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| author | Jiri Olsa <[email protected]> | 2023-04-03 22:02:54 +0000 |
|---|---|---|
| committer | Andrii Nakryiko <[email protected]> | 2023-04-05 00:11:59 +0000 |
| commit | d099f594ad5650e8d8232b5f31f5f90104e65def (patch) | |
| tree | e127edade69cd05d27e5c026aff374125de683f8 /tools/bpf/bpftool/prog.c | |
| parent | Merge branch 'bpf: Follow up to RCU enforcement in the verifier.' (diff) | |
| download | kernel-d099f594ad5650e8d8232b5f31f5f90104e65def.tar.gz kernel-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 <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Andrii Nakryiko <[email protected]>
Tested-by: Artem Savkov <[email protected]>
Reviewed-by: Zhen Lei <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
[1] https://lore.kernel.org/bpf/[email protected]/
Diffstat (limited to 'tools/bpf/bpftool/prog.c')
0 files changed, 0 insertions, 0 deletions