Sqlite: fix DB corruption on some Samsung devices

arseny30 · arseny30 · commit d4f0162ee91a · 2020-08-12T22:54:34.000+03:00
GitOrigin-RevId: bc3e631f6873c0a4a53b8aea2159727fa0d1e956
diff --git a/sqlite/sqlite/sqlite3.c b/sqlite/sqlite/sqlite3.c
@@ -42840,7 +42840,8 @@ static int unixLockSharedMemory(unixFile *pDbFd, unixShmNode *pShmNode){
       ** -shm header size) rather than 0 as a system debugging aid, to
       ** help detect if a -shm file truncation is legitimate or is the work
       ** or a rogue process. */
-      if( rc==SQLITE_OK && robust_ftruncate(pShmNode->hShm, 3) ){
+      /* Fix SQLite DB corruption on some Samsung devices (3 changed to 0) */
+      if( rc==SQLITE_OK && robust_ftruncate(pShmNode->hShm, 0) ){
         rc = unixLogError(SQLITE_IOERR_SHMOPEN,"ftruncate",pShmNode->zFilename);
       }
     }

Original file line number	Diff line number	Diff line change
`@@ -42840,7 +42840,8 @@ static int unixLockSharedMemory(unixFile pDbFd, unixShmNode pShmNode){`
`42840`	`42840`	`** -shm header size) rather than 0 as a system debugging aid, to`
`42841`	`42841`	`** help detect if a -shm file truncation is legitimate or is the work`
`42842`	`42842`	`** or a rogue process. */`
`42843`		`- if( rc==SQLITE_OK && robust_ftruncate(pShmNode->hShm, 3) ){`
	`42843`	`+ /* Fix SQLite DB corruption on some Samsung devices (3 changed to 0) */`
	`42844`	`+ if( rc==SQLITE_OK && robust_ftruncate(pShmNode->hShm, 0) ){`
`42844`	`42845`	`rc = unixLogError(SQLITE_IOERR_SHMOPEN,"ftruncate",pShmNode->zFilename);`
`42845`	`42846`	`}`
`42846`	`42847`	`}`