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kallsyms: Disable preemption for find_kallsyms_symbol_value #4875

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kallsyms: Disable preemption for find_kallsyms_symbol_value #4875

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Commits on Apr 5, 2023

  1. adding ci files

    Kernel Patches Daemon committed Apr 5, 2023
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  2. kallsyms: Disable preemption for find_kallsyms_symbol_value 

    Artem reported suspicious RCU usage [1]. The reason is that verifier
calls find_kallsyms_symbol_value with preemption enabled which will
trigger suspicious RCU usage warning in rcu_dereference_sched call.

Disabling preemption in find_kallsyms_symbol_value and adding
__find_kallsyms_symbol_value function.

Fixes: 31bf1db ("bpf: Fix attaching fentry/fexit/fmod_ret/lsm to modules")
[1] https://lore.kernel.org/bpf/ZBrPMkv8YVRiWwCR@samus.usersys.redhat.com/
Reported-by: Artem Savkov <asavkov@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Reviewed-by: Zhen Lei <thunder.leizhen@huawei.com>
Tested-by: Artem Savkov <asavkov@redhat.com>
    @olsajiri
    olsajiri authored and Kernel Patches Daemon committed Apr 5, 2023
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