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| author | Michael Ellerman <mpe@ellerman.id.au> | 2023-05-05 06:51:27 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-05-18 01:24:33 +0300 |
| commit | 7581495ac82d6cb073609284c7f7186a48021d1e (patch) | |
| tree | 9c7e7ec7e0c2c4bd529b8c69b6e2a01a8f21cdbc /mm/balloon_compaction.c | |
| parent | d461aac924b937bcb4fd0ca1242b3ef6868ecddd (diff) | |
| download | linux-7581495ac82d6cb073609284c7f7186a48021d1e.tar.xz | |
mm: kfence: fix false positives on big endian
Since commit 1ba3cbf3ec3b ("mm: kfence: improve the performance of
__kfence_alloc() and __kfence_free()"), kfence reports failures in random
places at boot on big endian machines.
The problem is that the new KFENCE_CANARY_PATTERN_U64 encodes the address
of each byte in its value, so it needs to be byte swapped on big endian
machines.
The compiler is smart enough to do the le64_to_cpu() at compile time, so
there is no runtime overhead.
Link: https://lkml.kernel.org/r/20230505035127.195387-1-mpe@ellerman.id.au
Fixes: 1ba3cbf3ec3b ("mm: kfence: improve the performance of __kfence_alloc() and __kfence_free()")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/balloon_compaction.c')
0 files changed, 0 insertions, 0 deletions