+ lib-lzo-fix-alignment-bug-in-lzo-rle.patch added to -mm tree

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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




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