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Bug#968335: kernel crash: WARNING: CPU: 0 PID: 0 at lib/percpu-refcount.c:155 percpu_ref_switch_to_atomic_rcu+0xf8/0x120

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  Bug#968335: kernel crash: WARNING: CPU: 0 PID: 0 at lib/percpu-refcount.c:155 percpu_ref_switch_to_atomic_rcu+0xf8/0x120 tobias <tobias@appelo.org> - 2020-08-13 17:20 +0200

#67768 — Bug#968335: kernel crash: WARNING: CPU: 0 PID: 0 at lib/percpu-refcount.c:155 percpu_ref_switch_to_atomic_rcu+0xf8/0x120

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Hello,

wanted to add that the issue gets triggered when running the following
script:

#!/bin/sh
if [ -x /usr/bin/certbot ]; then
   certbot -q    --authenticator standalone \
                 --installer none renew  \
                 --pre-hook "service apache2 stop" \
                 --post-hook "service apache2 start"
   sleep 60
   /bin/systemctl restart apache2
fi

if i run this script using previous kernel ( linux-image-4.19.0-9-amd64
) no kernel crash is happening.

tobias.

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