In scatterwalk_map_and_copy(), sg_next(sg) is called,
loop goes back to top and scatterwalk_start() gets called
again. When next sg is NULL, BUG_ON may occur in next call to
scatterwalk_start().
Please let me know if following patch takes
right approach to fix this.
regards,
Joy
Signed-off-by: Joy Latten <latten@xxxxxxxxxxxxxx>
diff -urpN cryptodev-2.6.2/crypto/scatterwalk.c cryptodev-2.6.2.sandbox/crypto/scatterwalk.c
--- cryptodev-2.6.2/crypto/scatterwalk.c 2007-12-05 00:23:37.000000000 -0600
+++ cryptodev-2.6.2.sandbox/crypto/scatterwalk.c 2007-12-06 00:10:56.000000000 -0600
@@ -106,7 +106,7 @@ void scatterwalk_map_and_copy(void *buf,
struct scatter_walk walk;
unsigned int offset = 0;
- for (;;) {
+ do {
scatterwalk_start(&walk, sg);
if (start < offset + sg->length)
@@ -114,7 +114,7 @@ void scatterwalk_map_and_copy(void *buf,
offset += sg->length;
sg = sg_next(sg);
- }
+ } while (sg != NULL);
scatterwalk_advance(&walk, start - offset);
scatterwalk_copychunks(buf, &walk, nbytes, out);
-
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