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Prevent a possible crash when trying to recover using a carefully corrupted \

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and truncated rollback journal.  (Test case in TH3)

FossilOrigin-Name: 02828d717e2d97b1f59e9279cea9c06eed4accd4e262606bd90d060449c5a1a3
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drh
2017-09-07 09:56:37 +00:00
parent 3841372350
commit 05f1ba0ef8
3 changed files with 9 additions and 8 deletions
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src/pager.c
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@@ -1315,6 +1315,7 @@ static int readMasterJournal(sqlite3_file *pJrnl, char *zMaster, u32 nMaster){
|| szJ<16
|| SQLITE_OK!=(rc = read32bits(pJrnl, szJ-16, &len))
|| len>=nMaster
|| len>szJ-16
|| len==0
|| SQLITE_OK!=(rc = read32bits(pJrnl, szJ-12, &cksum))
|| SQLITE_OK!=(rc = sqlite3OsRead(pJrnl, aMagic, 8, szJ-8))