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| author | Jiri Olsa <jolsa@kernel.org> | 2023-04-04 00:02:54 +0200 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2023-04-04 17:11:59 -0700 |
| commit | d099f594ad5650e8d8232b5f31f5f90104e65def (patch) | |
| tree | e127edade69cd05d27e5c026aff374125de683f8 /usr | |
| parent | e8f59d84f43deab59bb86ff9e12cd4d542a4bb34 (diff) | |
| download | linux-d099f594ad5650e8d8232b5f31f5f90104e65def.tar.gz linux-d099f594ad5650e8d8232b5f31f5f90104e65def.tar.bz2 linux-d099f594ad5650e8d8232b5f31f5f90104e65def.zip | |
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: 31bf1dbccfb0 ("bpf: Fix attaching fentry/fexit/fmod_ret/lsm to modules")
Reported-by: Artem Savkov <asavkov@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Tested-by: Artem Savkov <asavkov@redhat.com>
Reviewed-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/bpf/20230403220254.2191240-1-jolsa@kernel.org
[1] https://lore.kernel.org/bpf/ZBrPMkv8YVRiWwCR@samus.usersys.redhat.com/
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions