The patch titled
Subject: lib/lzo/lzo1x_compress.c: fix alignment bug in lzo-rle
has been added to the -mm tree. Its filename is
lib-lzo-fix-alignment-bug-in-lzo-rle.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/lib-lzo-fix-alignment-bug-in-lzo-rle.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/lib-lzo-fix-alignment-bug-in-lzo-rle.patch
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------------------------------------------------------
From: Dave Rodgman <dave.rodgman@xxxxxxx>
Subject: lib/lzo/lzo1x_compress.c: fix alignment bug in lzo-rle
Fix an unaligned access which breaks on platforms where this is not
permitted (e.g., Sparc).
Link: http://lkml.kernel.org/r/20190912145502.35229-1-dave.rodgman@xxxxxxx
Signed-off-by: Dave Rodgman <dave.rodgman@xxxxxxx>
Cc: Dave Rodgman <dave.rodgman@xxxxxxx>
Cc: Markus F.X.J. Oberhumer <markus@xxxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/lzo/lzo1x_compress.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
--- a/lib/lzo/lzo1x_compress.c~lib-lzo-fix-alignment-bug-in-lzo-rle
+++ a/lib/lzo/lzo1x_compress.c
@@ -83,17 +83,19 @@ next:
ALIGN((uintptr_t)ir, 4)) &&
(ir < limit) && (*ir == 0))
ir++;
- for (; (ir + 4) <= limit; ir += 4) {
- dv = *((u32 *)ir);
- if (dv) {
+ if (IS_ALIGNED((uintptr_t)ir, 4)) {
+ for (; (ir + 4) <= limit; ir += 4) {
+ dv = *((u32 *)ir);
+ if (dv) {
# if defined(__LITTLE_ENDIAN)
- ir += __builtin_ctz(dv) >> 3;
+ ir += __builtin_ctz(dv) >> 3;
# elif defined(__BIG_ENDIAN)
- ir += __builtin_clz(dv) >> 3;
+ ir += __builtin_clz(dv) >> 3;
# else
# error "missing endian definition"
# endif
- break;
+ break;
+ }
}
}
#endif
_
Patches currently in -mm which might be from dave.rodgman@xxxxxxx are
lib-lzo-fix-alignment-bug-in-lzo-rle.patch
