
> of the function so that it goes after the kernel_fpu_end(). To make
> this work cleanly, rework the data processing loop to handle only
> non-last data segments.
>
> Fixes: b06affb1cb58 ("crypto: x86/aes-gcm - add VAES and AVX512 / AVX10 optimized AES-GCM")
> Reported-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Closes: https://lore.kernel.org/linux-crypto/20240802102333.itejxOsJ@xxxxxxxxxxxxx
> Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Tested-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Thank you Eric.
Sebastian
