On Mon, Nov 01, 2021 at 11:13:53AM +0800, Meng Li wrote:
> When enable the kernel debug config, there is below calltrace detected:
> BUG: using smp_processor_id() in preemptible [00000000] code: cryptomgr_test/339
> caller is debug_smp_processor_id+0x20/0x30
> CPU: 9 PID: 339 Comm: cryptomgr_test Not tainted 5.10.63-yocto-standard #1
> Hardware name: NXP Layerscape LX2160ARDB (DT)
> Call trace:
> dump_backtrace+0x0/0x1a0
> show_stack+0x24/0x30
> dump_stack+0xf0/0x13c
> check_preemption_disabled+0x100/0x110
> debug_smp_processor_id+0x20/0x30
> dpaa2_caam_enqueue+0x10c/0x25c
> ......
> cryptomgr_test+0x38/0x60
> kthread+0x158/0x164
> ret_from_fork+0x10/0x38
> According to the comment in commit ac5d15b4519f("crypto: caam/qi2
> - use affine DPIOs "), because preemption is no longer disabled
> while trying to enqueue an FQID, it might be possible to run the
> enqueue on a different CPU(due to migration, when in process context),
> however this wouldn't be a functionality issue. But there will be
> above calltrace when enable kernel debug config. So, replace this_cpu_ptr
> with raw_cpu_ptr to avoid above call trace.
>
> Fixes: ac5d15b4519f ("crypto: caam/qi2 - use affine DPIOs")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Meng Li <Meng.Li@xxxxxxxxxxxxx>
> ---
> v2:
>
> Add comment to describe why the raw_cpu_ptr is safe.
> drivers/crypto/caam/caamalg_qi2.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Patch applied. Thanks.
--
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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