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| author | Michael Ellerman <mpe@ellerman.id.au> | 2017-10-09 21:52:44 +1100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-20 10:05:00 +0100 |
| commit | afa8f0a7af7041665443603ee3c20609733ce940 (patch) | |
| tree | cc13006d755114c7af99e5eaca0f3e55f80a399f | |
| parent | 28a5b0e438f18bbacc977a38cf47b3d265ac3d27 (diff) | |
| download | linux-stable-afa8f0a7af7041665443603ee3c20609733ce940.tar.gz linux-stable-afa8f0a7af7041665443603ee3c20609733ce940.tar.bz2 linux-stable-afa8f0a7af7041665443603ee3c20609733ce940.zip | |
powerpc/perf/hv-24x7: Fix incorrect comparison in memord
[ Upstream commit 05c14c03138532a3cb2aa29c2960445c8753343b ]
In the hv-24x7 code there is a function memord() which tries to
implement a sort function return -1, 0, 1. However one of the
conditions is incorrect, such that it can never be true, because we
will have already returned.
I don't believe there is a bug in practice though, because the
comparisons are an optimisation prior to calling memcmp().
Fix it by swapping the second comparision, so it can be true.
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/powerpc/perf/hv-24x7.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c index 9f9dfda9ed2c..e8ca0fad2e69 100644 --- a/arch/powerpc/perf/hv-24x7.c +++ b/arch/powerpc/perf/hv-24x7.c @@ -514,7 +514,7 @@ static int memord(const void *d1, size_t s1, const void *d2, size_t s2) { if (s1 < s2) return 1; - if (s2 > s1) + if (s1 > s2) return -1; return memcmp(d1, d2, s1); |