RISC-V: perf: fix resource cleanup on driver probe failure

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Sashiko pointed out various UAF and memory leak issues around
pmu_sbi_device_probe() error paths.

If the probe fails, here are list of cleanups needed.
a. Already registered pmu must be freed
b. per cpu IRQ must be released
c. pmu_ctr_list data structure must be freed
d. cpu hotplug state must be cleaned up only if added.

Fix the resource cleanup by reorganizing the code around probe failure.

Reported-by: Sashiko AI <sashiko-bot@kernel.org>
Reviewed-by: Charlie Jenkins <thecharlesjenkins@gmail.com>
Signed-off-by: Atish Patra <atishp@meta.com>
Link: https://patch.msgid.link/20260807-counter_delegation-v9-1-58658104e487@meta.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>

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Atish Patra 2026-08-07 19:24:30 -06:00 • committed by Paul Walmsley

parent 7e14e42edf

commit e24a1418e9

1 changed files with 27 additions and 6 deletions

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drivers/perf/riscv_pmu_sbi.c

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