diff --git a/src/osd/osd_rmw.cpp b/src/osd/osd_rmw.cpp
index a11bf788..94b68529 100644
--- a/src/osd/osd_rmw.cpp
+++ b/src/osd/osd_rmw.cpp
@@ -1199,6 +1199,7 @@ static std::vector<int> ec_check_combination(osd_rmw_stripe_t *stripes, int stri
         auto & bs = brute_stripes[src.role];
         bs.bmp_buf = src.bmp_buf;
         bs.write_buf = bs.read_buf = src.read_buf;
+        bs.role = subset[i];
     }
     for (int i = 0; i < pg_size; i++)
     {
@@ -1209,13 +1210,21 @@ static std::vector<int> ec_check_combination(osd_rmw_stripe_t *stripes, int stri
             bs.missing = true;
             assert(tmp_buf.size() >= (i+1)*(chunk_size+bitmap_size));
             bs.read_buf = bs.write_buf = tmp_buf.data() + i*(chunk_size+bitmap_size);
-            bs.bmp_buf = bs.read_buf + chunk_size;
+            if (bitmap_size)
+            {
+                bs.bmp_buf = bs.write_buf + chunk_size;
+            }
         }
         else if (i >= pg_minsize)
         {
             // parity chunks are regenerated in their write_bufs, so use a temporary buffer
             assert(tmp_buf.size() >= (i+1)*(chunk_size+bitmap_size));
             bs.write_buf = tmp_buf.data() + i*(chunk_size+bitmap_size);
+            if (bitmap_size)
+            {
+                bs.bmp_buf = bs.write_buf + chunk_size;
+                memcpy(bs.bmp_buf, stripes[i].bmp_buf, bitmap_size);
+            }
         }
     }
     if (is_xor)
@@ -1242,7 +1251,8 @@ static std::vector<int> ec_check_combination(osd_rmw_stripe_t *stripes, int stri
             // source chunk, mark OK
             good_set.push_back(i);
         }
-        else if (memcmp(stripes[i].role < pg_minsize ? bs.read_buf : bs.write_buf, stripes[i].read_buf, chunk_size) == 0)
+        else if (memcmp(stripes[i].role < pg_minsize ? bs.read_buf : bs.write_buf, stripes[i].read_buf, chunk_size) == 0 &&
+            (!bitmap_size || memcmp(bs.bmp_buf, stripes[i].bmp_buf, bitmap_size) == 0))
         {
             // matching chunk, mark OK
             good_set.push_back(i);
diff --git a/src/osd/osd_rmw_test.cpp b/src/osd/osd_rmw_test.cpp
index 5023bb9e..eeeb561e 100644
--- a/src/osd/osd_rmw_test.cpp
+++ b/src/osd/osd_rmw_test.cpp
@@ -1218,13 +1218,17 @@ void test_ec43_error_bruteforce()
     osd_num_t osd_set[7] = { 1, 2, 3, 4, 5, 6, 7 };
     osd_rmw_stripe_t stripes[7] = {};
     split_stripes(4, 4096, 0, 4096 * 4, stripes);
+    uint8_t *bmp_buf = (uint8_t*)malloc_or_die(4 * 7);
+    memset(bmp_buf, 0xff, 4 * 4);
+    for (int i = 0; i < 7; i++)
+        stripes[i].bmp_buf = bmp_buf + i*4;
     uint8_t *write_buf = (uint8_t*)malloc_or_die(4096 * 7);
     set_pattern(write_buf+0*4096, 4096, PATTERN0);
     set_pattern(write_buf+1*4096, 4096, PATTERN1);
     set_pattern(write_buf+2*4096, 4096, PATTERN2);
     set_pattern(write_buf+3*4096, 4096, PATTERN3);
-    uint8_t *rmw_buf = (uint8_t*)calc_rmw(write_buf, stripes, osd_set, 7, 4, 7, osd_set, 4096, 0);
-    calc_rmw_parity_ec(stripes, 7, 4, osd_set, osd_set, 4096, 0);
+    uint8_t *rmw_buf = (uint8_t*)calc_rmw(write_buf, stripes, osd_set, 7, 4, 7, osd_set, 4096, 4);
+    calc_rmw_parity_ec(stripes, 7, 4, osd_set, osd_set, 4096, 4);
     check_pattern(stripes[4].write_buf, 4096, PATTERN0^PATTERN1^PATTERN2^PATTERN3);
     check_pattern(stripes[5].write_buf, 4096, 0xfcee568ba36371ac); // 2nd EC chunk
     check_pattern(stripes[6].write_buf, 4096, 0x139274739ae6f387); // 3rd EC chunk
@@ -1242,26 +1246,27 @@ void test_ec43_error_bruteforce()
         stripes[i].osd_num = i+1;
     }
     // All good chunks
-    auto res = ec_find_good(stripes, 7, 7, 4, false, 4096, 0, 100, true);
+    auto res = ec_find_good(stripes, 7, 7, 4, false, 4096, 4, 100, true);
     assert_eq_vec(res, std::vector<int>({0, 1, 2, 3, 4, 5, 6}));
     // 1 missing chunk
     set_pattern(write_buf+1*4096, 4096, 0);
-    res = ec_find_good(stripes, 7, 7, 4, false, 4096, 0, 100, true);
+    res = ec_find_good(stripes, 7, 7, 4, false, 4096, 4, 100, true);
     assert_eq_vec(res, std::vector<int>({0, 2, 3, 4, 5, 6}));
     // 2 missing chunks
     set_pattern(write_buf+1*4096, 4096, 0);
     set_pattern(write_buf+5*4096, 4096, 0);
-    res = ec_find_good(stripes, 7, 7, 4, false, 4096, 0, 100, true);
+    res = ec_find_good(stripes, 7, 7, 4, false, 4096, 4, 100, true);
     assert_eq_vec(res, std::vector<int>({0, 2, 3, 4, 6}));
     // 3 missing chunks
     set_pattern(write_buf+1*4096, 4096, 0);
     set_pattern(write_buf+5*4096, 4096, 0);
     set_pattern(write_buf+6*4096, 4096, 0);
-    res = ec_find_good(stripes, 7, 7, 4, false, 4096, 0, 100, true);
+    res = ec_find_good(stripes, 7, 7, 4, false, 4096, 4, 100, true);
     assert_eq_vec(res, std::vector<int>());
     // Done
     free(rmw_buf);
     free(write_buf);
+    free(bmp_buf);
     use_ec(7, 4, false);
 }
 
diff --git a/src/osd/osd_scrub.cpp b/src/osd/osd_scrub.cpp
index c2efb7b6..6f898de6 100644
--- a/src/osd/osd_scrub.cpp
+++ b/src/osd/osd_scrub.cpp
@@ -474,7 +474,9 @@ void osd_t::scrub_check_results(osd_op_t *cur_op)
                 for (int other = 0; other < role; other++)
                 {
                     // Only compare with unique chunks (eq_to[other] == other)
-                    if (eq_to[other] == other && memcmp(op_data->stripes[role].read_buf, op_data->stripes[other].read_buf, bs_block_size) == 0)
+                    if (eq_to[other] == other &&
+                        memcmp(op_data->stripes[role].read_buf, op_data->stripes[other].read_buf, bs_block_size) == 0 &&
+                        memcmp(op_data->stripes[role].bmp_buf, op_data->stripes[other].bmp_buf, clean_entry_bitmap_size) == 0)
                     {
                         eq_to[role] = eq_to[other];
                         break;