diff --git a/manifest b/manifest
index 4e629f4c15..9f2eb94893 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Update\scksumvfs.c\sso\sthat\sif\sSQLITE_AMALGAMATION\sis\sdefined,\sSQLITE_CKSUMVFS_STATIC\sis\simplied.
-D 2020-11-18T20:55:01.090
+C If\sa\sread()\sor\spread()\sindicates\sthat\sthe\sdatabase\sfile\sis\sunreadable\sdue\sto\nfilesystem\sdamage,\sthen\sit\sreturns\sSQLITE_IOERR_CORRUPTFS\swhich\sis\sthen\nconverted\sinto\sSQLITE_CORRUPT\sbefore\sbeing\sreturned\sto\sthe\sapplication.
+D 2020-11-18T23:44:41.584
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -503,7 +503,7 @@ F src/insert.c 7e081d33aab4a9d761c39dccf3c3872c35501565d2ed9db66301918d23bc7901
 F src/legacy.c d7874bc885906868cd51e6c2156698f2754f02d9eee1bae2d687323c3ca8e5aa
 F src/loadext.c 436af4968c6954d304fce9efa12719367bd8f37b19b93b71d6ad607e85adbb47
 F src/main.c 54d61d1e94f225636053c862c930d7dd7b29162b93d3f3ecb00439910ccba02a
-F src/malloc.c 413b0ffea2b45c37c6cf2ed5509f6d6b508b0a033caa9b4bf90bed4ee044a2ff
+F src/malloc.c c1af4ac5a463648cd2953fd4ac679b3ba9022ce5ec794a60806150ad69dfd33a
 F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
 F src/mem1.c c12a42539b1ba105e3707d0e628ad70e611040d8f5e38cf942cee30c867083de
 F src/mem2.c b93b8762ab999a29ae7751532dadf0a1ac78040308a5fb1d17fcc365171d67eb
@@ -522,7 +522,7 @@ F src/os.c 80e4cf3e5da06be03ca641661e331ce60eeeeabf0d7354dbb1c0e166d0eedbbe
 F src/os.h 48388821692e87da174ea198bf96b1b2d9d83be5dfc908f673ee21fafbe0d432
 F src/os_common.h b2f4707a603e36811d9b1a13278bffd757857b85
 F src/os_setup.h 0dbaea40a7d36bf311613d31342e0b99e2536586
-F src/os_unix.c ff10667369f3b05aa697278a72d58fe7a43aaa674cb3fa9654d0fe21cda265d0
+F src/os_unix.c c19f392825f4787dbdff2637371ba2210eef8aecfc268509c7aafa9beea3a653
 F src/os_win.c 77d39873836f1831a9b0b91894fec45ab0e9ca8e067dc8c549e1d1eca1566fe9
 F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
 F src/pager.c 3700a1c55427a3d4168ad1f1b8a8b0cb9ace1d107e4506e30a8f1e66d8a1195e
@@ -540,7 +540,7 @@ F src/resolve.c 1948a92ca9eab776632816b97e57c61d933474a78aad4f4ef835c916a83dbb1c
 F src/rowset.c ba9515a922af32abe1f7d39406b9d35730ed65efab9443dc5702693b60854c92
 F src/select.c 31387e56f5e6d1adc798dfa04b946001289a61e65acf4615f7b7130f121f3b9c
 F src/shell.c.in 2871f579186e71db54cdf6b262951d2cd88aa61747a3f3e745ade425268fd6f6
-F src/sqlite.h.in ff32663b457306eb88c3039868280aa39da31162ed69c4e71fa8e028684e7277
+F src/sqlite.h.in 70a0c35d729f16e9b57d29e371f2f090c3fda1d0e007df0c446df5560710dd40
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 2d1af80082edffd71c6f96f70ad1ce6a4fb46615ad10291fc77fe0dea9ff0197
 F src/sqliteInt.h c01115c8dd967f7d334a98ba37ac821eafb04144c8085a795daaf2185743d27a
@@ -610,7 +610,7 @@ F src/upsert.c 2920de71b20f04fe25eb00b655d086f0ba60ea133c59d7fa3325c49838818e78
 F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
 F src/util.c c0c7977de7ef9b8cb10f6c85f2d0557889a658f817b0455909a49179ba4c8002
 F src/vacuum.c 492422c1463c076473bae1858799c7a0a5fe87a133d1223239447c422cd26286
-F src/vdbe.c 6f3fb4f058c478b38c5280ccfc939745076c6a693999e49846c99fdc761c9c90
+F src/vdbe.c 0f4402a3f8ab7d7f37fbed04d74007f978805aa6ca09738606331e0dc7b2b614
 F src/vdbe.h 83603854bfa5851af601fc0947671eb260f4363e62e960e8a994fb9bbcd2aaa1
 F src/vdbeInt.h 3ca5e9fd6e095a8b6cf6bc3587a46fc93499503b2fe48951e1034ba9e2ce2f6e
 F src/vdbeapi.c c5e7cb2ab89a24d7f723e87b508f21bfb1359a04db5277d8a99fd1e015c12eb9
@@ -1885,7 +1885,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 43d4801df5dc4625f6829ed8246758493842b2416ba609ee0423ef63155cece2
-R 819b2a35faf033f5ae6dd8bf0e39c618
-U dan
-Z 008d2a9a3f8427ff308e19cdcb995f1d
+P 184e9d782dfbad8011b5b0043b3fd8e5a369ed7076e37e14b301483ce5ffe5db b887c7504e7edeba758f3c1203c6cc56eef499fe05e7e6c6d82939bf7d78c57f
+R ca853ae029f53cda2f5e4e09a853497d
+T +closed b887c7504e7edeba758f3c1203c6cc56eef499fe05e7e6c6d82939bf7d78c57f
+U drh
+Z 9d8b812fa0a6ee7104c4c9d6ceb68cc7
diff --git a/manifest.uuid b/manifest.uuid
index 84a0c7409d..e272363bc4 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-184e9d782dfbad8011b5b0043b3fd8e5a369ed7076e37e14b301483ce5ffe5db
\ No newline at end of file
+849e4e14fd06eda512381f5f8aa65f75ad0a955e835da7c63526a53cf5e8f4dc
\ No newline at end of file
diff --git a/src/malloc.c b/src/malloc.c
index 35ad21ecc7..a0f7a739c0 100644
--- a/src/malloc.c
+++ b/src/malloc.c
@@ -791,12 +791,15 @@ void sqlite3OomClear(sqlite3 *db){
 }
 
 /*
-** Take actions at the end of an API call to indicate an OOM error
+** Take actions at the end of an API call to deal with error codes.
 */
-static SQLITE_NOINLINE int apiOomError(sqlite3 *db){
-  sqlite3OomClear(db);
-  sqlite3Error(db, SQLITE_NOMEM);
-  return SQLITE_NOMEM_BKPT;
+static SQLITE_NOINLINE int apiHandleError(sqlite3 *db, int rc){
+  if( db->mallocFailed || rc==SQLITE_IOERR_NOMEM ){
+    sqlite3OomClear(db);
+    sqlite3Error(db, SQLITE_NOMEM);
+    return SQLITE_NOMEM_BKPT;
+  }
+  return rc & db->errMask;
 }
 
 /*
@@ -818,8 +821,8 @@ int sqlite3ApiExit(sqlite3* db, int rc){
   */
   assert( db!=0 );
   assert( sqlite3_mutex_held(db->mutex) );
-  if( db->mallocFailed || rc==SQLITE_IOERR_NOMEM ){
-    return apiOomError(db);
+  if( db->mallocFailed || rc ){
+    return apiHandleError(db, rc);
   }
   return rc & db->errMask;
 }
diff --git a/src/os_unix.c b/src/os_unix.c
index 6badcbd390..18f2b54618 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -3375,7 +3375,24 @@ static int unixRead(
   if( got==amt ){
     return SQLITE_OK;
   }else if( got<0 ){
-    /* lastErrno set by seekAndRead */
+    /* pFile->lastErrno has been set by seekAndRead().
+    ** Usually we return SQLITE_IOERR_READ here, though for some
+    ** kinds of errors we return SQLITE_IOERR_CORRUPTFS.  The
+    ** SQLITE_IOERR_CORRUPTFS will be converted into SQLITE_CORRUPT
+    ** prior to returning to the application by the sqlite3ApiExit()
+    ** routine.
+    */
+    switch( pFile->lastErrno ){
+      case ERANGE:
+      case EIO:
+#ifdef ENXIO
+      case ENXIO:
+#endif
+#ifdef EDEVERR
+      case EDEVERR:
+#endif
+        return SQLITE_IOERR_CORRUPTFS;
+    }
     return SQLITE_IOERR_READ;
   }else{
     storeLastErrno(pFile, 0);   /* not a system error */
diff --git a/src/sqlite.h.in b/src/sqlite.h.in
index d8ea43cf82..c6a3bf9344 100644
--- a/src/sqlite.h.in
+++ b/src/sqlite.h.in
@@ -504,6 +504,7 @@ int sqlite3_exec(
 #define SQLITE_IOERR_COMMIT_ATOMIC     (SQLITE_IOERR | (30<<8))
 #define SQLITE_IOERR_ROLLBACK_ATOMIC   (SQLITE_IOERR | (31<<8))
 #define SQLITE_IOERR_DATA              (SQLITE_IOERR | (32<<8))
+#define SQLITE_IOERR_CORRUPTFS         (SQLITE_IOERR | (33<<8))
 #define SQLITE_LOCKED_SHAREDCACHE      (SQLITE_LOCKED |  (1<<8))
 #define SQLITE_LOCKED_VTAB             (SQLITE_LOCKED |  (2<<8))
 #define SQLITE_BUSY_RECOVERY           (SQLITE_BUSY   |  (1<<8))
diff --git a/src/vdbe.c b/src/vdbe.c
index 5823ebd922..5d9aacbadc 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -8157,7 +8157,11 @@ default: {          /* This is really OP_Noop, OP_Explain */
   ** an error of some kind.
   */
 abort_due_to_error:
-  if( db->mallocFailed ) rc = SQLITE_NOMEM_BKPT;
+  if( db->mallocFailed ){
+    rc = SQLITE_NOMEM_BKPT;
+  }else if( rc==SQLITE_IOERR_CORRUPTFS ){
+    rc = SQLITE_CORRUPT_BKPT;
+  }
   assert( rc );
   if( p->zErrMsg==0 && rc!=SQLITE_IOERR_NOMEM ){
     sqlite3VdbeError(p, "%s", sqlite3ErrStr(rc));