perf pmus: Fixes always false when compare duplicates aliases

In the previous loop, all the members in the aliases[j-1] have been freed
and set to NULL. But in this loop, the function pmu_alias_is_duplicate()
compares the aliases[j] with the aliases[j-1] that has already been
disposed, so the function will always return false and duplicate aliases
will never be discarded.

If we find duplicate aliases, it skips the zfree aliases[j], which is
accompanied by a memory leak.

We can use the next aliases[j+1] to theck for duplicate aliases to
fixes the aliases NULL pointer dereference, then goto zfree code snippet
to release it.

After patch testing:
 $ perf list --unit=hisi_sicl,cpa pmu

 uncore cpa:
   cpa_p0_rd_dat_32b
        [Number of read ops transmitted by the P0 port which size is 32 bytes.
         Unit: hisi_sicl,cpa]
   cpa_p0_rd_dat_64b
        [Number of read ops transmitted by the P0 port which size is 64 bytes.
         Unit: hisi_sicl,cpa]

Fixes: c3245d2093c1 ("perf pmu: Abstract alias/event struct")
Signed-off-by: Junhao He <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Namhyung Kim <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

0 files changed, 0 insertions, 0 deletions